Excerpt of the Radio Log U-25
 
     
 
Date
 Receive-Sent and Repeat time Serial Number
T  e  x  t
       
13.01.40 17.40 1715/13/100 F.d.U. West from U-32. 13.00 hours square Emil 2234.  Return transit.  2 tankers square Emil 1228 and 330 upper-center
  22.19  
13.01.40 19.16 1900/13/2 B.d.U. from U-20. Position square 4493.  Return transit Route I.  Three failures, 1 steamer.
  23.12  
17.01.40 09.02 0805/17/44 B.d.U. from U-20. Intend arrival Lightship Fritz 17 January about 15.00 hours
  11.48  
17.01.40 04.43 0230/17/41 B.d.U. from U-55.  Position 17 January 02.00 hours square AN 6698.
  08.36  
17.01.40 20.45 1753/16/46 B.d.U. from U-44.  Square BF 4535.  Proceeding to the south.  3 steamers sunk.  ARENDSKERK due to trying to escape, transmitting, banned goods.  Convoy not detected.  U-boats and aircraft surveillance.  Weather favorable.  Heavy neutral traffic, mostly Italians.
20.01.40 19.30 ii Weather from U-25.  18.30 hours SE moderate breeze, +6°C, 1018 mb, Vis, 30 nm, rain showers, +11°C, bad weather clouds, medium-long SE-Swell, AM 49.
  23.30  
  01.30  
21.01.40 01.28 1936/20/95 B.d.U. from U-34.  Position square Otto 1979 task Place 2 completed.
  02.28  
22.01.40 15.15 ii WX from U-55. 12.00 hours, S moderate breeze, air temperature +8°C, 955 mb, Vis. 10 nm, no particular phenomenon, cloudless, water temperature +13°C, no clouds, medium-long SE-Swell, BE 33.
23.01.40 08.23 Alfa 025 Gustav Gelb, square 1494, Max Luzie Willi, Gamma Ulli, Hans Öl.    U-34  [These messages are Short Signals]
  09.01 0705/23/67
  10.08    
23.01.40 10.15 Alfa 169 Gustav Gelb, Quö 1394, Karl Sofie Jot, Gamma Tonie, Hanns Otto.    U-34 
  12.09 0840/68/
23.01.40 18.06 Alfa 510 Gamma Viktor, square 1294 Otto, Lamda 9, Delta 250.
    1140/ U-34
23.01.40 20.22 Alfa 599 Gustav Gelb, Otto? Square CG 8255, Delta 350, Lamda 8. U-44
    1720/23
 
                 
     
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24.01.40 08.12 Alfa 071 Gustav Gelb, square 8225, Karl Sofie Gustav, Cäsar Gustav, Delta 350, Lamda 8.    U-44
    2330/85
24.01.40 15.17 Alfa 256 Gustav Gelb, square CG 5552, Max Luzie Willi, Delta 0, Lamda 8.    U-44
  15.21 1200/24/92
  16.07    
24.01.42 23.23 ii WX from U-51.  20.000 hours, Wind SE, moderate breeze, at temperatures from 30°C up to +5°C, air temperature +8°C, 1009 mb, Vis. 4 km, no fog or precipitation in the last hours, heavily cloudy 5/10-9/10, water Temperature +12°C, low bad weather clouds, and medium-long S-Swell, square AM 54.    U-51
25.01.40 21.40 2002/25/55 B.d.U. from U-44.  Square CG 2298 23 January 1 steamer shot from convoy.  Severe depth charge pursuit, convoy dissolved.  At night 1 other steamer sunk.  No supply.  3 torpedoes in the boat.  So far torpedo download not possible.
  21.55  
  23.55  
27.01.40 01.35 2358/26/70 B.d.U. from U-25.  Position square BF 7284, proceeding to the south, execution night of 30 to 31 January possible.  Radio Message reception was confirmed.  Still have 5 torpedoes.
  01.42  
  03.42  
28.01.40 19.17 1814/28/92 B.d.U. from U-34. Radio Messages 0423 and 0734 settled.  One steamer sunk, three-miss on auxiliary cruiser, have begun return transit, square Otto 692.
  19.19  
  20.02  
29.01.40 20.05 Alpha 174 Gustav Gelb, Lambda Max, Gamma Toni, square BF 2461.    U-55
    1735/29/42
29.01.40 21.14 2102/29/46 B.d.U. from U-51.  One outer torpedo tube door will not shut.  Unclear to dive over 50 meters.  2 steamers sunk, position square BF 1154.
  21.19  
  23.02  
29.01.40 23.40 Alpha 872 Gamma Viktor, square BF 2458, Gamma Richard, Lamda 8.    U-55
  23.43 1945/29/49
30.01.40 00.14    
05.02.40 21.10 1807/5/84 B.d.U. from U-25. Square CG 5194.  Return transit.  Starboard exhaust gas valve and starboard diesel out of service.  Limitedly clear to dive.  Up to now have sunk "ARMANISTAN" from convoy, additionally 1 English auxiliary, 1 Swedish tanker, 2 Norwegian, together 26000 tons.
  22.07  
  21.35 1403/5/89
  23.00  
09.02.40 20.45 ii WX from U-25.  20.00 hours SSE, moderate breeze, +10°C, 1007 mb, Vis. 5 nm, completely overcast, water temperature +10°C, bad weather clouds, medium-long SW-Swell, square AM 49.    U-25
  20.52  
  21.50  
  22.12  
  01.30    
  01.31    
 
     
     
     
 
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10.02.40 233.55 ii WX from U-48.  16.00 hours, ESE 5, fresh breeze, +14°C, 1015 mb, Vis. 2 nm, no precipitation, mist, +11°C, water temperature +11°C, bad weather clouds, medium-long SE-Swell, square OT 48.
11.02.40 00.11  
10.02.40 23.45 2003/10/92 B.d.U. from U-48.  9 February 04.15 hours Schulze 1 "BUGERDYK" today bu Prize Regulations, still 80 cbm, 4 + 2 torpedoes.  Position square Otto 2034.
11.02.40 05.15  
12.02.40 08.40 0430/12/89 B.d.U. from U-9.  Position square Emil 2050. Task Albatros completed.  One steamer.  Return transit vis Route 2.
12.02.40 09.21 Alpha 165 Gamma, Sofie Anton Fritz, Übel Fritz, Gamma Toni, Lamda Hans, square BF 1737.    U-37
    0705/12/48
12.02.40 15.36 Alpha 111 Delta 265 Bruno 439 Übel 58, Lucie 9, Übel 53.  U-48
    1359/12/53  
12.02.40 15.17 Alpha 517 Delta 250 Bruno 49 Übel 58, Lucie 10 Übel 6.  U-48
    1501/12/55  
12.02.40 16.02 1955/11/86 B.d.U. from U-56.  Square 4519 return transit Route Blau.  No success.  2 miss shots possible, 3 torpedoes certain failures.
13.02.40 19.57 1907/13/7 B.d.U. from U-14.  Attack periscope stiff due to foreign bodies.  Intend night attack opportunities on outbound transit.
  23.04  
13.02.40 22.24 2200/13/11 B.d.U. from U-18. Square 4575 outer diesel exhaust gas valve leaks, only limitedly clear to dive.  Intend after consumption of torpedoes . . . . ?. . .  Route Blau.
14.02.40 22.43 1602/14/28 B.d.U. from U-25.  Position square AN 3176.
  00.48    
14.02.40 19.08 1605/12/28 B.d.U. from U-56.  Request measures Hans Sophie from 18.00 hours.
14.02.40 19.28 1513/14/22 B.d.U. from U-10.  Request tasking in open squares because of shallow water outfitting.
15.02.40 20.53 1917/15/46 B.d.U. from U-25.  Position square AN 6276.  Gyro-compass failure, globe replaced.  Intend submerged by day, arrival Saturday.
16.02.40 07.24  
17.02.40 01.05 Alpha 402 Zet Gamma, Delta 90, Lamda Max, Gamma Viktor 1646, Karl Sophie Hans.    U-57
  01.08 0018/17/77
17.02.40 08.43 2357/16/82 B.d.U. from U-14.  Square 4410 4 steamers, 1 miss.  appendicitis patient, radio direction finder out of service.
  11.55  
17.02.40 08.40 Alpha 732 Square 4216, Zet Gamma 2, Gamma Lucie, Xant Max.
    0520/17/83                                                            U-18
17.02.40 10.57 1035/17/87 Am in fog and ice close to Lightship Fritz.  Request fog signals.
  19.59  
 
     
     
     
 
- 4 -
  
     
 
17.02.40 16.02 Alpha 193 Gustav Gelb square BF 7543 Delta 210 Lamda Gustav.  U-37                                                          
  17.04 1405/17/42
17.02.40 23.50 Alpha 606 Gustav Gelb square CG 2226.    U-53
    .  .  .  .  .  .  
18.02.40 04.36 Alpha 053 Gustav Gelb square 1491 Gamma Quatsch.    U-19
    0025/18/1  
18.02.40 04.40 Alpha 301 Otto Zet 20, Lamda Max.    U-19
    0050/18/2  
18.02.40 04.44 Alpha 736 Öse Emil, Delta 4, Gamma 1.    U-19
    0220/18/5  
18.02.40 04.56 Alpha 812 Gustav Gelb square 1632 Gamma Quatsch.    U-23
    0510/18.5  
18.02.40 05.00 0300/18/6 B.d.U. from U-57.  GRETAFIELD 2 hits, 2 destroyers missed shots.  Still one torpedo.  Scapa arrival heavy cruiser 2 destroyers.
  08.43  
18.02.40 05.08 Alpha 822 Gustav Gelb, square BF 7885, delta 345.    U-53
    0333/18/56  
17.02.40 23.37 2203/17/96 B.d.U. from U-14.  Square 6119, position 19 February 00.00 hours at the eastern edge of the warning area.  Miss was early detonator G 7 E.
18.02.40 09.37 0527/18/8 B.d.U. from U-23.  Non-detonator G 7 E, depth 4 meters, range 300 meters.  5000 ton steamer, certain data.
  11.43  
18.02.40 08.37 0420/18/7 B.d.U. from U-23.  Convoy square 1698.  Course 180°, U-boat in the middle behind.  Port aft destroyer sunk.      U-23
  11.47  
18.02.40 10.25 Alpha 180 Gustav Gelb square BF 7837 Delta 10.    U-53
    08.00/18/61  
18.02.40 10.34 Alpha 509 Gustav Gelb square BE 7832 Delta 20.    U-53
    0916/18/62  
18.02.40 12.10 Alpha 182 Gamma Viktor, square BF 7835, Delta 30, Lamda 8.      U-37                                                          
  12.48 0850/18/68
18.02.40 16.53 Alpha 013 Emil Delta square BF 7942.   U-53
    1400/18/71  
18.02.40 22.47 Alpha 556 Gustav Gelb, square 1639, Gamma Anton, Otto Zet 22, Öse Emil, Delta 5, Gamma 1, Aircraft 4.    U-23
    1700/18/13
18.02.40 22.50 Alpha 755 Square 4115, Beta 1, Delta 1, Lamda 2, Gamma Toni, Lamda Max.    U-18
    2030/18/24
 
     
     
     
 
- 5 -
  
     
 
18.02.40 23.32 Alpha 848 Gustav Gelb square 1625.  Gamma Toni Otto Zet 20, Öse Emil, Delta.
19.02.40 04.35 2255/18/24
18.02.40 24.40 1740/18/14 B.d.U. from U-23.  With reported convoy U-boat S-Class proceeds ahead, destroyer B&E Class.    U-23
19.02.40 04.39 2345/18/25 B.d.U. from U-23.  3 enemy destroyers square 2117 easterly course, high speed, apparently reconnaissance line.
  08.57  
19.02.40 04.34 Alpha 451 Delta 4, Gamma Karl, Lamda Max square 1633.    U-22
    . . . . /19/27  
19.02.40 05.31 0342/19/28 B.d.U. from U-10.  Return transit 19 February 04.00 hours square Karl 674.  2 steamers 1 G 7 E early detonator, steamer probably sunk.  1 G 7 a miss.
  13.32  
       
        Officer-Only Radio Messages   
26.01.40 19.24 1736/26/65 B.d.U. from U-44.  Because return transit is not certain without supply, execution not possible, all Radio Messages received
  20.50  
28.01.40 21.39 2103/28/33 B.d.U. from U-44.  Square CG 1888.  Greek sunk.  Have begun return transit.
  22.17  
  00.20    
       
       
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