[140]      COMMUNICATION INTELLIGENCE SUMMARY, 4 November 1941
 
General.-Traffic volume normal with all circuits easily readable. More  tactical traffic copied than for past few days. Combined Fleet and  Carriers heard on tactical circuits. TOKYO Naval Intelligence sent four  messages to Major Commanders. One of these was for information Chief of  Staff China Fleet and one other for information of Chief of Staff Second  Fleet.
Air-High traffic level of air activities continues. Most significant of  the air dispatches were some in which various air corps were addressed  and BAKO included for information. One from Yokosuka Air was addressed  to SANCHOW Island radio for information TAKAO Air Corps. BAKO was also  noted as an addressee in several messages from SASEBO and originated two  messages to SASEBO and TOKYO. Commander Carriers also addressed a  message to two unidentified calls for information of Commander Combined  Air Force, Commander in Chief, Combined Fleet, CarDiv Collective, BAKO  and others. The Commander Combined Air Force addressed a messaged to  Commander in Chief Third Fleet.
Mandates.-The RNO PALAO was active today, being addressed by Commander  in Chief, Fourth Fleet and sent several messages to TOKYO and YOKOSUKA.  The PALOA weather station sent a long code message addressed to nearly  all the islands of the Mandates. MARCUS island appears as an originator.  No change in the location of Fourth Fleet units noted.
Submarines.-No activity noted.

 

(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)