Page 490
EXHIBIT NO. 16 (HART INQUIRY)
SECRET

UNITED STATES PACIFIC FLEET
U. S. S. PENNSYLVANIA, FLAGSHIP
Cincpac file no.
A16/WPPac-46(16)
Serial 063W

                                     PEARL HARBOR, T. H., July 25, 1941.

From: Commander-in-Chief, U. S. Pacific Fleet.
To: Distribution List for WPPac-46.
Subject: WPPac-46.

1. The subject publication is distributed herewith. This Plan has not
yet been approved by the Chief of Naval Operations but may be placed in
effect prior to the receipt of such approval.

Page 491

2. Attention is invited to the Introduction, Chapter III, article 0301
of the Plan concerning the preparation of supporting plans by Task Force
Commanders. At the present time it is desired that the following submit
supporting plans for approval by the Commander-in-Chief:

Commanders Task Forces Two, Three, Six, Seven and Nine. (Commander Task
Force Nine may, if he desires, delegate preparation of the plan to the
Senior Officer of that type in the Hawaiian Area.)

The Commanders of the Naval Coastal Frontiers addressed may provide for
the accomplishment of such tasks as are assigned them in this O-1 Plan
by including suitable measures in their O-4 or other plans, rather than
to prepare separate supporting plans for this O-1 Plan. The Commander
Southeast Pacific Force (Commander Cruiser Division Three) is required
to submit the plan for operations of that force after its detachment
from the Fleet to the Chief of Naval Operations for approval.

3. Supporting Plans as required above will be submitted for approval of
the Commander-in-Chief prior to 20 August 1941. After approval they will
be incorporated with the Fleet Plan as annexes as prescribed by the
Commander-in-Chief.

4. Further annexes prepared by the Commander-in-Chief to cover
operations to be undertaken in later phases of the war will be
distributed when completed and approved.

5. Suitable binders for this Plan will be forwarded as soon as received
by this command.
                                                           H. E. Kimmel.
                                                           H. E. KIMMEL.

[i]
                                SECRET
                      UNITED STATES PACIFIC FLEET
                    U. S. S. PENNSYLVANIA, Flagship

CinCpac File
A16/WPPac-46(16)
Serial 056W.

                                     PEARL HARBOR, T. H., July 21, 1941.

From: Commander-in-Chief, U. S PACIFIC FLEET
To: Distribution List for WPPac-46.
Subject: WPPac-46, promulgation of.
Enclosures:
   (A) Pages for WPPac-46; Reg. No. 5 including list of effective pages.
   (B) Receipt form in duplicate.

1. U. S. PACIFIC FLEET Operating Plan Rainbow Five (Navy Plan O-1
Rainbow Five) (WPPac-46) is promulgated herewith. Holders of Commander-
in-Chief, U. S. Pacific Fleet Secret letter A16(R-5)040W of May 27, 1941
and the tentative Operation Plan promulgated thereby, will destroy them
by burning and make report of destruction to the Commander-in-Chief, U.
S. Pacific Fleet.

2. A receipt form is enclosed to be accomplished and forwarded to the
Chief of Naval Operations (Registered Publications Section).

3. This publication will be handled and accounted for in accordance with
the instructions contained in the Navy Regulations, the System of War
Planning and the Registered Publication Manual.

4. This volume shall not be carried in aircraft, and when not in use,
shall be kept in Class "A" storage as prescribed in the Registered
Publication Manual.

5. IT IS FORBIDDEN TO MAKE EXTRACTS FROM OR COPY PORTIONS OF THIS
PUBLICATION WITHOUT SPECIFIC AUTHORITY FROM THE CHIEF OF NAVAL
OPERATIONS, EXCEPT AS PROVIDED FOR IN CURRENT EDITION OF THE REGISTERED
PUBLICATION MANUAL.

6. SPECIAL WARNING-the contents of this publication shall be given
the minimum dissemination compatible with thorough preparation of the
subordinate plans.

P. C. Crosley,                                             H. E. KIMMEL.
P. C. CROSLEY
    Flag Secretary.

Page 492

[ii] U. S. Pacific Fleet Operating Plan-Rainbow Five (Navy Plan O-1,
Rainbow Five)

                    LIST OF EFFECTIVE PAGES-WPPac-46

Subject Matter                          Page Number [1]      Change
                                                            in effect

Promulgating letter CincPac file                          Original
   A16/WPPac-46(16) Serial 056W
   of July 21, 1941.
List of Effective Pages, WP Pac-46      ii                      "
Table of Corrections                    iii                     "
Distribution List                       iv                      "
Title Page                              1                       "
Table of Contents                       2, 2a, 2b               "
Parts I to V (incl.)                    3-52 incl.              "
                                        52a-52h incl.           "
                                        56a-66d incl.           "
                                        57-74 incl.             "
Annex I                                 I-1 to I-11 incl.       "
Annex II                                II-1 to II-9 incl.      "
Annex III                               III-1 to III-5 incl.    "
Annex IV                                IV-1 to IV-3 incl.      "

[1] Pages referred to are indicated by italic figures enclosed by
brackets and represent pages of original exhibit.

[iii]

TABLE OF CORRECTIONS
              Date of
Change No.    Entry       Signature and rank of officer entering change
__________    ________    _____________________________________________
__________    ________    _____________________________________________
__________    ________    _____________________________________________

[iv]                        DISTRIBUTION LIST

                                                                  Regis-
                                                                  tered
Official to Whom Issued                                           Nos.
Chief of Naval Operations                               1, 2, 3, 4, 5, 6
Commander-in-Chief, U. S. Pacific Fleet                             7, 8
Commander-in-Chief, U. S. Atlantic Fleet                               9
Commander-in-Chief, U. S. Asiatic Fleet                           10, 11
Commander, Task Force One (Combatfor)                             12, 13
Commander, Task Force Two (Comairbatfor)                          14, 15
Commander, Task Force Three (Comscofor)                           16, 17
Commander, Battleships Battle Force                                   18
Commander, Battleship Division One                                    19
Commander, Battleship Division Two                                    20
Commander, Cruisers Battle Force                                      22
Commander, Cruiser Division Three                                     23
Commander, Carrier Division One                                       25
Commander, Destroyers Battle Force                                    26
Commander, Destroyer Flotilla One                                     27
Commander, Minecraft Battle Force                                     28
Commander, Cruisers Scouting Force                                    29
Commander, Cruiser Division Five                                      30
Commander, Cruiser Division Six                                       31
Commander, Aircraft Scouting Force                                    32
Commander, Patrol Wing Two                                            33
Commander, Submarines Scouting Force                                  34
Commander, Base Force                                             35, 36
Commanding General, Second Marine Division                            37
Commandant, Naval Station, Samoa                                      38
Commandant, Eleventh Naval District                                   39
Commandant, Twelfth Naval District                                    40
Commandant, Thirteenth Naval District                                 41
Commandant, Fourteenth Naval District                                 42
Commandant, Fifteenth Naval District                                  43
  Commander-in-Chief, U. s. Pacific Fleet is holding registered numbers
21, 24, and 44 to 60 in reserve.

Page 493

                                                                  SECRET
[1]          U. S. PACIFIC FLEET OPERATING PLAN-RAINBOW FIVE
                      (NAVY PLAN O-1, RAINBOW FIVE)

                                 WPPac-46

[2]                         TABLE OF CONTENTS

                       Subject                             Page Nos. [1]
Introduction:
  Chapter I. Navy Basic War Plan (Rainbow Five) ....................   3
  Chapter II. Format of Fleet Plans ................................   4
  Chapter III. Subordinate Plans ...................................   6
  Chapter IV. Mobilization .........................................   8
Part I. Task Organization, Assumptions, Information:
  Chapter I. Task Organization .....................................   9
  Chapter II. Assumptions ..........................................  15
    Section 1. General Assumptions .................................  15
    Section 2. Special Assumption ..................................  16
  Chapter III. Information .........................................  17
    Section 1. General Information .................................  17
    Section 2. Enemy Information ...................................  20
    Section 3. Estimate of Enemy Action ............................  21
Part II. Outline of Tasks:
  Chapter I. Tasks Assigned by Navy Basic Plan,-Mission ............  24
  Chapter II. Tasks Formulated to Accomplish the Assigned Missions .  25
Part III. Task Assignment:
  Chapter I. Phase I ...............................................  28
    Section 1. Task Force One ......................................  28
    Section 2. Task Force Two ......................................  29
    Section 3. Task Force Three ....................................  30
    Section 4. Task Force Nine (Patrol Plane Force) ................  30
    Section 5. Task Force Seven (Undersea Force) ...................  33
    Section 6. Task Force Eight (Mining Force) .....................  34
    Section 7. Task Force Six (Logistic and Control Force) .........  35
    Section 8. Naval Coastal Frontiers .............................  36
    Section 9. Tasks Jointly Applicable ............................  38
[2a]
  Chapter II. Phase IA .............................................  39
    Section 1. Task Force One ......................................  39
    Section 2. Task Force Two ......................................  40
    Section 3. Task Force Three ....................................  41
    Section 4. Task Force Nine (Patrol Plane Force) ................  42
    Section 5. Task Force Seven (Undersea Force)....................  45
    Section 6. Task Force Eight (Mining Force) .....................  48
    Section 7. Task Force Six (Logistic and Control Force)..........  49
    Section 8. Naval Coastal Frontiers .............................  50
    Section 9. Tasks Jointly Applicable ............................  51
  Chapter III. Phases Succeeding Phase IA ..........................  52
    Section 1. Task Force One ......................................  52
    Section 2. Task Force Two ...................................... 52a
    Section 3. Task Force Three .................................... 52b
    Section 4. Task Force Nine (Patrol Plane Force) ................ 52c
    Section 5. Task Force Seven (Undersea Force) ................... 52d
    Section 6. Task Force Eight (Mining Force) ..................... 52e
    Section 7. Task Force Six (Logistic and Control Force) ......... 52f
    Section 8. Naval Coastal Frontiers ............................. 52g
    Section 9. Tasks Jointly Applicable ............................ 52h
  Chapter IV. Execution of the Plan ................................  53
  Chapter V. Initial Transfer of Units .............................  54
Part IV. Logistics:
  Chapter I. General ...............................................  56
  Chapter II. Transportation ....................................... 56a
  Chapter III. Hospitalization and Evacuation ...................... 56b
  Chapter IV. Prize Crews .......................................... 56c
  Chapter V. Salvage ............................................... 56d
Part V. Special Provisions:
  Chapter I. Time to be Used  ......................................  57
  Chapter II. Communications  ......................................  58
  Chapter III. Location of Commander-in-Chief ......................  59
  Chapter IV. Tentative Operations Plans-Phase I and IA ............  60
    Section 1. Phase I .............................................  61
    Section 2. Phase IA ............................................  68
[2b]
Annex I. Patrol and Sweeping Plan .......................... I-1 to I-11
Annex II. Marshall Reconnaissance and Raiding Plan ........ II-1 to II-9
Annex III. Communication Plan ..........................  III-1 to III-5
Annex IV. Command Relationship and Coordination of Activities at
            Outlying Bases ...............................  IV-1 to IV-3

[1] Pages referred to are indicated by italic figures enclosed by
brackets and represent pages of original exhibit.

Page 494

[3]                              SECRET

            U. S. PACIFIC FLEET OPERATING PLAN RAINBOW FIVE
                     (NAVY PLAN O-1, RAINBOW FIVE)

                               INTRODUCTION

            CHAPTER I. NAVY BASIC WAR PLAN (RAINBOW FIVE)

0101. Navy Basic War Plan (Rainbow Five) is the directive which this U.
S. PACIFIC FLEET Operating Plan (Rainbow Five) is designed to implement
in so far as the tasks assigned the U. S. PACIFIC FLEET are concerned.
As the Basic Plan is in the possession of most of the recipients of this
Fleet Plan, only particularly pertinent parts of it will be repeated
herein. These parts have to do chiefly with assumptions, concepts of
enemy action. And tasks.

[4]          CHAPTER I. FORMAT OF FLEET PLANS

0201. This Plan follows the standard War Plan form of WPL-8 except for
small variations made for the purpose of facilitating ready reference
and quick dissemination on the outbreak of war. These, in brief, are as
follows:

a. In Part I the order of presentation is:
    Chapter I-Task Organization.
    Chapter II-Assumptions.
    Chapter III-Information.
b. In Part II are incorporated:
    Chapter I-Task assigned by Basic Plan.
    Chapter II-Phases; and specific tasks, arranged by phases, for
      accomplishing the assigned mission together with (in a few
      instances) decisions as to how they will be initially carried out.

c. In Part III the first three chapters each cover one phase. Within
each of those chapters the tasks assigned to each task force are grouped
in a separate section, except the naval coastal frontiers, which are
grouped together. Pertinent special information and logistic
instructions are placed with the tasks given therein or they are placed
in an appropriate annex of this O-1 Plan. Where a task requires
coordinated action with other task forces, reference is simply made to
the annex which comprises the plan for such coordinated action

d. Sections 1 and 2 of Chapter IV, Part V are tentative fleet operation
plans which, when completed by the assignment of forces actually
available at the time and modified to meet any change in the conditions
which have been visualized in this Fleet War Plan (U. S. Pacific Fleet
Operating Plan-Rainbow Five), are considered suitable, together with the
annexes, for placing into effect the measures of Phase I and Phase IA of
this Plan. In other words Chapter IV, Part V could be omitted as the
material therein is completely covered in the text that precedes: [a]
them. They are included, however, for the sake of clarity and in order
to have immediately available tentative fleet operation plans in the
conventional form with which all concerned are familiar.

e. Annexes I, II, etc., are plans, special plans issued by the
Commander-in-Chief for a particular purpose. They may be made effective
separately if occasion requires. The forces affected are indicated in
the annex itself. Some of the annexes may ultimately be only guides for
promulgation of an operation order by despatch or letter.

f. Supporting plans of subordinate commanders, which are prescribed in
the next chapter, are to be appended as lettered annexes.

[6]           CHAPTER III. SUBORDINATE PLANS

0301. Subordinate plans to support this Fleet Operating Plan will be
prepared as follows:

a. The Commanders of the forces designated in the Task Organization in
Chapter I, Part I of this Plan, will prepare supporting plans for each
assigned task, the accomplishment of which would be facilitated by
further planning.

b. These supporting plans will be, as closely as practicable, in the
standard form of operation plans, and will be incorporated as annexes to
this Fleet Operating Plan. Where the nature of the tasks lends itself to
such procedure, the plan for their accomplishment may be in the form of
a single annex. Where such is not the case, as where tasks are assigned
in one or more of the Commander-in-Chief's annexes, several plans may be
required.

Page 495

c. Letter designations for annexes are assigned to each commander as
listed below. The first annex to be prepared will be designated as
"Letter-1", the second as "Letter-2", etc. It should be noted that if
the nature of a task assigned at present does not require the
preparation of a subordinate plan by a commander, the annex assigned him
below will be vacant.

Task Force One                                 A-1, etc.
Task Force Two                                 B-1, "
Task Force Three                               C-1, "
Aircraft Scouting Force                        D-1, "
Submarines Scouting Force                      E-1, "
Minecraft Battle Force                         F-1, "
Base Force                                     G-l, "
Hawaiian Naval Coastal Frontier                H-1, "
Pacific Southern Naval Coastal Frontier        J-1, "
Pacific Northern Naval Coastal Frontier        K-1, "

d. In the subordinate plans, forces should, in general, be listed in the
task organization by organizations and approximate numbers of types
rather than by name, unless it is known that specific units will be
available.

e. If a commander considers it desirable to disseminate the
considerations which have governed his decision and task assignments, he
should append a brief and sum- [2] marized estimate of the situation as
an addendum to his plan. Auxiliary directives such as communication
plans should also be appended as addenda to the task force commander's
plan.

f. If the execution of the subordinate plans would be facilitated by
still further preliminary planning, task force commanders should require
their group commanders to submit plans for the accomplishment of the
tasks assigned them in the task force commander's plans. These will be
designated as addenda, but will not be incorporated with this Fleet
Plan. They need be submitted only to the task force commander for
acceptance.

g. If appropriate, each subsidiary plan will include in an addendum, the
logistic requirements for carrying out the plan in so far as they can be
foreseen. Such addenda may or may not be incorporated in the Fleet Plan,
but, in every case copies will be supplied to Commander Base Force.

h. The plans must be predicated upon realities and must provide for
maximum possible utilization of forces presently available. Unless
absolutely necessary plans should not be based upon either conceptions
or material not reasonably attainable. When material, equipment or
personnel, not immediately available, is necessary for the successful
execution of the measures to be undertaken, this shall be made the
subject of an addendum. The commander concerned shall take immediate
action to remedy the deficiencies, forwarding necessary correspondence
through the Commander-in-Chief, U. S. Pacific Fleet. Thereafter the
Commander-in-Chief shall be informed of corrections of these
deficiencies as they occur.

i. Task force commanders will employ, in subdividing their forces, the
decimal system of numbering subdivisions.

j. In numbering the pages of the plans which form annexes of this Fleet
Plan, lower case letters to correspond to the letters assigned in
subparagraph c above will be used. Thus the first page of the plan of
Commander Task Force One will be "a-1".

[8]             CHAPTER IV. MOBILIZATION

0401. At the date of issue of this plan, the U. S. Pacific Fleet has
virtually mobilized, and is operating, with intensive security measures,
from the Pearl Harbor base. It is expected, therefore, that the major
portion of the Fleet can be ready for active service within four days of
an order for general mobilization. To provide for the contingency of M-
day being set prior to the date on which hostilities are to open, the
day of execution of this Plan is designated throughout the Plan as W-
day. The day that hostilities open with Japan will be designated J-day.
This may or may not coincide with W-day.

[9]    PART I. TASK ORGANIZATION, ASSUMPTIONS, INFORMATION

               CHAPTER I. TASK ORGANIZATION

1101. The forces available to the Pacific Fleet are listed in the
current Appendix II of the Basic Plan. In addition, the Commanders of
the Pacific Southern Pacific Northern, and Hawaiian Naval Coastal
Frontiers, and the Commandants

Page 496

of the Naval Stations Guam and Samoa are considered to be officers of
the U. S. Pacific Fleet, and, through them, the local defense and
coastal forces are subject to the orders of the Commander-in-Chief.

1102. For planning purposes, tasks are assigned to the commanders of the
current task forces in the Fleet and to certain other commanders who are
to become task force commanders as indicated in paragraph 1107 below.

1103. As of July 1, 1941, the major task forces, their commanders, and
their broad tasks for which they are training, are as follows:

Task Force One.-for covering operations-Commander Battle Force in
command.

Task Force Two.-for reconnaissance in force and raiding operations-
Commander Aircraft Battle Force in command.

Task Force Three.-for landing attack operations-Commander Scouting
Force in command.

1104. The subdivision of the Fleet which is made in paragraph 1107 below
is designed to provide a flexible overall task organization from which
may be drawn the task forces to accomplish the operations which can be
visualized at this time. It must be realized that for most operations,
certain units must be transferred between task forces, some will be
absent in the navy yard or for other reasons, and, in some cases, two or
more task forces will be merged under the command of the senior officer
concerned. Also many of the tasks assigned to a task force in this plan
do not require the employment of the whole task force. In such cases
the task force commander will utilize such units of his force as are
required to accomplish the assigned task.

[10]           CHAPTER I. TASK ORGANIZATION

1105. It is not expected that the Task Organization as shown below will
be effective throughout the campaign. Rather it will be the basis for
making up particular task organizations for the various operations that
may be required. It will be the specific plans and orders in effect at
any given time which will show the task organizations at that time.

1106. Units assigned to a task force or to a task group in the normal
organization that are subsequently assigned to another task force or
task group will thereafter continue as an integral part of the last
organization to which assigned until released by the commander thereof.
The commanders mentioned will release such units as promptly as the
situation at the time permits when the period of assignment to their
commands has terminated or when further reassignment is made by
competent authority.

[11]  1107. The Normal Task Organization for this Plan is as follows:

1. TASK FORCE ONE Commander Battle Force
   Batdivs 2, 4 .......................................... 6 BB
   SARATOGA .............................................. 1 CV
   Crudivs 3, 9 .......................................... 5 CL
   Desflot 1 less Desrons 5, 9 ........................... 4 OCL#
                                                           2 DL
                                                          16 DD#
                                                           2 AD
(#Includes Southeast Pacific Force of 2 OCL and 4 DD.)

2. TASK FORCE TWO Commander Aircraft Battle Force
    Batdiv 1 ............................................  3 BB
    Cardiv 2 less YORKTOWN ..............................  1 CV
    Crudiv 5 ............................................  4 CA#
    Desflot 2 less Desrons 4, 8 and Desdiv 50 ...........  1 OCL
                                                           8 DD
                                                           2 AD
(#Includes Atlantic Reinforcement of 4 CA.)

3. TASK FORCE THREE Commander Scouting Force
   Crudivs 4, 6 .........................................  8 CA
   Cardiv 1 less SARATOGA ...............................  1 CV
   Desrons 4, 5 .........................................  2 DL
                                                          16 DD
   Minron 3, less Mindivs 5, 6 ..........................  5 DM
   Available Transports Base Force ...................... -- AP
                                                          -- APD
   2d Marine Div less Defense Batt.
   2d Marine Air Group.

Page 497

[12]
4. TASK FORCE NINE (Patrol Plane Force) Commander Aircraft Scouting
   Force
   All units of Aircraft Scouting Force ................. 107 VP
                                                            2 AV
                                                            2 AVP
                                                            4 AVD
   Utility Squadron from Base Force .....................  10 VJR

5. TASK FORCE SEVEN (Undersea Force) Commander Submarines Scouting
   Force
   All units of Submarines Scouting Force except
       Sound School .....................................  30 SS
                                                            2 OSS
                                                            1 SM
                                                            1 ODD
                                                            3 AS
                                                            2 ASR
                                                            1 AM

6. TASK FORCE EIGHT (Mining Force) Commander Minecraft Battle Force
   All units of Minecraft Battle Force ..................   1 CM
                                                            8 DM
7. TASK FORCE SIX (Logistic & Control Force) Commander Base Force
   All units of Base Force except AP, APD and Minron 3 ..   8 DMS
     less Divs 5 and 6 and 10 VJ.                           4 AF
                                                            6 AT
                                                            1 AH
                                                           13 AO
                                                            2 AR
                                                            1 ARD
                                                            2 AK
                                                            2 AE
                                                            1 AKS
                                                           10 AM
                                                            4 AG
                                                              Utility
                                                                 Wing
[13]
8. TASK FORCE FOUR (Hawaiian Naval Coastal Frontier) Commandant,
Fourteenth Naval District.
   Local defense forces.

9. TASK FORCE FIVE (Pacific Southern Naval Coastal Frontier) Commandant,
Twelfth Naval District.
   Coastal and local defense forces.

10. TASK FORCE TEN (Pacific Northern Naval Coastal Frontier) Commandant,
Thirteenth Naval District.
    Local defense forces.

[14]

1108. The Southeast Pacific Force and the Atlantic Reinforcement,
composed as indicated above, will operate under the Commander-in-Chief,
U. S. Pacific Fleet until specifically detached by the Chief of Naval
Operations. They will not, however, be sent to such distances from Pearl
Harbor as would prevent their arrival in the Canal Zone twenty-one days
after their transfer is ordered.

[15]             CHAPTER II. ASSUMPTIONS

Section 1. General Assumptions

1211. The general assumptions on which this Plan is based are:

a. That the Associated Powers, comprising initially the United States,
the British Commonwealth, (less Eire), the Netherlands East Indies, the
Governments in Exile, China, and the "Free French" are at war against
the Axis powers, comprising either:

    1. Germany, Italy, Roumania, Hungary, Bulgaria, or

    2. Germany, Italy, Japan, Roumania, Hungary, Bulgaria, and Thailand.

    Note. As of 22 June war exists between the European Axis and Russia,
    and the latter may be tentatively considered as an ally against that
    part of the Axis but not necessarily against Japan

Page 498

b. That even if Japan and Thailand are not initially in the war, the
possibility of their intervention must be taken into account.

c. That Latin American Republics will take measures to control
subversive elements, but will remain in a non-belligerent status unless
subject to direct attack; in general, the territorial waters and land
bases of these Republics will be available for use by United States
forces for purposes of Hemisphere Defense.

d. That the principal military effort of the Associated Powers will be
in the Atlantic and European Areas, and that operations in other areas
will be so conducted as to facilitate that effort. Therefore, transfer
of units from the Pacific Fleet to the Atlantic Fleet is provided for in
the Navy Basic Plan, and additional transfers may become necessary.

e. That the Asiatic Fleet will not be reinforced by the Pacific Fleet,
but that eventually, if Japan enters the war, heavy British
reinforcements will be made in the Far East.

[16]  Section 2. Special Assumption

1221. That the Pacific Fleet is virtually mobilized and is based at
Pearl Harbor, but regular navy yard overhauls are in progress which
would reduce forces immediately available by about one-fifth.

[17]            CHAPTER III. INFORMATION

Section 1. General Information

1311. a. The Pacific Area, which is under the command of the Commander-
in Chief, Pacific Fleet, is that part of the area of the Pacific Ocean:
   1. North of Latitude 30  North and west of Longitude 140  East
   2. North of the equator and east of Longitude 140  East.
   3. South of the equator and east of Longitude 180  to the South
      American Coast and Longitude 74  West.
   4. Less waters in which Canada may assume strategic direction of
      military forces.

b. In addition, the United States will afford support to British Naval
Forces in the regions south of the equator, as far west as Longitude
155  East.

c. The Southeast Pacific Sub-Area, when established, will be that part
of the Pacific Area south of the Panama Naval Coastal Frontier and
between the West Coast of South America and approximately Longitude 95
West.

d. The Pacific Southern Naval Coastal Frontier includes the coastal zone
extending from the northern boundary of California to the southern
boundary of Mexico.

e. The Pacific Northern Naval Coastal Frontier includes the coastal zone
of the Northwestern United States north of the northern boundary of
California, and, in addition, Alaska.

f. The Pacific sector of the Panama Naval Coastal Frontier includes the
coastal zone defined to be within a broken line drawn from the Mexico-
Guatemala boundary to a point in Latitude 5  South, Longitude 95  West
and thence to the Peru-Ecuador border, and to include the sea routes
near the southern and western borders of that zone.

[18]  g. The Hawaiian Naval Coastal Frontier consists of Oahu, and all
the land and sea areas required for the defense of Oahu. The coastal
zone extends to a distance of 500 miles from all the Hawaiian Islands,
including Johnston and Palmyra Islands and Kingman Reef.

h. The Far East Area is defined as the area from the coast of China in
Latitude 30  North, east to Longitude 140  East, thence south to the
equator, thence east to Longitude 141  East, thence south to the
boundary of Dutch New Guinea on the south coast, thence westward to
Latitude 11  South, Longitude 120  East, thence south to Latitude 13
South, thence west to Longitude 92  East, thence north to Latitude 20
North, thence to the boundary between India and Burma.

i. In the Far East Area, responsibility for the strategic direction of
the naval forces of the Associated Powers, except of naval forces
engaged in supporting the defense of the Philippines will be assumed by
the British Naval Commander-In-Chief, China. The Commander-in-Chief,
United States Asiatic Fleet, will be responsible for the direction of
naval forces engaged in supporting the defense of the Philippines.

j. The Australia and New Zealand Area comprises the Australian and New
Zealand British Naval Stations west of Longitude 180  and south of the
equator. The British Naval Commander-in-Chief, China, is responsible for
the strategic direction of the naval forces of the Associated Powers
operating in this Area.

Page 499

1312. The foregoing delineation of principal areas and the agreements as
to cooperation between the United States and the British Commonwealth
are contained in the Report of United States-British Staff Conversations
(ABC-1).Joint United States-Canada War Plan No. 2 (ABC-22) is now in the
process of preparation. Similar agreements with the Netherlands East
Indies are being made.

[19] 1313. The following principles of command will obtain:

a. As a general rule, the forces of the United States and those of the
United Kingdom should operate under their own commanders in the areas of
responsibility of their own Power.

b. The assignment of an area to one Power shall not be construed as
restricting the forces of the other Power from temporarily extending
appropriate operations into that area, as may be required by particular
circumstances.

c. The forces of either Power which are employed normally under the
strategic direction of an established commander of the other, will, with
due regard to their type, be employed as task forces charged with the
execution of specific strategic tasks. These task forces will operate
under their own commanders and will not be distributed into small bodies
attached to the forces of the other Power. Only exceptional military
circumstances will justify the temporary suspension of the normal
strategic tasks.

d. When units of both Powers cooperate tactically, command will be
exercised by that officer of either Power who is the senior in rank, or
if of equal rank, of time in grade.

e. United States naval aviation forces employed in British Areas will
operate under United States Naval command, and will remain an integral
part of United States Naval task forces. Arrangements will be made for
coordination of their operations with those of the appropriate Coastal
Command groups.

1314. The concept of the war in the Pacific, as set forth in ABC-1 is as
follows:

    Even if Japan were not initially to enter the war on the side of the
    Axis Powers, it would still be necessary for the Associated Powers
    to deploy their forces in a manner to guard against Japanese
    intervention. If Japan does enter the war, the military strategy in
    the Far East will be defen- [20] sive. The United States does not
    intend to add to its present military strength in the Far East but
    will employ the United States Pacific Fleet offensively in the
    manner best calculated to weaken Japanese economic power and to
    support the defense of the Malay barrier by diverting Japanese
    strength away from Malaysia. The United States intends to so augment
    its forces in the Atlantic and Mediterranean areas that the British
    Commonwealth will be in a position to release the necessary forces
    for the Far East.

Section 2. Enemy Information

1321. Information of the enemy will be disseminated prior to and on the
execution of this Plan, by means of intelligence reports.

1322. Information which is of special interest with respect to a
specific task is included with that task in Part III or in the Annexes.

[21]  Section 3. Estimate of Enemy Action

1331. It is believed that German and Italian action in the Pacific will
be limited to commerce raiding with converted types, and possibly with
an occasional pocket battleship or heavy cruiser.

1332. It is conceived that Japanese action will be as follows:

a. The principal offensive effort to be toward the eventual capture of
Malaysia (including the Philippines) and Hong Kong.

b. The secondary offensive efforts to be toward the interruption of
American and Allied sea communications in the Pacific, the Far East and
the Indian Ocean, and to accomplish the capture of Guam and other
outlying positions.

c. The offensive against China to be maintained on a reduced scale only.

d. The principal defensive efforts to be:
   1. Destruction of threatening naval forces.
   2. Holding positions for their own use and denying positions in the
      Central and Western Pacific and the Far East which may be suitable
      for advanced bases.
   3. Protecting national and captured territory and approaches.

1333. To accomplish the foregoing it is believed that Japan's initial
action will be toward:

a. Capture of Guam.

b. Establishment of control over the South China Sea, Philippine waters,
and the waters between Borneo and New Guinea, by the establishment of
advanced bases,

Page 500

and by the [22] destruction of United States and allied  air and naval
forces in these regions, followed by the capture of Luzon.

c. Capture of Northern Borneo.

d. Denial to the United States of the use of the Marshall-Caroline-
Marianas area by the use of fixed defenses, and, by the operation of air
forces and light naval forces to reduce the strength of the United
States Fleet.

e. Reinforcement of the Mandate Islands by troops, aircraft and light
naval forces.

f. Possibly raids or stronger attacks on Wake, Midway and other outlying
United States positions.

1334. The initial Japanese deployment is therefore estimated to be as
follows:

a. Troops and aircraft in the Homeland, Manchukuo, and China with strong
concentrations in Formosa and Hainan, fairly strong defenses in the
Carolines, and comparatively weak but constantly growing defenses in the
Marshalls.

b. Main fleet concentration in the Inland Sea, shifting to a central
position (possibly Pescadores) after the capture of Guam and the
reinforcement of the Mandates.

c. A strong fleet detachment in the Mindanao-Celebes area (probable main
base in Halmahera).

d. Sufficient units in the Japan Sea to counter moves of Russian Naval
forces in that area.

e. Strong concentration of submarines and light surface patrol craft in
the Mandates, with such air scouting and air attack units as can be
supported there.

f. Raiding and observation forces widely distributed in the Pacific, and
submarines in the Hawaiian Area.

[23]

g. Obsolete and weaker units on patrol of coastal areas and focal areas
of lines of communication.

h. Merchant ships in neutral ports or proceeding home via detours wide
of usual routes.

[24]                PART II. OUTLINE OF TASKS
        CHAPTER I. TASKS ASSIGNED BY NAVY BASIC PLAN-MISSION

2101. The Navy Basic War Plan (Rainbow Five) assigns the following tasks
within the Pacific Area to the U. S. Pacific Fleet:

a. Support the forces of the associated powers in the Far East by
diverting enemy strength away from the Malay Barrier, through the denial
and capture of positions in the Marshalls, and through raids on enemy
sea communications and positions;

b. Prepare to capture and establish control over the Caroline and
Marshall Island area, and to establish an advanced fleet base in Truk;

c. Destroy axis sea communications by capturing or destroying vessels
trading directly or indirectly with the enemy;

d. Support British naval forces in the area south of the equator as far
west as longitude 155  east;

e. Defend Samoa in category "D";

f. Defend Guam in category "F";

g. Protect the sea communications of the associated powers by escorting,
covering, and patrolling as required by circumstances, and by destroying
enemy raiding forces;

h. Protect the territory of the associated powers in the Pacific area
and prevent the extension of enemy military power into the Western
Hemisphere by destroying hostile expeditions and by supporting land and
air forces in denying the enemy the use of land positions in that
hemisphere;

i. Cover the operations of the naval coastal frontier forces;

j. Establish fleet control zones, defining their limits from time to
time as circumstances require;

k. Route shipping of associated powers within the fleet control zones.

[26]  CHAPTER II. TASKS FORMULATED TO ACCOMPLISH THE ASSIGNED MISSIONS

2201. It will be noted that the tasks assigned in the previous chapter
are based upon Assumption a2 of paragraph 1211 (Japan in the war). In
formulating tasks the Commander-in-Chief has provided also for
Assumption a1 and divides the tasks to be accomplished by the Pacific
Fleet into phases, as follows:

a. PHASE I-Initial tasks-Japan not in the war.

b. PHASE IA-Initial tasks-Japan in the war.

c. PHASE II, etc.-Succeeding tasks.

Page 501

2202. Phase I tasks are as follows:

a. Complete mobilization and prepare for distant operations; thereafter
maintain all types in constant readiness for distant service.

b. Maintain fleet security at bases and anchorages and at sea.

e. Transfer the Atlantic reinforcement, if ordered.

d. Transfer the Southeast Pacific Force, if ordered.

e. Assign twelve patrol planes and two small tenders to Pacific Southern
and a similar force to Pacific Northern Naval Coastal Frontier, on M-
day.

f. Assign two submarines and one submarine rescue vessel to Pacific
Northern Naval Coastal Frontier on M.day.

g. Protect the communications and territory of the associated powers and
prevent the extension of enemy military power into the Western
Hemisphere by patrolling with light forces and patrol planes, and by the
action of striking groups as necessary. In so doing support the British
Naval Forces south of the equator as far west as Longitude 155  East.

h. Establish defensive submarine patrols at Wake and Midway.

[26]

2202. i. Observe, with submarines outside the three mile limit, the
possible raider bases in the Japanese mandates, if authorized at the
time by the Navy Department.

j. Prosecute the establishment and defense of subsidiary bases at Midway
Johnston, Palmyra, Samoa, Guam and Wake, and at Canton if authorized.

k. Continue training operations as practicable.

l. Move the maximum practicable portion of second Marine Division to
Hawaii for training in landing operations.

m. Guard against surprise attack by Japan.

                               Phase IA

2203. Phase IA tasks are as follows:

a. Continue tasks outlined in 2202 a, b, g, h, and k.

b. Accomplish such of the tasks in 2202 e, d, e, f, and j as have not
been completed.

c. Make an initial sweep for Japanese merchantmen and enemy raiders and
tenders in the northern Pacific.

d. Continue the protection of the territory and communications of the
associated powers, and of the naval coastal frontier forces, chiefly by
covering operations.

e. 1. Make reconnaissance and raid in force on the Marshall Islands.
   2. If available cruisers and other circumstances permit, make cruiser
      raids against Japanese shipping in waters between Hansei Shoto and
      Nanpo Shoto.

f. Establish and maintain maximum practicable submarine patrols against
Japanese forces and communications near the Japanese homeland.

g. Maintain air patrols against enemy forces in the approaches to Oahu
and outlying bases.

[27]

2203. h. Escort important shipping, including troop movements, between
the Hawaiian area and the West Coast.

i. Route shipping in the fleet control zone when established.

j. Augment the local defense forces of the Hawaiian Naval Coastal
Frontier as necessary.

k. Move from San Diego to Hawaii the remaining units and equipment of
the Second Marine Division.

l. Prepare to capture and establish control over the Marshall Island
Area.

                    Phase II and subsequent phases

2204. Tasks of Phase II and Subsequent Phases which can be formulated at
this time are:

a. Capture and establish a protected fleet anchorage in the Marshall
Island area.

b. Capture or deny other positions in the Marshall Island Area as
necessary for further advance to the westward.

c. Raid other Japanese land objectives and sea communications.

d. Capture and establish an advanced fleet base at Truk.

e. Continue uncompleted tasks of Phase IA.

Page 502

[28]                    PART III. TASK ASSIGNMENT

                             CHAPTER I. PHASE I

Section 1. TASK FORCE ONE

3111. Task Force One will perform tasks as required by the following
paragraphs of this section.

3112. When directed release two stall light cruisers and one destroyer
division to become the Southeast Pacific Force as required by the navy
basic plan.

3113. Perform the tasks assigned in the patrol and sweeping plan (Annex
I).

[29]

Section 2. TASK FORCE TWO

3121. Task Force Two will:

Perform the tasks assigned in the patrol and sweeping plan (Annex I).

[30]

Section 3. TASK FORCE THREE

3131. Task Force Three will perform the tasks assigned in the following
paragraphs of this section.

3132. Perform the tasks assigned in the Patrol and Sweeping Plan (Annex
I).

3133. a. Move from San Diego to Hawaii the maximum practicable portion
         of the Second Marine Division, employing attached transports.
      b. Make preparations and train for landing attacks on Japanese
         bases in the Marshalls for purposes of capture or demolition,
         with particular emphasis on plan for capture of Eniwetok.

c. 1. Special Information

As of July 1, 1941, the Marine defenses in Hawaii and the outlying
islands are as follows:

         MIDWAY -34 officers
                 750 men
                 6 5"/51 caliber guns
                 12 3"/50 caliber AA guns
                 30 0.50 caliber machine guns
                 30 0.30 caliber machine guns
                 4 searchlights.
        JOHNSTON-18 men
                 2 5"/51 caliber guns
                 4 0.30 caliber machine guns
         PALMYRA-4 officers
                 101 men
                 4 5"/51 caliber guns
                 4 3"/50 caliber AA guns
                 4 0.50 caliber machine guns
                 4 0.30 caliber machine guns
[31]

            OAHU-32 officers
                 620 men
                 4 5"/51 caliber guns
                 8 3"/50 caliber AA guns
                 20 0.50 caliber machine guns
                 16 0.30 caliber machine guns
                 NOTE: The above personnel are defense battalion
                   personnel only and are in addition to personnel
                   employed in guard duty, barracks duty, etc.
             WAKE-None.

2. Task

Furnish additional defenses for outlying bases as may be requested by
the Commander Hawaiian Naval Coastal Frontier and approved by the
Commander-in-Chief.

[32]

Section 4. TASK FORCE NINE (PATROL PLANE FORCE)

3141. Task Force Nine will perform the tasks assigned in the following
paragraphs of this section.

3142. On W-day transfer twelve patrol planes and two tenders to each of
the Pacific Southern and Pacific Northern Naval Coastal Frontiers.
Continue administration of these forces and rotate detail at discretion.

3143. Perform tasks assigned in the patrol and sweeping plan (Annex I).

[33]

Section 5. TASK FORCE SEVEN (UNDERSEA FORCE)

3151. Task Force Seven will perform tasks as required by the following
paragraphs of this section.

Page 503

3152. a. Special Information.
      1. There are indications that Axis raiders have been basing in the
         Marshall area.
      2. The imminence of the entry of Japan into the-war requires a
         deployment suitable for this eventuality.
      3. NARWHAL and NAUTILUS are fitted to carry 13,500 gallons of
         aviation gasoline each for fueling patrol planes.

b. Task.
   Maintain patrols required by the patrol and sweeping plan (Annex I).

c. Special Logistics.
   Logistic replenishment at Pearl Harbor and to a limited degree at
   Midway.

3153. Assign one submarine division to Task Force Three as required for
landing attack training.

3154. On W-day transfer two submarines and one submarine rescue vessel
to Pacific Northern Naval Coastal Frontier to assist in defense of the
Alaskan sector. Continue administration of these units and rotate detail
at discretion.

[34]  Section B. TASK FORCE EIGHT (MINING FORCE)

3161. Task Force Eight will:

Continue operations and training under commanders Task Forces One and
Two.

[35]

Section 7. TASK FORCE SIX (LOGISTIC & CONTROL FORCE)

3171. Task Force Six will perform tasks as required by the following
paragraphs.

3172. Provide logistic service to the fleet and cooperate with Commander
Hawaiian Naval Coastal Frontier in providing logistic services to
outlying bases.

3173. Perform tasks required by The Patrol and Sweeping Plan (Annex I).

3174. Maintain in the office of Commander Pacific Naval Coastal Frontier
an officer to maintain liaison with respect to logistic requirements of
the fleet, the loading of base force and NTS vessels, and the routing
and protection of U. S and Allied shipping. Maintain close liaison with
Commander Hawaiian Naval Coastal Frontier for the same purposes.

3175. Transfer ten VJR to Commander Task Force Nine.

[36]

                Section 8. NAVAL COASTAL FRONTIERS

         Task Force Four (Hawaiian Naval Coastal Frontier)

3181. Special Information.

The Basic Plan assigns the following tasks to the Commander; Hawaiian
Naval Coastal Frontier.

a. Defend the Hawaiian Naval Coastal Frontier in Category "D". (Category
"D"-May be subject to major attack). (N. B. The Commander-in-Chief U. S.
Pacific Fleet, does not consider Category "D" will apply during Phase
I.)

b. Protect and route shipping within the Hawaiian Naval Coastal
Frontier.

c. Support the U. S. Pacific Fleet.

d. Support the Army and Associated Forces within the Hawaiian Naval
Coastal Frontier.

3182. By this Fleet Plan, Task Force Four is assigned the tasks below.

a. Assist in providing external security for units of the Fleet in the
Hawaiian Naval Coastal Frontier, in cooperation with the Army and the
units concerned. (As of the date of issue of this plan, the security
plan of the Commander, Hawaiian Naval Coastal Frontier (as Commander,
Base Defense) is already in effect).

b. Prosecute the establishment of subsidiary bases at Midway, Johnston,
Palmyra, and Wake, and at Canton if authorized. Assist as practicable in
the development of Samoa and Guam.

c. Make the facilities of outlying bases available for Fleet units
operating in the vicinity; and directly and through own task group
commanders cooperate with other task force and task group commanders in
coordinating the military activities at these bases. (See Annex IV.)

            U. S. PACIFIC FLEET OPERATING PLAN-RAINBOW FIVE
                     (NAVY PLAN 0-1, RAINBOW FIVE)

                       PART III. TASK ASSIGNMENT

                          CHAPTER 1. PHASE I.

[37]

3182. d. Utilize units of the Fleet Marine Force, made available for the
purpose, to defend Midway, Johnston, and Palmyra, and, when authorized
Wake and Canton.

Page 504

Task Force Five (Pacific Southern) and Task Force Ten (Pacific Northern
                         Naval Coastal Frontier)

3183. Commanders Task Forces Five and Ten perform tasks assigned by the
Patrol and Sweeping Plan (Annex I).

[38]

                  Section 9. TASKS JOINTLY APPLICABLE

3191. Until detached from the Fleet, all forces less those of Naval
Coastal Frontiers will perform the following tasks:

a. Units in the Hawaiian Area complete mobilization at Pearl Harbor by
the end of four W-day; units designated for early operations complete
mobilization prior to the time designated for their operations to
commence. Units on the Pacific Coast complete mobilization there as
rapidly as possible.

b. Maintain vessels of all types in constant readiness for distant
service.

c. Maintain internal and external security of forces at all times,
cooperation with commanders of naval coastal frontiers while within the
limits of those frontiers. Guard against surprise attack by Japanese
forces.

d. Continue such training activities of the fleet as the commander-in-
chief may direct.

e. Reinforce local defense and coastal forces as directed

f. Protect the territory and communications of the associated powers,
the operations of coastal forces, and troop movements by covering and
other operations as directed by the commander-in-chief.

[39]

                         CHAPTER II. PHASE IA

Section 1. TASK FORCE ONE

3211. Task Force One will perform tasks as required by the following
paragraphs of this section.

3212. Perform task assigned in the patrol and sweeping plan (Annex I).

3213. Reinforce and support operations of Task Force Two as required in
the Marshall reconnaissance and raiding plan (Annex II).

[40]

Section 2. TASK FORCE TWO

3221. Task Force Two will perform tasks as required by the following
paragraph.

3222. Conduct reconnaissance and raid in force against the Marshalls as
required in the Marshall reconnaissance and raiding plan (Annex II).

[41]

Section 3. TASK FORCE THREE

3231. Task Force Three will perform tasks as required by the following
paragraphs of this section.

3232. Conduct initial sweep against enemy commerce and raiders as
required in The Patrol and Sweeping Plan (Annex I).

3233. Reinforce Task Force Two as required by the Marshall
Reconnaissance and Raiding Plan (Annex II).

3234. Move from San Diego to Hawaii the remaining units and equipment of
the Second Marine Division and continue training for landing exercises.

3235. Continue task assigned in subparagraph 3133 c, 2.

[42]

Section 4. TASK FORCE NINE (PATROL PLANE FORCE)

3241. Task Force Nine will perform tasks as required in the following
paragraphs of this section.

3242. A. Special Information.

1. Patrol plane operations from Midway, Wake, Johnston, Palmyra, and
Canton are feasible, the extent of such operations being dependent upon
the defenses, facilities and supplies available at the time operations
commence. Those defenses, facilities and supplies are being augmented.
As of July 1, 1941 tenders cannot base at Wake or Canton, but Pan-
American Airways' facilities may be used by special arrangement or by
commandeering. A project for the improvement of Wake as a base is
underway. No such project for Canton has been approved.

2. No aircraft are assigned at present to the Commander, Hawaiian Naval
Coastal Frontier.

3. Our submarines will assist in the defense of Midway and Wake, and
will habitually operate offensively in enemy waters.

Page 505

4. Land defenses exist on outlying islands, as described in paragraph
3133c, 1. Commander Task Force Four (Hawaiian Naval Coastal Frontier) is
charged with the defense of these outlying islands and will make them
available for patrol plane operations.

5. It is believed that enemy action in the area subject to our patrol
plane search will comprise:

(a) Submarine raids and observation off Oahu and outlying islands and
along our lines of communication.

[43]

(b) Surface raids on our lines of communications.

(c) Surface and air raids against Wake and possibly against Midway,
Johnston, Palmyra and Canton.

(d) Possibly carrier raid against Oahu.

b. Tasks.

1. Perform patrols required by patrol and sweeping plan (Annex I).

2. Subject to the specific tasks prescribed elsewhere in this plan,
operate patrol planes in the Hawaiian Area including outlying islands so
as to gain the earliest possible information of advancing enemy forces.
Use them offensively only when other types of our own are not within
striking distance, and the risk of damage to the planes is small; or
when the importance of inflicting damage on the objective appears to
justify the risk of receiving the damage which may result.

3. Coordinate the service of information with the operations of other
forces.

4. Perform tasks assigned in the Marshall reconnaissance and raiding
plan (Annex II).

5. Coordinate operations of patrol planes with submarines operating in
same general area.

6. Withdraw patrol planes from advance bases when necessary to avoid
disproportionate losses.

[44]

3242. b. 7. Maintain not less than two squadrons (one may be VJ Squadron
from base force) based on Oahu at all times. During the absence of major
portions of the fleet from the vicinity of Oahu, such squadrons, at
discretion, may be temporarily transferred to commander Task Force Four
(Hawaiian Naval Coastal Frontier).

c. Special Logistics.

Logistic support at outlying bases will be supplied by own tenders,
Hawaiian Naval Coastal Frontier, Base Force, and, if necessary, by Pan-
American Airways facilities.

[45]   Section 5. TASK FORCE SEVEN (UNDERSEA FORCE)

3251. Task Force Seven will perform tasks as required by the following
paragraph.

3252a 1. Special Information.

1. Surface units of the Fleet will initially conduct the operations
required by the Patrol and Sweeping Plan (Annex I) and the Marshall
Reconnaissance and Raiding Plan (Annex II). Thereafter operations will
be conducted for the capture of the Marshalls and Carolines, with
occasional sweeps toward the Marianas and the Japanese Homeland.

2. Our patrol planes will be operating from Midway, and possibly Wake
and Johnston Islands.

3. Japan is developing extensively the defenses of the Mandated Islands.
Land planes are known to be based at Saipan, Truk and Jaluit and have
been reported at Marcus Island. Air fields are believed to exist at
Wotje and Maloelap. Port Lloyd in the Bonins is a minor operating base
and some aircraft usually base there and at Hachijo Jima. Aircraft may
be present on Amami Oshima.

4. Considerable air strength is based on the Japanese Homeland but it is
believed that, with many commitments elsewhere and a general lack of
patrol planes, the air patrol surrounding the Homeland will not be
particularly intensive.

5. The main units of the Japanese Fleet will probably be operating from
the Inland Sea.

6. All important harbors will probably be mined and netted against
submarines and are well fortified. A considerable number of small patrol
craft must be expected.

[46]

3252. a. 7. The southwestern and western lines of communications from
Japan may be considered vital needs and those toward the Mandates are
very important.

8. It is expected that all Japanese Merchantmen will be armed or will be
operating under naval control, and will therefore be subject to
submarine attack. Specific instructions on this subject will be issued
later.

Page 506

9. Arrangements will be made with the Commander-in-Chief, Asiatic Fleet,
to extend the Pacific Area sufficiently for submarines to pass through
the Nansei Shoto as far south as Latitude 28 -30' N.

10. Mining Japanese waters outside the three mile limit may be planned.
The specific authority for such mining will be issued later.

b. Tasks

1. Continue patrol of two submarines each at Wake and Midway.

2. Establish maximum practicable initial patrol off the Japanese
homeland and thereafter maintain it at the maximum strength permitted by
operating conditions, giving Stations the following priority.
   YOKOHAMA
   BUNGO CHANNEL
   KII CHANNEL
   TSUSHIMA
   NAGASAKI
   SHIMONOSEKI
   TSUGARU

3. Inflict maximum damage on enemy forces including shipping, utilizing
torpedoes and mines, and, if appropriate, gunfire.

[47]

3252. b. 4. Report important enemy movements by radio if success of
attack mission is not thereby jeopardized.

c. Special Logistics.

Utilize facilities at Midway as necessary to increase endurance on
patrol.

[48]

Section 6. TASK FORCE EIGHT (MINING FORCE)

3261. Task Force Eight will:

Report to Commander Hawaiian Naval Coastal Frontier to augment the local
defense forces during this phase.

[49]

Section 7. TASK FORCE SIX (LOGISTIC & CONTROL FORCE)

3271. Task Force Six will:

Continue tasks assigned for Phase I and perform the tasks assigned in
the patrol and sweeping plan (annex I) and the Marshall reconnaissance
and raiding plan (annex II).

[50]

Section 8. NAVAL COASTAL FRONTIERS

3281. Task Force Five (Pacific Northern) and Task Force Ten (Pacific
Southern Naval Coastal Frontier) will:

Continue tasks assigned for phase I and perform the tasks assigned in
the patrol and sweeping plan (annex I).

3282. Task Force Four (Hawaiian Naval Coastal Frontier) will:

Continue tasks assigned for phase I.

[51]

Section 9. TASKS JOINTLY APPLICABLE

3291. All task forces concerned:

a. Continue tasks assigned in paragraph 3191.

b. Perform tasks assigned in the patrol and sweeping plan (annex I).

[52]
            CHAPTER III. PHASES SUCCEEDING PHASE IA

Section 1. TASK FORCE ONE

3311. Task Force One will:

Cover operations of other forces as prescribed in the Eniwetok plan
(annex --), and other plans for the capture of the Marshalls and
Carolines.

[52a]  Section 2. TASK FORCE TWO

3321. Task Force Two will:

Reinforce Task Forces One and Three as required in Eniwetok and other
plans and perform such reconnaissance and raiding as is directed.

[52b]

Section 3. TASK FORCE THREE

3331. Task Force Three will:

a. Continue training for landing attacks.

b. Perform tasks assigned in Eniwetok plan (annex-) and other operations
involving landing attacks.

c. Patrol as directed in subsequent plans.

d. Continue task assigned in subparagraph 3133 c, 2.

Page 507

[52c]

Section 4. TASK FORCE NINE (PATROL PLANE FORCE)

3341. Task Force Nine will:

a. Continue tasks assigned in subparagraphs 3242 b, 2, 3, 5, 6, and 7.

b. Perform tasks assigned in Eniwetok plan (annex --) and other plans for the capture of the Marshalls and Carolines.

[52d]

Section 5. TASK FORCE SEVEN (UNDERSEA FORCE)

3351. Task Force Seven will:

a. Continue tasks assigned in subparagraphs 3252 b, 1, 2, 3, and 4.

b. Carry out tasks assigned in Eniwetok plan (annex --) and other plans
for the capture of the Marshalls and Carolines.

            U. S. PACIFIC FLEET OPERATING PLAN-RAINBOW FIVE
                  (NAVY PLAN O-1, RAINBOW FIVE)

                    PART III. TASK ASSIGNMENT

              CHAPTER III. PHASES SUCCEEDING PHASE IA

[52e]

Section 6. TASK FORCE EIGHT (MINING FORCE)

3361. Task Force Eight will:

Perform such mining tasks as may be assigned in Eniwetok plan (annex-)
and other operations and continue to augment local patrols as directed.

[52f]

Section 7. TASK FORCE SIX (LOGISTIC AND CONTROL FORCE)

3371. Task Force Six will:

a. Continue tasks prescribed in paragraphs 3172 to 3174.

b. Prepare plans for the establishment of a fleet anchorage at Eniwetok
and a fleet base at Truk after the positions have been captured.

[52g]

Section 8. NAVAL COASTAL FRONTIERS

3381. Task Forces Four, Five, and Ten will:

Continue the tasks assigned in paragraphs 3182 and 3183.

[52h]

Section 9. TASKS JOINTLY APPLICABLE

3391. All task forces concerned:

Continue tasks assigned in paragraph 3291.

[53]

              CHAPTER IV. EXECUTION OF THE PLAN

3401. The execution of this Plan may be in one or two steps depending on
whether Japan does or does not become a belligerent on the first day of
execution.

a. If action against European Axis Powers only is to be taken the
dispatch will be "EXECUTE NAVY PLAN OPTION DASH ONE RAINBOW FIVE PHASE
ONE".

b. When action against JAPAN is to be taken the dispatch for execution
will be "EXECUTE NAVY PLAN OPTION DASH ONE RAINBOW FIVE PHASE ONE
AFIRM".

3402. In the event of an overt act of war by a foreign power against the
United States prior to the existence of a state of war, it is the duty
of the senior commander on the spot to take such action in the defense
of his command and the national interests as the situation may require,
and report the action taken to superior authority at once.

[54]
                 CHAPTER V. INITIAL TRANSFER OF UNITS

3501. The table below gives, for ready reference, a summary of the
transfers to be made in going from the current peace time organization
to the task organization as of W-Day and as of J-Day. Those transfers
for W-Day will be made upon the placing into effect of Phase I of this
Plan. Those for J-Day will be made when the execution of Phase IA is
ordered. Units concerned will report by despatch to the commanders of
the task forces to which they are transferring.

Page 508

From               To             Unit Trans- Transfer   Remarks
                                  ferred      effected
------------------------------------------------------------------------
Taskfor 1          Southeastern   2 OCL       W. D.*
                   Pacific For.   1 Desdiv     "
                   Taskfor 3.     1 CL        W-Day      For rotation on
                                                         patrol until
                                                         J-Day
------------------------------------------------------------------------
Taskfor 2          Taskfor 3      1 CA        W-Day      For rotation on
                                                         patrol until
                                                         J-Day
                   Atlantic Reen. 4 CA        W. D.      If Atlantic
                                                         Reen. is
                                                         detached.
------------------------------------------------------------------------
Taskfor 3          Taskfor 2      2 CA        W. D.      If Atlantic
                                                         Reen. is
                                                         detached.
                   PSNCF          12 VPB      W-Day      Administration
                                   1 AVD        "        remains. Units
                                   1 AVP        "        may be rotated.
------------------------------------------------------------------------
Taskfor 9 (Patrol  PNNCF          12 VPB      W-Day      Administration
Plane Force                        1 AVD        "        remains. Units
                                   1 AVP        "        may be rotated.
------------------------------------------------------------------------
Taskfor 7 (Under-  PNNCF           2 SS       W-Day      Administration
sea Force                          1 ASR        "        remains. Units
                                                         may be rotated.
                   Taskfor 3      NARWHAL or    "        Base Samoa. Re-
                                  NAUTILUS               leased on J-Day

[55]
------------------------------------------------------------------------
Taskfor 8 (Minfor) Hawaiian NCF   1 CM        J-Day      Until further
                                  8 DM          "        orders.
------------------------------------------------------------------------
Taskfor 6(Logistic Taskfor 3      1 AO        W-Day      Base Samoa. Re-
and Control For.)                                        leased on J-Day
                                  1 AO        J-Day      For fueling at
                                                         sea ships in
                                                         initial sweep.
                                                         To revert when
                                                         released.
                   Taskfor 2      2 AO          "        For fueling at
                                                         sea ships in
                                                         initial recon-
                                                         naissance of
                                                         Marshalls. To
                                                         revert when re-
                                                         leased.
                   Taskfor 9      10 VJR        "        Until further
                                                         orders.
------------------------------------------------------------------------
All Forces         Hawaiian NCF   As directed  W. D.
                   Taskfor 6      Any ship    Prior to   For escort
                   (Logistic and  passing be- scheduled  duty. To revert
                   and Control    tween West  date of    on completion
                   Force).        Coast and   departure.
                                  Hawaii.
------------------------------------------------------------------------
*When directed.

[56]

                           PART IV. LOGISTICS

                           CHAPTER I. GENERAL

4101. Commander Task Force Six (Logistics and Control Force) is charged
with the logistic supply of the Fleet and, in cooperation with Commander
Task Force Four (Hawaiian Naval Coastal Frontier), with supplying the
present outlying bases in the Mid Pacific. He will make requests for
replacements as required by paragraph 4322 g of the Navy Basic Plan. He
will maintain a liaison officer in the office of Commander Task Force
Five (Pacific Southern Naval Coastal Frontier) and, through him, will
control the quantities and times of delivery of material and personnel
requirements to the Fleet. In so far as practicable, a reserve of
consumable supplies will be established and maintained at Pearl Harbor.
After capture of bases in the MARSHALLS and CAROLINES a reserve of
supplies will be maintained at these places, as permitted by storage and
transportation facilities available.

4102. The supply of units of the Second Marine Division after they have
left the West Coast will be included with that of the Fleet.

4103. Special logistic instructions affecting particular tasks have been
included in the task assignments in Part III and the Annexes of this
Plan.

4104. For the benefit of Commander Task Force Six, Commanders of other
task forces will include, in the plans which they prepare, their
logistic requirements as far as they can be foreseen.

4105. The requirements of the U. S. Pacific Fleet are placed in the
second highest priority classification by paragraph 4261 of the Navy
Basic Plan.

[56a]

                    CHAPTER II. TRANSPORTATION

4201. Commander Task Force Six (Logistics and Control Force), through
his liaison officer in the office of Commander Task Force Five (Pacific
Southern Naval Coastal Frontier), will coordinate the transportation of
material and personnel by Fleet transportation facilities and the Naval
Transportation Service.

4202. The Naval Transportation Service vessels assigned to assist in the
supply of the Hawaiian and Alaskan areas will be shown in a revised
Chapter IX,

Page 509

Appendix II, of the Navy Basic Plan. If practicable, they will not be
employed or transportation farther westward than Hawaii.

4203. The employment of commercial vessels to assist in transportation
from the West Coast to Hawaii is most desirable and is acceptable to the
Commander-in-Chief, U. S. Pacific Fleet.

[56b]       CHAPTER III. HOSPITALIZATION AND EVACUATION

4301. The facilities of the Fleet including those of hospital ships,
advanced base hospitals and mobile medical units will, as far as
practicable, provide hospitalization for sick and wounded personnel.

4302. As necessary, such personnel will, under the coordinated
supervision of he task force commanders responsible for the personnel
and for the transportation facilities employed, be evacuated to the
nearest shore establishment having hospital space available.

4303. The ships concerned will furnish hospitalization to embarked Army
forces until ineffectives can be transferred ashore.

[56c]

                      CHAPTER IV. PRIZE CREWS

4401. The Navy Department will furnish prize crews as follows: U. S.
Pacific Fleet-8, Southeast Pacific Force-8. If those for the Pacific
Fleet are available they will be placed aboard ships assigned to make
the search for enemy merchant ships in the Patrol and Sweeping Plan
(Annex I).

[56d]

                        CHAPTER V. SALVAGE

4501. All units, particularly of Task Force Six (Logistic and Control
Force) and suitable units of Task Force Seven (Underseas Force) will
render salvage service, as practicable, to naval and other vessels in
the Pacific Area outside of a zone lying 500 miles from the continental
United States, Alaska, and Panama. Within the above mentioned zone,
salvage service will be rendered by the shore establishment.

[57]

                    PART V. SPECIAL PROVISIONS

                    CHAPTER I. TIME TO BE USED

5101. GREENWICH Civil Time will be used in carrying out this Plan.

[58]

                    CHAPTER II. COMMUNICATIONS

5201. Communications will be in accordance with USF-70 as modified by
Annex III to this Plan.

[59]

              CHAPTER III. LOCATION OF COMMANDER-IN-CHIEF

5301. The Fleet will be kept informed of the location of the Commander-
in-Chief.

[60]

          CHAPTER IV. TENTATIVE OPERATION PLANS-PHASES I AND IA

5401. Tentative Operation Plans Nos. 1-R5 and 1A-R5 as formulated below
are designed to facilitate the promulgation and execution of the tasks
assigned for Phases I and IA of this U. S. Pacific Fleet Operating Plan
(Rainbow Five). It is expected that they will be modified and executed
by dispatch when the corresponding Phase of this O-1 Plan is placed in
effect as prescribed in paragraph 3401.

[61]

Section 1. Phase I

                                         United States Pacific Fleet
                                         U. S. S. PENNSYLVANIA, Flagship
                                         Place
                                         Date

Operation Plan No. 1-R5

                      Initial Task Organization

(See paragraph 1107 of this Plan for normal organization)

(a) Task Force One-Commander Battle Force.-Normal units this task force
plus 1/2 minecraft less 1 cruiser in rotation to Task Force Three patrol
pool.

Page 510

(b) Task Force Two-Commander Aircraft, Battle Force.-Normal units this
task force plus 1/2 minecraft less one cruiser in rotation to Task Force
Three patrol Pool.

(c) Task Force Three-Commander Scouting Force.-Normal units this task
force plus 1 cruiser each from Task Forces One and Two for cruiser
patrol pool plus 1 SS from Task Force Seven, 1 AO from Task Force Six,
and (on request) 1 patron and tender from Task Force Seven for South
Pacific operations.

(d) Task Force Nine (Patrol Plane Force) (S. O. P. Airscofor Hawaiian
Area).-Normal units this task force less 24 VP and tenders transferred
to Naval Coastal Frontiers, and (if requested by Commander Task Force
Three) 1 patron and tender to Task Force Three.

[62]

(e) Task Force Seven (Undersea Force)-Commander Submarines Scouting
Force.-Normal units this task force less 2 SS and 1 ASR to Task Force
Ten and 1 SS to Task Force Three.

(f) Task Force Eight (Mining Force).-Non-operative as such; normal units
thereof being divided between Task Forces One and Two.

(g) Task Force Six (Logistic and Control Force)-Commander Base Force.-
Normal units this task force plus any units transferred from other
forces for escort duty West Coast-Hawaii less 1 AO to Task Force Three.

(h) Task Force Four (Hawaiian Naval Coastal Frontier)-Commandant
Fourteenth Naval District.-Normal units this task force plus units from
other fleet forces when and if the Commander-in-Chief directs transfer.

(i) Task Force Five (Pacific Southern Naval Coastal Frontier)-Commandant
Twelfth Naval District.-Normal units this task force plus 12 VP and
tender from Task Force Nine.

(j) Task Force Ten (Pacific Northern Naval Coastal Frontier)-Commandant
Thirteenth Naval District.-Normal units this task force plus 12 VP and
tender from Task Force Nine plus 2 SS and 1 ASR from Task Force Seven

[63]

1. Information, Assumptions, etc., as previously given in Parts I, II
and III of Navy Plan O-1, Rainbow Five.

2. This Fleet will, in the Pacific Area, protect the territory and sea
communications of the Associated Powers and will support British Naval
Forces south of the equator as far west as Longitude 155  East, while
continuing training and guarding against attack by Japan.

3. (a) Task Force One-
      (1) When directed release two small light cruisers and one
      destroyer division to become the Southeast Pacific Force as
      required by the Navy Basic Plan.
      (2) Perform the task assigned in the Patrol and Sweeping Plan
      (Annex I)

(b) Task Force Two.-(1) Perform the tasks assigned in the Patrol and
Sweeping Plan (Annex I)

(c) Task Force Three.-
    (1) Maintain the patrols required by the Patrol and Sweeping Plan
    (Annex I).
    (2) Move from San Diego to Hawaii the maximum practicable portion of
    the Second Marine Division, employing attached transports.
    (3) Make preparations and train for landing attacks on Japanese
    bases in the Marshalls for purposes of capture or demolition, with
    particular emphasis on plan for capture of Eniwetok.

[64]

    (4) Furnish additional defenses for outlying bases as may be
    requested by Commander Hawaiian Naval Coastal Frontier and approved
    by the Commander-in-Chief.

(d) Task Force Nine (Patrol Plane Force).-
    (1) Transfer twelve patrol planes and two tenders to each of the
    Pacific Southern and Pacific Northern Naval Coastal Frontiers.
    Continue administration of these forces and rotate detail at
    discretion.
    (2) Perform tasks assigned in the Patrol and Sweeping Plan
    (Annex I).

(e) Task Force Seven (Undersea Force).-
    (1) Maintain patrols required by the Patrol and Sweeping Plan
    (Annex I).
    (2) Assign one submarine division to Task Force Three as required
    for landing attack training.
    (3) Transfer two submarines and one submarine rescue vessel to
    Pacific Northern Naval Coastal Frontier to assist in defense of the
    Alaska sector. Continue administration of these units and rotate
    detail at discretion.

(f) Task Force Eight (Mining Force).-
    (1) Continue training under Commander Task Force One.

(g) Task Force Six (Logistic and Control Force).-
    (1) Provide logistic services to the Fleet and cooperate with
    Commander Hawaiian Naval Coastal Frontier in providing logistic
    services to outlying bases.

Page 511

[65]

    (2) Perform tasks required by the Patrol and Sweeping Plan (Annex I)
    (3) Maintain in the Office of Commander Pacific Naval Coastal
    Frontier an officer to maintain liaison with respect to logistic
    requirements of the Fleet, the loading of Base Force and Naval
    Transportation Service vessels, and the routing and protection of
    United States and Allied shipping. Maintain close liaison with
    Commander Hawaiian Naval Coastal Frontier for the same purposes.

(h) Task Force Four (Hawaiian Naval Coastal Frontier).-
    (1) Assist in providing external security for units of the Fleet in
    the Hawaiian Naval Coastal Frontier, in cooperation with the Army
    and the units concerned.
    (2) Prosecute the establishment of subsidiary bases at Midway,
    Johnston, Palmyra, and Wake, and at Canton is authorized. Assist as
    practicable in the development of Samoa and Guam.
    (3) Make the facilities of the outlying bases available for Fleet
    units operating in the vicinity and cooperate with Commanders of
    Mobile Forces in coordinating the military activities at these
    bases. (See Annex IV).
    (4) Utilize units of the Fleet Marine Force, made available for the
    purpose to defend Midway, Johnston, and Palmyra, and, when
    authorized, Wake and Canton.

(i) Task Force Five (Pacific Southern Naval Coastal Frontier).-
    (1) Perform tasks assigned by the Patrol and Sweeping Plan
    (Annex I).

[66]

(j) Task Force Ten (Pacific Northern Naval Coastal Frontier).-
    (1) Perform tasks assigned by Patrol and Sweeping Plan (Annex I).
(X) (1) Units in the Hawaiian area complete mobilization at Pearl Harbor
    within four days of date of execution of this Plan; units designated
    for early operations complete mobilization prior to the time
    designated for their operations to commence. Units on the Pacific
    Coast complete mobilization there as rapidly as possible.
    (2) Maintain vessels of all types in constant readiness for distant
    service.
    (3) Maintain internal and external security of forces at all times,
    cooperating with the Commanders of Naval Coastal Frontiers while
    within the limits of those frontiers. Guard against surprise attack
    by Japanese Forces.
    (4) Continue such training activities of the-Fleet as the Commander-
    in-Chief may direct.
    (5) Reinforce local defense and coastal forces as directed.
    (6) Protect the territory and communications of the Associated
    Powers, the operations of coastal forces, and troop movements by
    covering and other operations as directed by the Commander-in-Chief.

4. Logistic replenishment at Pearl Harbor, on the West Coast, and as
specially provided for in the Annexes.

5. (a) Communications in accordance with U. S. F. Seventy, as modified
by Annex III.

(b) Use Greenwich Civil Time.

(c) The Commander-in-Chief will keep the Fleet advised of his location.

                                            _________ _________,
                                            Admiral, U. S. Navy,
                                            Commander-in-Chief,
                                            United States Pacific Fleet.

[68] [sic]

        CHAPTER IV. TENTATIVE OPERATION PLANS-PHASES I AND IA

Section 2. Phase IA
                             Tentative
                                       United States Pacific Fleet
                                       U. S. S. PENNSYLVANIA, Flagship,
                                       Place
                                       Date.
Operation Plan No. 1A-R5.

                   Initial task organization

(See Basic Fleet Plan for normal organization.)

(a) Task Force One. Commander Battle Force.-Normal units this task force
less any cruiser absent on patrol with Task Force Three less 1 CV and
all other large CL's to Task Force Two for reconnaissance of MARSHALLS.

(b) Task Force Two. Commander Aircraft, Battle Force.-Normal units this
task force plus 1 CV and available CL's (approximately 4) from Task
Force One plus 1 CV from Task Force Three less any cruiser absent on
patrol with Task Force Three.

Page 512

(c) Task Force Three. Commander Scouting Force.-Same as for Operation
Plan 1-R5 less 1 CV to Task Force Two less 1 SS and 1 AO from SAMOA
returned to their respective normal task forces plus 1 AO from Task
Force Six for fueling at sea.

(d) Task Force Nine (Patrol Plane Force) Senior Officer Present,
Aircraft Scouting Force, HAWAIIAN AREA).-Same as for Operation Plan 1-
R5.

[69]

                      PART V. SPECIAL, PROVISIONS

         CHAPTER IV. TENTATIVE OPERATIONS PLANS-PHASES I AND IA

Section B. Phase IA

(e) Task Force Seven (Undersea Force) Commander Submarines, Scouting
Force.
    Same as for Operation Plan 1-R5
    plus 1 SS returned from Task Force Three.

(f) Task Force Eight (Mining Force)
    Non-operative as such, normal units thereof being detached from Task
    Forces One and Two at end of Phase I and on commencement of Phase
    IA being transferred to Task Force Four.

(g) Task Force Six (Logistic and Control Force) Commander Base Force.
    Same as for Operation Plan 1-R5,
    plus 1 AO returned from Task Force Three
    less 2 AO transferred to Task Force Two
    less 1 AO transferred to Task Force Three.

(h) Task Force Four (Hawaiian Naval Coastal Frontier) Commandant,
Fourteenth Naval District.
    Normal units this task force
    plus all units of Minecraft, Battle Force.

(i) Task Force Five (Pacific Southern Naval Coastal Frontier) Commandant
Twelfth Naval District.
    Same as for Operation Plan 1-R5.

(j) Task Force Ten (Pacific Northern Naval Coastal Frontier) Commandant
Thirteenth Naval District.
    Same as for Operation Plan 1-R5.

1. Information, Assumptions as previously given in Parts I, II, and III
of this Navy Plan O-1, Rainbow Five.

[70]

2. This Fleet, while protecting the sea communications and territory of
the Associated Powers in the Pacific Area, and supporting the operations
of the British Navy south of the equator as far west as Longitude one
hundred fifty-five degrees East, will:

(a) Conduct an initial sweep with light forces and aircraft against
enemy merchant ships and raiders.

(b) Raid Japanese communications to westward of NANPO SHOTO with
cruisers.

(c) Patrol Japanese homeland with submarines.

(d) Conduct a reconnaissance and raid against the MARSHALLS, in order to
divert Japanese forces away from MALAYSIA, and to prepare for the
capture of the MARSHALL-CAROLINE area.

3. (a) Task Force One.

(1) Perform task assigned in the Patrol and Sweeping Plan (Annex I to
Navy Plan O-1, Rainbow Five).

(2) Reinforce and support operations of Task Force Two as required in
the MARSHALL Reconnaissance and Raiding Plan (Annex II to Navy Plan O-1
Rainbow Five).

(b) Task Force Two.

(1) Conduct Reconnaissance and Raid in force against the MARSHALLS as
required in the MARSHALL Reconnaissance and Raiding Plan (Annex II to
Navy Plan O-1, Rainbow Five).

[71]

(c) Task Force Three.

(1) Conduct initial sweep against enemy commerce and raiders as required
in the Patrol and Sweeping Plan (Annex I to Navy Plan O-1, Rainbow
Five).

(2) Reinforce Task Force Two as required by the MARSHALL Reconnaissance
and Raiding Plan (Annex II to Navy Plan O-1, Rainbow Five).

(3) Move from SAN DIEGO to HAWAII the remaining units and equipment of
the Second Marine Division and continue training for landing exercises.

Page 513

(4) Continue preparations and training for landing attacks on Japanese
bases in the MARSHALLS with particular emphasis on plan for capture of
ENIWETOK.

(5) Furnish additional defenses for outlying bases as may be requested
by Commander Task Force Four (Hawaiian Naval Coastal Frontier) and
approved by the Commander-in-chief.

(d) Task Force Nine (Patrol Plane Force).

(1) Subject to the specific tasks prescribed below, operate patrol
planes in the HAWAIIAN Area including outlying islands so as to gain the
earliest possible information of advancing enemy forces. Use them
offensively only when other types of our own are not within striking
distance, and the risk of damage to the planes is small; or when the
importance of inflicting damage on the objective appears to justify the
risk of receiving the damage which may result.

[72]

(2) Perform patrols required by the Patrol and Sweeping Plan Annex I to
Navy Plan O-1, Rainbow Five).

(3) Coordinate the service of information with the operations of other
forces.

(4) Perform tasks assigned in the MARSHALLS. Reconnaissance and Raiding
Plan (Annex II to Navy Plan O-1, Rainbow Five).

(5) Withdraw patrol planes from advance bases when necessary to avoid
disproportionate losses.

(6) Maintain not less than two squadrons (one may be VJ squadron from
Base Force) based on OAHU at all times. During the absence of major
portions of the Fleet from the vicinity of OAHU, such squadrons may, at
discretion, be temporarily transferred to Commander Task Force Four
(Hawaiian Naval Coastal Frontier).

(e) Task Force Seven (Undersea Force).

(1) Continue patrol of two submarines each at WAKE and MIDWAY.

(2) Establish maximum practicable initial patrol off the Japanese
Homeland and thereafter maintain it at the maximum strength permitted by
operating conditions, giving stations the following priority:
    YOKOHAMA
    BUNGO CHANNEL
    KII CHANNEL
    TSUSHIMA
    NAGASAKI
    SHIMONOSEKI
    TSUGARU

[73]

(The Commander-in-Chief will make arrangements for submarines to pass
through that part of the Far Eastern Area in the NANSEI SHOTO as far
south as Latitude twenty-eight degrees, thirty minutes North).

(3) Inflict maximum damage on enemy forces, including shipping,
utilizing mines and torpedoes and, if appropriate, gunfire. Mining of
Japanese waters outside the three mile limit may be planned. Specific
authority for such mining will be issued later.

(4) Report important enemy movements by radio if success of attack
mission is not thereby jeopardized.

(f) Task Force Eight (Mining Force).

(1) Report to Commander Hawaiian Naval Coastal Frontier to augment the
local defense forces during this Phase.

(g) Task Force Six (Logistics and Control Force).

(1) Continue general logistic support of Fleet and assistance to
outlying bases.

(2) Perform tasks assigned in the Patrol and Sweeping Plan (Annex I to
Navy Plan O-1, Rainbow Five) and the MARSHALL Reconnaissance and Raiding
Plan (Annex II to Navy Plan O-1, Rainbow Five).

(h) Task Force Four (Hawaiian Naval Coastal Frontier).

(1) Continue tasks assigned in Operation Plan 1-R5, with regard for the
probable increase in enemy activities.

[74]

(i) Task Force Five (Pacific Southern Naval Coastal Frontier).

(j) Task Force Ten (Pacific Northern Naval Coastal Frontier).

(1) Continue tasks assigned in Operation Plan 1-R5 with regard for the
probable increase in enemy activities.

(2) Perform the tasks assigned by the Patrol and Sweeping Plan (Annex I
to Navy Plan O-1, Rainbow Five).

4. Logistic replenishment at PEARL HARBOR, on the West Coast, and as
specially provided for in the Annexes.

Page 514

5. (a) Communications in accordance with Annex III to Navy P]an O-1
Rainbow Five.

(b) Use GREENWICH Civil Time.

(c) The Commander-in-Chief will keep the Fleet advised of his location.

                                                    __________ ________,
                                                    Admiral, U. S. Navy,
                                                    Commander-in-Chief.
                                                    U. S. Pacific Fleet.

[I-1]
                                ANNEX I

                                         U. S. Pacific Fleet.
                                         United States Pacific Fleet
                                         U. S. S. PENNSYLVANIA, Flagship
                                         Place
                                         Date
Patrol and Sweeping Plan
    No.

INITIAL TASK ORGANIZATION

(a) Task Force One.
(b) Task Force Two.
(e) Task Force Three.
(d) Task Force Nine (Patrol Plane Force).
(e) Task Force Seven (Undersea Force).
(F) Task Force Six (Logistic and Control Force).
(G) Task Force Four (Hawaiian Naval Coastal Frontier).
(H) Task Force Five (Pacific Southern Naval Coastal Frontier).
(I) Task Force Ten (Pacific Northern Naval Coastal Frontier).
(Units of these task forces initially same as in Operation Plan 1-R5.)

1. Information and Assumptions as previously given in Parts I, II, and
III of this Navy Plan O-1, Rainbow Five. Latest information of enemy
dispositions estimated intentions, and location of merchant shipping
will be furnished by the Commander-in-Chief, U. S. Pacific Fleet, at
time of execution.

2.                              Phase I

This Fleet will, in the Pacific Area, protect the territory and sea
communications of the Associated Powers by:

[I-2]  (a) Patrolling against enemy forces, particularly in the vicinity
of the Hawaiian Islands ; and on shipping lanes (1) West Coast-Hawaii,
(2) Trans-Pacific westward of Midway and (3) in South Seas in vicinity
of Samoa.

(b) Escorting as conditions require and forces available permit.

(c) Covering.

(d) Employing striking forces against enemy raids and expeditions.

(e) Routing shipping.

                                 Phase IA

This Fleet will: (a) continue the operations of Phase I, except as to
patrols which will be modified or discontinued as necessary in order to
carry out prescribed offensive operations;

(b) attack enemy communications by making initial sweep for enemy
merchant ships and raiders, and by raiding Japanese sea communications
westward of Nanpo Shoto;

(c) reconnoiter and raid the Marshall Islands.

                              Subsequent Phases

This Fleet will: (a) continue operations of Phase I except as to
patrols, for which further directives will be issued later.

3. (a) Task Force One.

(1) Cover territory, forces and shipping of the Associated Powers as
directed.

[I-3]

(2) Furnish one cruiser (in rotation as practicable) to Task Force Three
for cruiser patrol pool; and be prepared to furnish, on order, other
patrols or a striking force, or both.

Page 515

(3) While en route in accordance with Marshall Reconnaissance and
Raiding X Plan (Annex II to Navy Plan O-1) conduct such sweep as
information and circumstances at the time permit without interference
with the primary task.

(b) Task Force Two.

(1) Furnish one cruiser (in rotation as practicable) to Task Force Three
for cruiser patrol pool. (In case of detachment of Atlantic
reinforcement this subparagraph is inapplicable).

(2) Be prepared to furnish, on order, other patrols or a striking force,
or both.

(3) Develop contacts made by patrol planes from Oahu if vessels of Task
Force Three are not within supporting distance of such contacts.

(4) While en route in accordance with Marshall Reconnaissance and
Raiding Plan (Annex II to Navy Plan O-1) conduct such sweep as
information and circumstances at the time permit without interference
with the primary task.

(c) Task Force Three, reinforced with one cruiser each from Task Forces
One and Two (for cruiser patrol pool), NARWHAL or NAUTILUS from Task
Force Seven (Undersea Force), and one oiler from Task Force Six
(Logistic and Control Force), also further reinforced by one squadron of
patrol planes and tenders from Task Force Nine (Patrol Plane Force) (by
request on Commander Task Force Nine) when the situation in the South
Pacific requires and facilities there permit:

(1) Patrol against enemy units that may attack own and allied
communication lines, operating in general as follows:

[I-4]

(a) Maintain two cruisers (one, if Atlantic Reinforcement is detached)
on patrol between Hawaii and the Pacific Coast in areas more than five
hundred miles from land. Reservice such ships either in Hawaii or on
Pacific Coast.

(b) (i) Maintain two cruisers, two destroyers, one submarine and one
oiler in the South Pacific based on Samoa, normally keeping one cruiser
on patrol within one thousand miles of Samoa along routes to New
Zealand.

(ii) When the situation in the South Pacific requires and facilitates
there permit request from Commander Task Force Nine (Patrol Plane Force)
assignment of a patrol squadron and tenders, and advance it into that
area for operations.

(iii) Coordinate activities of unit operating in the South Pacific with
British naval forces as far west as longitude one hundred fifty-five
degrees East as the situation at the time makes expedient, and in
accordance with such directives as may from time to time be issued.

(c) Maintain one cruiser, based on Midway, on patrol to the northward of
the Midway-Marianas line, in the vicinity of trans-Pacific trade routes.

(2) Upon commencement of Phase IA, dispatch two heavy cruisers in
company to raid Japanese communications westward of the Nanpo Shoto, and
return to base when fuel situation or other circumstances require.
Arrange directly with Commander Task Force Six for fueling such cruisers
at or near Midway on outward passage and on return as may be feasible.
The Commander-in-Chief will make arrangements with the Commander-in-
Chief, Asiatic Fleet, concerning the utilization of the portion of the
Far Eastern Area involved.

[I-5]

(3) Upon commencement of Phase IA, discontinue patrols required by
paragraph 3 (c) (1) and sweep for enemy merchant ships, operating along
the following general lines:

(a) Samoa based cruisers and destroyers sweep northward to latitude
twenty thence to rendezvous designated by Task Force Commander for
operations in conjunction with the Marshall Reconnaissance and Raiding
Plan (Annex II to Navy Plan O-1). Other Samoa based units rejoin their
normal commands.

(b) Cruisers on patrol between West Coast and Hawaii sweep or search for
specific enemy merchantmen, as Task Force Commander may require enroute
to rendezvous designated by him for operations in conjunction with
Marshall Raid.

(c) Other available units conduct maximum practicable sweep in general
area bounded by Hawaiian Island chain, latitude forty-six North, and
longitudes one hundred sixty-seven West and one hundred eighty; such
sweep to occupy about six days, and to begin on or as soon after J-day
as possible.

(d) Units operating in the foregoing northerly area originate radio
traffic to indicate an advance toward Japan via a northern route.

(4) (a) Upon completion of sweep directed in subparagraph (3) (c) above,
rendezvous with oiler supplied by Task Force Six (Logistics and Control
Force) in latitude twenty-seven North, and one hundred seventy-eight
West, or other rendezvous you may have designated. Fuel and proceed to
join Task Force Two (Marshall Reconnaissance and Raiding Plan, Annex II
to Navy Plan O-1) on twelve J-day at rendezvous Tare in latitude sixteen
North, longitude one hundred seventy-seven East or other designated time
and rendezvous.

Page 516

(b) If any units will be delayed in joining Task Force Two, advise the
commander thereof as to the extent of the delay.

[I-6]

(c) If conflict of tasks exists, operations against inferior enemy
forces within striking distance take precedence over joining Task Force
Two.

(5) If Atlantic Reinforcement is detached, assign two heavy cruisers to
Task Force Two. (In such event the assignment of one cruiser from Task
Force Two to Task Force Three, hitherto mentioned will, of course, not
be made).

(d) Task Force Nine (Patrol Plane Force).

(1) Having due regard for time required to overhaul and upkeep planes
and for conservation of personnel, maintain maximum patrol plane search
against enemy forces in the approaches to the Hawaiian area.

(2) Initially base and operate one patrol plane squadron from Midway. At
discretion increase the number of planes operating from bases to
westward of Pearl Harbor to two squadrons, utilizing Johnston and Wake
as the facilities thereat and the situation at the time makes
practicable.

(3) Be prepared, on request of Commander Task Force Three, to transfer
one patrol squadron and tenders to that force for prompt operations in
the South Pacific.

(4) Be particularly alert to detect disguised raiders.

(5) In transferring planes between bases, conduct wide sweep enroute.

(6) Planes engaged in training operations furnish such assistance to
Naval Coastal Frontiers in which based as may be practicable.

(7) Effect closest cooperation practicable with surface forces engaged
in sweeping during initial sweep of Phase IA.

[I-7]

(8) Modify patrols as necessary in order to carry out tasks assigned in
Marshall Raiding and Reconnaissance Plan (Annex II to Navy Plan O-1).

(9) Units operating from outlying bases cooperate, to the extent
compatible with assigned tasks, with other forces thereat. Be guided by
principles of command relationship set forth in Annex IV to Navy Plan O-
1

(e) Task Force Seven (Undersea Force).

(1) Maintain two submarines on patrol at Wake and two at Midway for
gaining information and for attack on enemy units approaching those
places.

(2) Be prepared, if Commander-in-Chief directs, during Phase I to
conduct observations, by submerged submarines from outside the three-
mile zone, of probable radar bases in the Japanese Mandates.

(3) At commencement of Phase IA, or earlier if so directed, establish
patrols off the Japanese homeland as prescribed in the basic Fleet Plan.

(4) Route submarines advancing to westward for patrols so as to cover
wide front. Coordinate such routing with other patrol and sweeping
operations, including that prescribed for cruisers in the area westward
of Nanpo Shoto, so as to avoid contact of submarines with own forces

(5) Keep Commander-in-Chief and task force commanders concerned advised
as to location and routes of own submarines.

(6) Transfer NAUTILUS or NARWHAL to Task Force Three for operations in
South Pacific during Phase I.

(f) Task Force Six (Logistic and Control Force).

(1) Through liaison with Commanders of Task Force Five (Pacific
Southern) and Task Force Four (Hawaiian

[I-8]

Naval Coastal Frontiers) ensure that routing of shipping is in
accordance with general directives of the Commander-in-Chief and is
coordinated with the protection offered by Fleet patrols and with the
routing and protective measures of the British in the South Pacific.

(2) Escort important ships or convoys by using combatant vessels en
route to or from the West Coast and Hawaii, which vessels are made
available for that purpose. If escort is found necessary and suitable
vessels will be not available by modifying schedules of escorts or
convoys, make suitable representations to the Commander-in-Chief as far
in advance as possible.

(3) During Phase I maintain one oiler at Samoa to operate under
Commander Task Force Three.

(4) Provide oiler to fuel at sea units of Task Force Three on eight J-
Day in latitude twenty-seven North, longitude one hundred seventy-eight
West, or at time and place designated by commander of that Task Force.

(5) See also oiler requirements under Marshall Reconnaissance and
Raiding Plan (Annex II to Navy Plan O-1).

(g) Task Force Four (Hawaiian Naval Coastal Frontier).

(1) Coordinate, as practicable, patrol in coastal zone with patrols by
other Fleet forces.

Page 517

(2) Through liaison with Commander Task Force Six (Logistics and Coastal
Force) and Commander Task Force Five (Pacific Southern Naval Coastal
Frontier) coordinate routing and escort of shipping in the Hawaiian
Naval Coastal Frontier with that in the Fleet Control Zone, when and if
established, and in the general Pacific Area.

[I-9]

(h) Task Force Five (Pacific Southern Naval Coastal Frontier).

(1) Coordinate routing of shipping with the protection afforded by Fleet
forces and by British forces in accordance with current situation, and
with general directives that may be issued by the Commander-in-Chief.

(2) Conduct such search and patrols in vicinity of own theater as
practicable with available forces. Keep the Commander-in-Chief fully
advised of information gained. Also, when circumstances warrant,
communicate such information direct to any Fleet forces in the vicinity.

(3) In the initial stages of Phase IA, particularly, cooperate with any
Fleet forces in the vicinity in locating enemy merchantmen within flying
range of the West Coast, obtaining assistance and cooperation of Army
units as is practicable

(i) Task Force Ten (Pacific Northern Naval Coastal Frontier).

(1) Conduct such search and patrols in vicinity of own theater as
practicable with available forces. Keep the Commander-in-Chief fully
advised of information gained. Also, when circumstances warrant,
communicate such information direct to any Fleet forces in the vicinity.

(2) In initial stages of Phase IA, particularly, cooperate with any
Fleet forces in the vicinity in locating enemy merchantmen within flying
range of the West Coast, obtaining assistance and cooperation of Army
units as is practicable. It is especially desired to cover until eight
J-Day UNIMAK PASS and the maximum area to the southward of Dutch Harbor
that daily flights and available planes will permit.

(X) (1) This plan effective simultaneously with Navy Plan O 1, Rainbow
Five.

[I-10]

(2) All task forces make available to Commander Task Force Six
(Logistics and Control Force) for escort duty, all ships enroute between
Hawaii and West Coast.

(3) Destroy enemy combatant ships encountered.

(4) Capture or destroy enemy merchant ships encountered.

(5) Investigate neutral merchant ships encountered; send them to port
for adjudication if investigation warrants- or if necessary and
permissible under international law, destroy them. (See "Instructions
for the Navy of the United States Governing Maritime Warfare").

(6) Seize any opportunity to inflict disproportionate damage on the
enemy, modifying or discontinuing plans in operations if necessary in
order to do so.

(7) Disseminate pertinent information to other Task Force Commanders as
conditions of radio silence and other circumstances permit.

(8) Aircraft attempt, without taking undue risk, to force merchant ships
to the vicinity of supporting surface vessels or to United States'
ports.

(9) This plan effective with Navy Plan O-1.

(10) Be prepared to transfer units of Southeast Pacific Force and
Atlantic Reinforcement on short notice. So employ such units that if
transferred they can reach Canal Zone within twenty-one days. If
transferred, such units proceed along routes and conduct such sweeps as
the Commander-in-Chief may prescribe.

(11) Continue such training as these and other prescribed operations
permit.

[I-11]  4. Logistics as in Navy Plan O-1, Rainbow Five.

5. Provisions of Part V Navy Plan O-1, Rainbow Five apply.

                                            ___________ _____________,
                                            Admiral, U. S. Navy,
                                            Commander-in-Chief,
                                            United States Pacific Fleet.

Page 518

[II-1]                       ANNEX II

                                         United States Pacific Fleet
                                         U. S. S. PENNSYLVANIA, Flagship
                                         Place
                                         Date

            Marshall Reconnaissance and Raiding Plan No.----

Initial Task Organization.

(a). Task Force One.
(b). Task Force Two.
(c). Task Force Three.
(d). Task Force Nine (Patrol Plane Force).
(e). Task Force Seven (Undersea Force).
(f). Task Force Six (Logistic and Control Force).

Units of these task forces initially same as in Operation Plan 1A-R5.

1. (a) Information.-(1) This plan covers the initial operations in the
MARSHALLS for carrying out the basic task of diverting Japanese strength
away from the MALAY BARRIER through the denial and capture of positions
in the MARSHALLS.

2. This force will:

(a) Reconnoiter the MARSHALLS, particularly ENIWETOK, preparatory to a
raid in force and to eventual capture, in order to develop the mobile
and land defenses and material installations therein.

(b) Raid the MARSHALLS with ships and aircraft and small landing groups
in order to destroy enemy mobile forces, fixed defenses and facilities.

[II-2]

3. (a) Task Force One.-(1) Transfer available large light cruisers and
carrier to Task Force Two on J-Day.

(2) About Five J-Day, depart PEARL HARBOR with remainder of force and
proceed to rendezvous with Task Force Two at Point Tare on Eleven J-Day.
If delay in arriving at rendezvous is in prospect, advise Commander,
Task Force Two, of the probable time of arrival. Transmit any such
message prior to departing from the PEARL HARBOR area, if possible.
Sweep as practicable along the route as required by Patrol and Sweeping
Plan (Annex I to Navy Plan O-1, Rainbow Five.

(3) If the Commander-in-Chief is not present upon making the rendezvous,
Commander Task Force One assume general charge of all further operations
in connection with this reconnaissance and raid, and direct Commander
Task Force Two to commence the raid at a suitable time after he has
reported ready.

(4) Upon making rendezvous, assume command of battleships of Task Force
Two.

(5) Cover operations of Task Force Two, as reinforced, from the area to
the northward of the MARSHALLS, furnishing such support to that force as
developments require, and keeping its commander informed as to the
location of Task Force One. Detail escorts for any damaged ships of Task
Force Two which it may be necessary to return to base.

(6) Utilize security offered by operations of patrol planes at WAKE.

[II-5]

(7) After Task Force Two has completed raids and rejoined, if the
Commander-in-Chief is not present, Commander Task Force One carry out
further operations of a similar nature or conduct the combined forces to
PEARL HARBOR at discretion.

(b) Task Force Two, reinforced as provided in this plan, reconnoiter and
raid the MARSHALLS, carrying out the following approximate procedure:

(1) On One J-Day, unless otherwise directed, depart PEARL HARBOR with
reinforcements provided by this Plan and proceed toward TAONGI;
battleships and destroyer screen at fifteen knots, remainder of force at
twenty knots. Sweep along the route in accordance with Patrol and
Sweeping Plan (Annex I to Navy Plan O-1 Rainbow Five) and furnish
security as practicable to Task Force One. Furnish destroyer escort to
oilers as prescribed in paragraph 3 (f) (1).

(2) Five J-Day, fuel the advance group from oilers at Rendezvous Tare or
other designated rendezvous.

(3) Six J-Day to Nine J-Day reconnoiter the MARSHALLS as follows:

(i) Reconnoiter by air such atolls as weather conditions, forces, time
and developments permit, giving particular attention to ENIWETOK,
BIKINI, RONGE-LAP, WOTJE, JALUIT, KWAJALEIN, MALOELAP and ARNO.
Reconnoiter ENIWETOK particularly with a view to an early attack for its
seizure.

Page 519

[II-4]

(ii) So conduct reconnaissance as to leave the enemy in doubt as to what
further reconnaissance is about to be undertaken, or as to what
particular places may be attacked.

(iii) Supplement air reconnaissance by reconnaissance from surface units
and by landing patrols, and raid with forces immediately available if
the situation and developments at the time indicate that such
supplementary action is desirable and feasible.

(iv) Utilize both photographic and visual observations to determine as
accurately as practicable the opposition that may be expected to raids
and landing parties; and the targets suitable for air and surface
bombardment. Of particular interest are:

ships and aircraft;
storage tanks;
power plants and radio installations;
docks air fields storehouses and other buildings;
guns and observation posts;
mines;
channel and beach obstructions;
other defense installations;
beaches suitable for landing operations;
extent of anchorage area;
hydrographic, topographic, and meteorological features.

(v) Retire on own battleships or Task Force One for assistance should
circumstances require.

(vi) Operate battleship group to furnish support as necessary.

(vii) Unless persistent bad weather or other unforeseen developments
prevent, adjust operations to complete reconnaissance in four days or
less after making initial flights over enemy territory.

[II-5]

(viii) Upon the completion of reconnaissance, withdraw to join Task
Forces One and Three. Transfer battleships to Task Force One. Task Force
Three will merge into Task Force Two at this time.

(ix) Study and analyze information gained in reconnaissance; determine
upon the atolls to be raided and the specific objectives for attack.
Complete final plans therefor, with due regard for subparagraph (4)
below, and issue to those concerned. Via destroyer, furnish the
Commander, Task Force One and the Commander-in-Chief, if present, with
information and aerial photographs obtained, and copy of raiding plan.

(x) Report by visual (or by destroyer if out of signal distance) to the
Commander-in-Chief, if he is within the general area, otherwise to the
Commander, Task Force One, the time it is desired to place the raiding
plan into effect.

(4) Beginning about Thirteen J-Day, when directed, carry out the raiding
plan. In preparing and carrying out the raiding plan, be guided by the
following:

(i) Make such additional air reconnaissance immediately prior to attack
as best meets the existing situation.

(ii) Attack the selected objectives with air and surface forces, the
scheme of attack being at the discretion of the Task Force Commander and
designed to provide the best economy of force. Avoid directing enemy
attention in advance to the objectives of attack.

[II-6]

(iii) The priority of objectives is as follows:
combatant ships, tenders, and aircraft;
other ships;
fuel tanks power and radio installations;
troop concentrations;
storehouses;
other installations.

(iv) Except in unusual circumstances, no vessel expend more than twenty-
five per cent of bombs or ammunition on fixed objectives.

(v) Where conditions appear favorable, land personnel to demolish
installations and eliminate enemy personnel.

(vi) Do not enter lagoons with ships.

(vii) Make suitable arrangements for the protection of and withdrawal of
damaged ships, requesting escorts from Task Force One.

Page 520

(viii) If sufficient weakly held positions are developed to warrant
further raids, carry them out, otherwise discontinue raids at discretion
and join Task Force One.

(c) Task Force Three.-(1) If Atlantic Reinforcement has been detached,
transfer two heavy cruisers at PEARL HARBOR to Task Force Two.

(2) If carrier is available, assign it to Task Force Two for this
operation beginning J-Day.

[II-7]

(3) While in the Northern Pacific carrying out the Patrol and Sweeping
Plan (Annex I to Navy Plan O-1, Rainbow Five) employ radio to deceive
enemy as to intentions in the MARSHALLS.

(4) If available, assign combat unit of about one hundred fifty marines
to each cruiser which will eventually join Task Force Two.

(5) Upon completion of the task assigned in the Patrol and Sweeping Plan
on about Ten J-Day, join Task Force Two with cruisers and destroyers at
Point Tare or other designated rendezvous. Thereafter operate as part of
Task Force Two until released upon completion of the raiding operation
of this plan.

(d) Task Force Nine (Patrol Plane Force) coordinate operations of patrol
planes with those of other forces as follows:

(1) Prior to Five J-Day advance maximum practicable patrol plane
strength to WAKE, MIDWAY, and JOHNSTON, leaving not less than two
operating squadrons at OAHU.

(2) JOHNSTON-based planes, during passage of units of other forces to
the westward, search along the route of advance from the vicinity of
JOHNSTON to longitude one hundred seventy-eight degrees west.

(3) MIDWAY-based planes search sectors to the southwestward of MIDWAY to
prevent surprise attack across that sector on units operating toward the
MARSHALLS.

[II-8]

(4) WAKE-based planes make preliminary air reconnaissance of TAONGI and
BIKAR on Five J-Day, or as soon thereafter as practicable, and acquaint
Commander Task Force Two with the results. Thereafter, conduct search,
to the extent that available planes and supplies will permit, to prevent
surprise attack from the westward by enemy surface forces on own units
operating toward the MARSHALLS.

(5) On completion of the raiding operations of Task Force Two resume
normal operations as required by paragraph 3242b. of the Fleet Operating
Plan.

(e) Task Force Seven (Undersea Force).-No primary tasks in connection
with this plan are assigned but:

(1) Submarines which may have been in the MARSHALLS in carrying out the
Patrol and Sweeping Plan (Annex I to Navy Plan O-1, Rainbow Five) report
enemy information obtained.

(2) While en route to patrol stations to the westward:

(i) Seize opportunities to damage important enemy units.

(ii) Avoid contacts with own forces.

(iii) Force Commander keep other forces advised of location and
movements of submarines.

(f) Task Force Six (Logistic and Control Force). Despatch two oilers to
carry out the following:

(1) Proceed on J-Day with destroyer escort provided by Commander Task
Force Two to rendezvous with the advance group of Task Force Two on Five
J-Day at Point Tare, or as directed by Commander Task Force Two.

[II-9]

(2) Thereafter conduct fueling and proceed as directed by Commander Task
Force Two.

(x) (1) Seize every opportunity to damage the enemy, but avoid engaging
at a disadvantage.

(2) Be alert to detect and destroy enemy mobile forces, particularly
raids or expeditions which may be directed at our outlying islands.

(3) Restrict the use of radio to a minimum.

(4) This plan effective simultaneously with the execution of Phase IA of
U. S. Pacific Fleet Operating Plan (Rainbow Five).

4. (a) Fuel from oiler as prescribed in paragraph 3 (f) above.

(b) Fuel destroyers from large ships at discretion of force and group
commanders.

(c) Logistic support for submarines and patrol planes as in U. S.
Pacific Fleet Operating Plan (Rainbow Five).

5. (a) Communications in accordance with Annex III to Navy Plan O-1,
Rainbow Five.

(b) Use GREENWICH Civil Time.

Page 521

(c) Rendezvous Tare: Latitude sixteen degrees North; Longitude one
hundred seventy-seven degrees East.

(d) The Commander-in-Chief will keep the Fleet advised as to his
location.

                                            ___________ _____________,
                                            Admiral, U. S. Navy,
                                            Commander-in-Chief,
                                            United States Pacific Fleet.

[III-1]                       ANNEX III

                                         United States Pacific Fleet
                                         U. S. S. PENNSYLVANIA, Flagship
                                         Place
                                         Date

                 Communication Plan No. 1, Rainbow Five

USF-70 effective as modified herein. The numbered parts, sections, and
paragraphs of USF-70 listed are effective in toto, or as indicated.
Omitted numbered parts, sections, or paragraphs are not effective unless
specifically made so by Task Force Commanders by supplementary
communication plans.

1110. Effective.

1120. Effective. Unless otherwise directed this communication plan is
effective coincident with the placing in effect of Navy Plan O-1 Rainbow
Five.

1170 to 1178. Effective.

1179. Effective. The above procedure shall be used for Radar contact
reports.

No receiver not supplied by Bureau of Ships shall be used for this or
any other purpose until it has been thoroughly tested to assure that it
does not transmit a carrier from its oscillating circuit.

1180. Effective.

1190. Effective.

1212. Effective.

1220. Effective

1330. Allied communications in Pacific Area are governed by SP 02376; in
the Eastern Theater by current Andus publications.

[III-2]

2120. Condition 19 effective.

2131. Effective

2200. The radio frequency plans are as set forth in Appendix B, USF-70,
except that Naval Coastal Frontier Defense Communication Plans will be
governed by Article 4005, 1(a) of WPDNC-46.

No transmission shall be made on 500 kcs. frequency without the
authority of the O. T. C. of a Task Force.

When the O. T. C. of a Task Force or component at sea considers that the
risk is justified by the importance of the traffic concerned he may
transmit traffic to the nearest shore radio station that guards the
Naval Calling Frequency (355 kc) or to Radio Washington or Honolulu on
the 4235 kc series. He shall not, except in extreme emergency and when
he is sure that the situation justifies the risk, answer calls or
receive traffic on 355 kc, except by interception.

The various circuit guards required shall be so disposed as to permit
the maximum number of ships to set watches on the radio direction
finder, underwater listening equipment and other intelligence equipment
as directed by Task Force Commanders.

The Senior Commander of Units from different task organizations
operating in the same area shall arrange for rapid means of inter-
communications, preferably by available shore stations. Task
Organization Commander in a port or operating area shall establish an
area radio frequency for use under circumstances when visual systems
will not serve. In port radio shall not be used

[III-3]

for inter-communication or communication with shore when a visual link
or landline exists or may be established.

Guard NPM Primary Fox regardless of geographical position.

2300. Effective.

2400. Effective

2510. CSP-1161 effective with this communication plan and shall be used
in lieu of CSP-776 for Task Organization command traffic.

2520. Use effective Confidential Radio Call Sign lists and ciphers for
administrative traffic.

Page 522

2540. Effective.

2720. Effective.

2740. Effective.

3000. Effective.

4120. Effective.

5000. Effective.

5230. Until receipt of satisfactory radio recognition device for
aircraft the following approach and recognition procedure shall govern
the approach of Naval aircraft to either units of the Fleet or Naval
outlying island bases. Separate special procedure will be prescribed for
major bases and areas.

Aircraft approach from outside of gun range in simple cruising formation
(if more than one plane) on bearing 045  T. or 225  T.

[III-4]

on odd days (GCT), and 135  T. or 315  T. on even days (GCT), from
center of formation or station at 1000 feet or under. (These bearings
may be changed if necessary by local authorities.) They shall never
approach from the bearing on the sun when the sun is low.

If station does not recognize plane as friendly it challenges by making
"Zs" on searchlight, or by training searchlight with red filter on plane
if available; otherwise at shore bases use a red smoke bomb during
daylight and a red rocket at night.

On seeing challenge plane, or leading plane if there is a formation,
replies as follows:

(a) Daytime.-On odd day of the month (GCT), leave formation, circle to
the right and, when back on the approach course, dip right wing twice,
on even days (GCT), leave formation, circle to the left and, when back
on approach course, dip left wing twice. This must be made distinctive,
dipping the wing about 30 degrees to the prescribed side and returning
to horizontal after each dip.

(b) Nighttime.-Turn on running lights and proceed as for daytime replies
to challenge, except circling may be omitted; or make emergency
identification pyrotechnic signal prescribed in effective CSP.

When approaching aircraft are recognized as friendly, the recognition
station shall

[III-5]

train on the approaching aircraft a powerful searchlight make "Fs" or
show green colored light. Those signals indicate to planes that they
are recognized as friendly and will not be fired on.

In a Fleet formation the recognition stations will be, unless otherwise
designated, those ships on the outer circle closest to approach bearings
045  T. and 225  T. or 135  T. and 315  T. (depending on the day) from
Fleet center

0131 Effective.

6200. Effective.

6400. Effective.

6500. Effective.

6610. Effective.

7000 (less 7100). Effective.

[IV-1]	                 ANNEX IV

Command relationships and coordination of activities as outlying bases

1. Forces operating from outlying stations or bases, under this Plan,
may consist, broadly, of the following:

(a) Local Defense Forces, consisting of the local garrison and the local
defense forces (which may include submarines and aircraft especially
designated for this purpose), operating under the direct control of the
base or station commander and with the primary mission of defending the
base or station against hostile attack.

(b) Fleet forces consisting of submarines, airplanes and possibly
surface ships or detachments, operating under a fleet task force
commander or commanders whose missions, while contributing indirectly to
local defense, are primarily dictated by broader strategical and
tactical considerations in connection with other operations.

2. Command relationships, under these conditions, will be governed by
the following:

(a) The base or station commander will, normally, command and direct the
operations of local defense forces, in accordance with the directive of
the Commander Hawaiian Naval Coastal Frontier (Commandant, Fourteenth
Naval District). This base commander, a task group commander under the
Commander Hawaiian Naval Coastal Frontier, who is himself a task force
commander under the Commander-in-Chief, may, on occasion, also have
functions of command in connection with Fleet units in the vicinity.

Page 523

(b) Fleet forces will, normally, be operated in accordance with
directives of their respective Fleet task organization commanders. In
entrance and egress, use of facilities, arrangements for berthing and
services, etc., they will conform to and be guided by the local
regulations.

(c) In the event of contact with enemy forces which may threaten the
base or the forces operating

[IV-2]

therefrom or in connection therewith, the senior officer present in the
base area will assume command of all forces and activities in the
vicinity as necessary to take appropriate action against the threatening
enemy. As it is entirely possible that such procedure may temporarily
divert Fleet forces from some broader task contemplated by their task
force commanders of the Commander-in-Chief, local commanders must bear
this in mind and reduce such diversion to a minimum. They must also,
within the limits of the information available to them, and as permitted
by the urgent local situation, so direct any action taken by Fleet units
under their temporary command, as to further the broad operating plan in
effect.

(d) To obviate to a maximum the difficulties which are inherent in the
command and communication relationships at such bases, it will be
necessary to insure that all interested commanders, including the
commanders of bases concerned, are made information addressees of all
appropriate plans, orders, and reports of enemy forces. Commanders of
all forces within the area will ensure that the base or station
commander, as well as the Senior Officer Present, is familiar with the
general nature of their orders and with their general operations (unless
specifically directed otherwise).

(e) In general, the question of command in such circumstances is covered
by articles 801 and 1486, U. S. Navy Regulations.

(f) The shifting of vessels, squadrons, or other units within an area
may result in consequent changes in seniority among those actually
present.

3. (a) A Base Defense Plan and a supporting Communication Plan will be
prepared under the direction of the Commander Hawaiian Naval Coastal
Frontier. They must provide for the Fleet units present participating in
the defense, and for adequate communications among the various fixed and
mobile forces, both local and Fleet. Commander Hawaiian Naval Coastal
Frontier will furnish copies of such plans to appropriate fleet force
commanders.

[IV-2]

The latter will, whenever practicable, supply copies to units of their
command prior to departure for operations at the outlying base. A unit
commander arriving in the area without receiving the plans in advance,
however, will obtain them as soon as possible after arrival.

(b) The Base Defense Plan should be analogous to the one currently in
effect for the Pearl Harbor area. The Senior Officer Present, in
exercising his function of command (paragraph 2 (c) of this Annex)
should normally conform to the Base plans.

(c) The Communication Plan should include provisions for:

(1) Inter-communication between units of the local defense forces, and
between such forces and the local defense commander.

(2) Communication between local defense commanders and fleet task
organization commanders.

(3) An area radio frequency which may be used within that area for both
(1) and (2) above and for inter-communication between the fleet task
organization commanders present.


This HTML document was created by GT_HTML 6.0d 12/28/96 9:52 AM.