[157] Communications Intelligence Summary, 18
November 1941
General.-Traffic volume a little under normal with receiving conditions
fair to poor. Tokyo originators active
with several messages of general address
emanating from the Communication Section. The double originator BUMIL, and N. G. S. sent one NIKAWIWI to the
Chief of Staff Combined Fleet for
information to all First Class Naval Stations. BUMIL also addressed all urgent dispatch to SAMA,
information to R. N. O. TONIC, Chief of
Staff South China Fleet and Chief of Staff Combined Fleet. Another Tokyo originator, believed to be N.
G. S., sent an urgent message to Chief
of Staff Combined Fleet, Chief of Staff French Indo China Force and Chief of Staff Second Fleet. MAIZURU Naval Station
also sent an urgent message to Chief of
Staff Combined Fleet, Second Fleet, Combined
Air Force, French Indo China Force and for information to N. G. S. The Tokyo Direction Finder plotting
section sent three long dispatches to the entire Direction Finder Net
which was very active today with many
bearings reported. The Vice Chief Naval General Staff sent one to Chief of Staff Carrier Divisions
and Chief of Staff French Indo China
Force.
Combined Fleet.-CinC. Combined Fleet very prominent as both an originator and addressee. Since this officer
is always included in the address of
every important message, he will no longer be mentioned as an addressee unless he is the only addressee. The
association between the CinC Second
Fleet and the French Indo China Forces and Combined Air Force is very plain. He was addressed by
CinC. French Indo China Force today in
an urgent NIKA dispatch. Several units of the Combined Air Force also addressed several dispatches to
him. Battleship Division Three the
Carrier Divisions and two destroyer squadrons have been associated in traffic. Several dispatches
occurred today, being addressed by N.
G. S. and the Commander Carrier Divisions in several instances. The CinC. Third Fleet also addressed several dispatches
Page 71
to him. These form the indication that CinC. Second Fleet will be in command of a large Task Force comprising the
Third Fleet, Combined Air Force, some
carrier divisions, and Battleship Division Three. No movement from home waters has been noted.
Third Fleet.-The Commander Second Base Force originated what appears to
be a movement report. He also sent one
to R. N. O. TAIHOKU, information to
CinC. Third Fleet. There were other units tentatively placed in Third Fleet who sent dispatches in which the Tokyo
movement report office was an
addressee. It is expected that the Third Fleet will move from the Sasebo area in the near future. This Second
Base Force was having quite a bit of
traffic with several Air Corps a while ago and may be transporting air units or equipment.
Fourth Fleet.-Not much activity in this fleet. The amount of traffic between this fleet and Palao is noticeable
with the submarines still interested in
Jaluit.
(FROM: U.S. CONGRESS JOINT COMMITTEE ON PEARL
HARBOR ATTACK HEARINGS; PT. 35, THE
CLAUSEN INVESTIGATION, PP. 62-81. EXHIBIT "A" DAILY COMMUNICATION
INTELLIGENCE SUMMARIES)