[164]   Communication Intelligence Summary, 24 November, 1941
 
General.-Traffic volume normal. High precedence traffic above normal.  Traffic analysis impresses are unchanged from yesterday's report. The  difficulties of identifications have prevented more definite information  of vessels (and fleets to which attached) that appear to be moving south  from Kure-Sasebo area. If the poor reception prevailing here the last  two days can be disregarded and the assumption made that Radio Heeia  intercepted their "share" of the total traffic, the following  impressions are worth something:
(a) The falling off of traffic to China addresses.
(b) The increased activity among third fleet addresses with a high  percentage of what appeals to be movement reports.
(c) The above normal activity in the Mandates both ashore and afloat  addresses.
The association of Second Fleet, Third Fleet and Southern Expeditionary  Force continues as usual. Palao and Jaluit appear prominently in  dispatch traffic, the Second Fleet Commander with the former, and the  Submarine Force Commander with the latter.
First and Second Fleets.-Very little activity in First Fleet. The radio  call believed to represent the flagship of Cruiser Division Seven  originated a dispatch to Commander Cruiser Division Seven, CinC. Second  Fleet, Commander Southern Expeditionary Force, and Radio Sama, Takao,  Sasebo, and Tokyo. The CinC. Second Fleet continues to appear as the  Task Force Commander of a large number of units from First and Second  Fleet plus Carrier Division Three and Combined Air Force units.
Third Fleet.-Large number of dispatches involving Third Fleet units,  some of which appear to be movement reports. The fact that CinC Third  Fleet appears as information addressee on many dispatches to and from  Second Fleet units indicates that these two fleets will be closely  associated in any future operations. Yesterday, a large number of  dispatches associating Carrier Division Three with Cinc. Third Fleet.
Fourth Fleet and Mandates.-Fourth Fleet appears to be concentrated in  Truk area since all of the recent definite reports from Fourth Fleet  vessels have come from Truk. Air Squadron Twenty-four and perhaps a  large number of submarines from the Submarine Force are in the Marshall  Area.
Submarines.-Comparatively little activity.  
China.-Comparatively quiet.  
Carriers.-No definite indications of location.  
Combined Air Force.-Commander Kanoya Air appears in the Takao area.           
Otherwise no change.

 

(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)