Enclosure 31 to Kriegstagebuch I  
     
 
The Radio Traffic during the Capture of the British Steamer
  
 
"PORT BRISBANE".
  
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        The steamer recognized by day at the smoke plume was closed at night and at 22.03 hours received the stop shot and the visual order not to use the radio. Since the steamer still starts to give an emergency message, it  was shot at and after the third salvo the radio station was put out of operation by a direct hit. During this time, the steamer managed to transmit its emergency message with position and name once. With the first "R," the jamming began. The jamming was "ve ve ve" with an illegible name, followed by a hissing noise; the entire traffic lasted about a minute. After the RR report, the 600-meter wave immediately became quiet, and after about 10 minutes, normal steamer traffic resumed, likely transmitted by the British steamer "CHANCELLOR" on shortwave. At 00:24 hours the British steamer "AGAPENOR" repeated the R report and was heard very loudly.
          The auxiliary vessel of Ship 33 also observed this jamming traffic and determined that the Marconi transmitter was not suitable as a jammer, as it was drowned out by the other transmitter. Likewise, the DEBEG transmitter s 356 s was insufficient.  
     
  Excerpt of the Radio Logbook:  
 
GMT ZZ  
15.05 22.05 British "PORT BRISBANE" gives RRRR. Own interference began immediately until the third salvo when the transmitter of the emergency report broke off.
15.18 22.18 Japanese "HITATI MARU" sends a radio message traffic with Broome Radio.
    Bromme transmits on 680 meters.
15.22 22.22 Brief very loud tone (tube transmitter) heard.
15.25 22.25 British warship "AK 4" calls Colombo Radio and then sends a short radio message with time group 1510/21.
    Bearing not possible, because too faint.
 
     
     
Click the flag to view the above page from the original German KTB
     
 
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15.58 22.58 Japanese steamer traffic with Makassar Radio.
16.24 23.24 From Singapore Radio:
    RRRR from PORT BRISBANE 29.22S 95.36W suspicious vessel firing shots at us de GQPF (BRITISH CHANCELOR)
16.36 23.36 R-report was sent once again from Singapore.
17.04 00.04 Short dashes were sent by a very loud transmitter (suspect Marconi).  Transmitter band is very broad 600-700 meters.
17.24 00.24 RRR from PORT BRISBANE 29.22S 95.36W suspicious vessel firing shots at us de GQPF ends - de MISV - 1718/20. We received RRRR at 15.06 GMT with emergency group de MISV - MISV/GPZK AGAPENOR very loud bearing 90°T.
17.25 00.25 Perth Radio sends "AGAPENOR" received confirmation.
17.31 00.31 The RRRR-report was repeated on Shortwave 36 meters from Singapore.
1753 01.53 "AGAPENOR" calls Perth Radio, received no answer.
22.12 05.12 Penang Radio repeated the RRRR-report twice.