[137]    COMMUNICATION INTELLIGENCE SUMMARY, 1 November 1941
 
General.-Traffic volume a little less than normal, receiving conditions  fair but a traffic rather slow. The first day’s yield of new calls not  very great. Fleet calls only changed, shore station calls and shore  addresses not changed. It is believed that tactical calls also remain  unchanged but not enough intercepted traffic to so state definitely. The  same garble table for calls is employed so the change amounts to a  reassignment of calls previously used. New calls have appeared but it is  thought that they were formerly assigned to obscure units or were in  reserve. All of the major Fleet calls are identified and a small amount  of individual calls were recovered today. Because the new calls are not  yet lined up save for the major Fleet Commanders and all time today was  spent in call recovery, this summary will deal only with general  impressions.
Combined Fleet.-The FIRST FLEET was not very active today in radio  traffic. The CINC SECOND FLEET appears to have originated quite a bit of  traffic to addresses placed in submarine and carrier category. No  indications of movement of any of these units. COMBINED FLEET tactical  circuits were heard but little tactical traffic copied due to  interference by NPM.
Carriers-The COMMANDER CARDIVS was mentioned in dispatches from Tokyo  and he took a fair amount of traffic on the Fleet Broadcast.
Submarines.-Nothing to report. Calls of the Submarine Fleet not well  lined up yet.
Third Fleet.-This Fleet very active as before. The SECOND and FIRST BASE  FORCEs are still marshaling their MARUs and the CINC is very busy with  Tokyo.
China.-The activity of HAINAN BASE continues. The KASHII sent several  messages from Saigon.
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(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)