[148]   Communication Intelligence Summary, 12 November 1941
 
General.-Traffic volume normal for past two days with receiving  condition about average. The general character of the traffic has been  administrative With most of it being between shore logistic and  technical activities. The D. F. net was active today with very little  activity shown yesterday. Intercept operators have commented adversely  on the major shore network which comprises all of the major naval  activities in the EMPIRE. Traffic has been moving slowly over this  circuit. The reason is the non-cooperation of the operators and the  definite lack of control exercised by TOKYO radio stations. TOKYO  Intelligence is still sending messages to the major commands but the  remainder of TOKYO traffic has been mostly from the technical bureaus.
Combined Fleet.-The Fleets remain relatively inactive in the KURE area  The association of BATDIV 3 with the Fourth Fleet and several Mandates  stations is born out by a D. F. position on the flagship of BATDIV 3  which places him about halfway between CHICHIJIMA and MARCUS Island.  Their position was obtained on the 4th when this unit was not yet  identified. No subsequent bearings have been obtained. Also associated  with this BATDIV are a Submarine Squadron and possibly CARDIV 4 although  the association of this CARDIV (Lately returned from TAKAO) is not  positive. The Third Fleet remains at SASEBO with the only activity  exhibited in the Base Forces.  Page 67
Air.-CARDIV 3 returned to KURE from TAKAO as reported by CAVITE. Most of  air activity confined to dispatches between carrier and shore  establishments.
Fifth Fleet.-Nothing to report.
Fourth Fleet.-The Defense Forces of the Mandates fairly active. The  volume of construction traffic has definitely fallen off. The Commander  Submarine Force is still adding JALUIT and today COMSUBRON 2 addressed a  message there. AIRRON 24 sent a movement report but no indication of the  direction. Communication exercises were held by JALUIT and several  stations in that area. YOKOHAMA Air Corps was addressed at RUOTTO.
China.-The previous activity of SAMA and the French Indo China Forces  and bases continues.

 

(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)