U-552 - 8th War Patrol

Translation by Jerry Mason with the help of Ken Dunn

Departed
Date
Arrived
Date
Days at Sea
St. Nazaire
7 March 1942
St. Nazaire
27 April 1942
52

 

Click the icon to download a KMZ file displaying the U-boat track, significant events and locations for this patrol.  You must have Google Earth loaded on your computer to view this file.  Download Google Earth here

Ships Attacked
Date
KTB Time
Position
Ship
Tons
Nationality
Convoy
25 Mar 42
08.13
42°33'N, 64°22'W
OCANA
6,256
Netherlands
3 Apr 42
03.10 - 03.40
37°57'N, 75°02'W
DAVID H. ATWATER
2,438
American
5 Apr 42
04.47
36°15'N, 75°42'W
BYRON D. BENSON
7,953
American
7 Apr 42
04.17
35°09'N, 75°10'W
BRITISH SPLENDOUR
7,138
British
7 Apr 42
10.52
35°03'N, 75°26'W
LANCING
7,866
Norwegian
9 Apr 42
09.38 - 10.00
34°27'N, 76°22'W
ATLAS
7,137
American
10 Apr 42
06.27
34°21'N, 75°58'W
TAMAULIPAS
6,943
American
     
 Total = 45,731
   
Note:  The positions in the table above and in the Google Earth patrol summary are derived from the KTB and in many cases do not match those set forth in authoritative references such as Jürgen Rohwer, Axis Submarine Successes of World War Two or the Uboat.net website.  The goal here is to present the picture relative to the U-boat and not the absolute position that the ship was attacked or sank.


 
 
           
           
           
           
                                                        Copy No.   
           
                                               
           
                                               K  r  i  e  g  s  t  a  g  e  b  u  c  h  
                                               = = = = = = = = = = = = = = = =  
                       of  
                                     U  n  t  e  r  s  e  e  b  o  o  t  e  s    "  5  5  2  "  
                                    = = = = = = = = = = = = = = = = = = = = = = =  
           
                                         Kommandant:  Kaptlt.  T  o  p  p  .  
           
     
   
 
 
          Beginning:                     28 January 1942
          Ending:                         27 April     1942
 
 
           
     
          Distribution:    
          7. Unterseebootsflottille
Copy No.
1
          Befehlshaber der Unterseeboote,
"      "
2
          2. Admiral der Unterseeboote,
"      "
3
          Oberkommando der Kriegsmarine
"      "
4+5
 
           
           
     
          Enclosures:
          1 Track chart for copy No. 1-5
          14 Torpedo firing reports for copy No. 1-2
          Summary of the General  Radio Log for copy No. 2-4
          11 Combat sketches for copy No. 1
          Original of General Radio Log for copy No. 1
 
           
           
           
           
        © U-boat Archive 2014  - all rights reserved  
Click the flag to view the above page from the original German KTB
 
- 1 -
 
           
           
           
           
    28.01.42   Torpedo offload (2 Ato), clearing the boat.  
    29.01.42   Charge voltage equalization of all battery cells.  
    30.01.42   Begin shipyard period.  
    31.01.42   Boat dry-docked.  
    17.02.42 -   Boat undocked.  
    23.02.42   Shipyard work, adjustment of the stem and overhaul of the bow caps of the torpedo tubes.  
    24.02.42   Dockyard testing.  
    25.02.42   Sea trial, radio direction finder calibration, shipyard trim test.  
    26.02.42      
    18.00   Trim test with repetition of piston firing [of torpedo tubes].  Dry-docked due to a leak in the lower manhole of main ballast tank 5.  
    27.02.42   Undocked, degaussing.  
    15.00   Rammed at the level of main ballast tank 5.  
    18.00   Dry-docked, torpedo unloading.  
    04.03.42   Work on main ballast tank 5 and torpedo tube V.  
    05.03.42      
    11.00   Undocked, followed by diving for exercise torpedo and piston firing.  
    14.00   Torpedo loading.  
    20.00   Dry-docked for elimination of leak in main ballast tank 5.  
    06.03.42      
    09.00   Undocked, followed by piston firing.  
    13.00   Provisions loading.  
    07.03.42      
    13.00   Fresh provisions loading.  
    17.00   Put to sea from St, Nazaire.  
    20.00   Passed Point Nanni 1.  Test dive.  Attack periscope fogged.  If attempt to dry fails, only the forward periscope is in service.  No reason to turn back.  
    24.00 BF 6495 Day's run:  Surfaced      56.0 nm,  
      SW 2, Sea 1, cloudless, Vis. medium                  Submerged    0.4 nm.  
                                                                     
    08.03.42      
    04.00 BF 6478 Encountered several dimmed fishing vessels.  
      SW 1-2, Sea 1, cloudless, Vis. moderate to medium    
    08.00 BF 5586    
      SW 2, Sea 0-1, cloudless, Vis. medium to good    
           
           
           
Sun and Moon Data 07.03.42
Sun and Moon Data 08.03.42
 
- 2 -
 
           
           
           
    continued      
    08.03.42      
    10.00   Crash dive for training.  
    10.34   Dried periscope steams up again after a few hours, seems to be leaking.  
    12.00 BF 5571    
      SE 3, Sea 2, nearly cloudless, Vis. good    
    15.17 - 16.30   Crash dive for training.  Deep diving test depth A +20 meters.  
    20.00 BF 4693    
      SE 5, Sea 4-5, nearly overcast, Vis. medium    
    24.00 BF 4657 Day's run:  Surfaced      212.0 nm,  
      SE 6, Sea 5, nearly totally overcast, Vis. medium, swells                  Submerged    3.35 nm.  
                                                                     
    09.03.42      
    04.00 BF 4569    
      SE 5, Sea 4, totally overcast, Vis. medium, medium swell    
    08.00 BF 4554    
      SE 4, Sea 3-4, totally overcast, Vis. moderate to medium    
    12.00 BF 4438    
      SE 4-5, Sea 4, totally overcast, Vis. medium, swells    
    16.00 BF 4425    
      SSE 4, Sea 3-4, totally overcast, Vis. medium to good, medium swell    
    18.10 BF 4418 Crash dive for aircraft.  Type not made out.  
    18.52   Surfaced.  
    19.30   Passed drifting mine.  
    20.00 BE 6636    
      SbyE 4-5, Sea 3-4, nearly half overcast, Vis. good, swells    
    22.26   Passing report sent:  
        My position is BE 66.  
    23.58   Topp gave passing report from naval square BE 66.  
    24.00 BE 6617 Day's run:  Surfaced      206.0 nm,  
      S 4, Sea 4-5, nearly partly overcast, Vis. medium                  Submerged       2.5 nm.  
                                                                     
    10.03.42      
    04.00 BE 6528    
      S 3-4, Sea 3, nearly partly overcast, Vis. medium    
           
Sun and Moon Data 08.03.42
Sun and Moon Data 09.03.42
Sun and Moon Data 10.03.42
 
- 3 -
 
           
           
           
    continued      
    10.03.42      
    08.00 BE 6514    
      SbyW 3-4, Sea 2-3, totally overcast, Vis, moderate, swells, rain    
    12.00 BE 6425, SbyE 4, Sea 3-4, totally overcast, Vis. medium    
    16.00 BE 5636    
      SbyE 4, Sea 3, totally overcast, Vis. medium    
    20.00 BE 5622    
      SSE 6, Sea 5, totally overcast, Vis. moderate, scattered rain    
    24.00 BE 5533 Day's run:  Surfaced      192 nm  
      SbyE 6, Sea 5, totally overcast, Vis. bad to medium    
                                                                     
    11.03.42      
    04.00 BE 5522    
      SSE 6, Sea 5, few clouds, Vis. moderate, medium long swell    
    08.00 BE 5511    
      S 5, Sea 5, totally overcast, Vis. bad    
    09.00   Served as radio repeater for Ites.  
    12.00 BE 5189    
      SSE 6, Sea 5-6, totally overcast, Vis. medium to good    
    16.00 BE 5178    
      SSE 4, Sea 3, totally overcast, Vis. bad to medium, medium long swell    
    19.27   Radio Message:  
        1,)  On 12 March between 01.00 hours and 05.00 hours report weather Topp, Hartenstein, Loeser, Schuch and Kröning.  
        2.)  . . . . . . . .  
    20.00 BE 4383    
      S 4-5, Sea 4-5, several clouds, Vis. medium to good    
    24.00 BE 4372    
      S 5-6, Sea 4-5, several clouds, Vis. medium to good, medium-long swell    
        Difference between dead reckoning and actual position 70°T, 27.5 nm.  
        Day's run:  Surfaced  145 nm.  
           
Sun and Moon Data 10.03.42
Sun and Moon Data 11.03.42
 
- 4 -
 
           
           
           
           
    12.03.42      
    02.05   Sent weather Short Signal.  
        Radio Message:  48°N, 22°W, steady 994 mb, +13°C, fair weather Cumulus, Vis. over 10 nm, S 5-6, medium high S-swell.  
    04.00 BE 4372    
      SbyW 6, Sea 4-5, several clouds, Vis, medium to good    
    08.00 BE 4267    
      S 4-5, Sea 4, for the most part overcast, Vis. medium    
    12.00 BE 4272    
      S 5-6, Sea 4-5, partly overcast, Vis. good    
    16.00 BE 4191    
      SSW 6-7, Sea 5-6, nearly cloudless, Vis. good    
    19.00   Radio Message:  On 13 March at 08.00 hours go to the following circuits.  
        Topp, Oestermann, to Greenland Circuit, Wattenberg, Hartenstein to Ireland Circuit.  
    20.00 BE 4173    
      SW 4, Sea 5-4, partly overcast, Vis. good, swells    
    24.00 BD 6391 Difference between dead reckoning and actual position 285°T 2 nm, 40°T 6 nm.  
      SbyW 3-4, Sea 2-3, nearly cloudless, Vis. good, swells  
        Day's run:  Surfaced      174 nm.  
                                                                     
    13.03.42      
    04.00 BD 6376    
      SSW 3-4, Sea 2-3, nearly cloudless, Vis. good, swells    
    08.00 BD 6295    
      WSW 4, Sea 3-4, totally overcast, rain, Vis. bad to medium    
    12.00 BD 6284 Each morning the attack periscope has 45% humidity, is dried to 20%, is temporarily ready and fogs again after a few hours.  Apparently leaking.  
      S 3, Sea 2-3, quite overcast, Vis. good, light swell  
    16.00 BD 6198    
      SEbyS 5-6, Sea 4-5, zml. overcast, Vis. good, swells    
    20.00 BD 6421    
      WNW 3, Sea 1-2, partial overcast, Vis. very good, light swell    
           
Sun and Moon Data 12.03.42
Sun and Moon Data 13.03.42
 
- 5 -
 
           
           
           
    continued      
    13.03.42      
    24.00 BD 5633 Day's run:  Surfaced  176 nm.  
      NW 2, Sea 1-2, partial overcast, Vis. good, light swell    
                                                                     
    14.03.42      
    04.00 BD 5621 After a day of continuous venting it was determined:  
      NW 1-2, Sea 0-1, nearly cloudless, Vis. medium, swells 1)  In spite of careful lubrication excess pressure in the depth keeping mechanism.  
    [the entry at right refers to the torpedo depth keeping mechanism - see B.d.U. KTB 23 Feb 42] 2.)  Permanent air-bleed valve stuck. Müller reports the same in a radio message, therefore, refrain from own message.  
    08.00 BD 5536    
      NNE 4-5, Sea 3-4, multiple clouds, Vis. medium, swells    
    12.00 BD 5525    
      WbyN 5, Sea 4-5, partial overcast, Vis. good, medium swell    
    12.15   Crash dive for training.  
    12.47   Surfaced.  
    16.00 BD 5517    
      WbyS 3-4, Sea 2-3, for the most part overcast, Vis. very good, NW-swell    
    19.05   Crash dive for training.  
    19.15   Surfaced.  
    19.25   Radio Message to Varendorff, Topp, Gericke, Heyse, Poske.  On 15 March send weather report between 01.00 hours and 05.00 hours.  
    20.00 BD 5429    
      SWbyW 3-4, Sea 2-3, few clouds, Vis. very good, swells    
    24.00 BD 4663 Difference between dead reckoning and actual position after a navigation fix:  278°T 5 nm, 283°T 5.2 nm.  
      SW 3-4, Sea 3, partial overcast, Vis. medium, swells  
      Day's run:  Surfaced      183.0 nm,  
                       Submerged       2.5 nm.  
                                                                     
    15.03.42      
    04.00 BD 4652    
      SE 2-3, Sea 2, few clouds, Vis. good, medium-long swells    
    04.39   Radio Message Short Signal weather report sent:  
        47°N 35°W, rising 978 mb, +10°C, SE, cloudless, Vis. 5 nm, NW-swell.  
           
Sun and Moon Data 13.03.42
Sun and Moon Data 14.03.42
Sun and Moon Data 15.03.42
 
- 6 -
 
           
           
           
    continued      
    15.03.42      
    08.00 BD 4566    
      SE 2-5, Sea 2, partial overcast, Vis. good, medium-long swell    
    12.00 BD 4558    
      NNW 5, Sea 4, few clouds, Vis. very good, long swell    
    16.00 BD 4571    
      N 3-4, Sea 2-3, heavily cloudy, Vis. good, swell    
    20.00 BD 4485    
      NbyE 5, Sea 4, nearly totally overcast, Vis. good, long swell    
    24.00 BD 4474 Difference between dead reckoning and actual position after a navigation fix:  140°T, 5 nm.  
      NbyE 7, Sea 5, totally overcast, high swell  
      Day's run:  Surfaced      181 nm.  
                                                                     
    16.03.42      
    04.00 BC 6689    
      NW 7, Sea 6-7, totally overcast, Vis. bad to medium, high swell    
    08.00 BC 6912    
      NW 6-7, Sea 5-6, heavily cloudy, Vis. medium, high swell    
    12.00 BC 6834    
      NNW 7-8, Sea 7, nearly completely overcast, Vis. medium, rain showers, long swell    
    16.00 BC 6819    
      NW 5-6, Sea 4-5, nearly overcast, Vis. good, slight Swell    
    18.47   Crash dive for training.  Submerged training.  
    20.14 BC 6763 Surfaced.  
      NNW 3, Sea 2-3, totally overcast, Vis. good, swell    
    24.00 BC 6755 Day's run:  Surfaced      170.0 nm,  
      NbyE 3-4, Sea 2-3, nearly completely overcast, Vis. good, swells                  Submerged       4.5 nm.  
                                                                     
    17.03.42      
    04.00 BC 5969    
      NNE 3-4, Sea 3, totally overcast, Vis. medium to good, slight swell.    
           
Sun and Moon Data 15.03.42
Sun and Moon Data 16.03.42
Sun and Moon Data 17.03.42
 
- 7 -
 
           
           
           
    continued      
    17.03.42      
    08.00 BC 5982    
      NNW 3-4, Sea 3, partial overcast, Vis. bad to medium, slight swell    
    09.00 - 09.15   Silent crash dive.  
    12.00 BC 5977 During the day strong temperature drop.  Meeting the cold wall [inner wall of the Gulf stream] clearly ascertainable.  Lowering of the temperature and salt content.  
      WNW 3-4, Sea 2-3, totally overcast, Vis. very good, slight swell  
    16.00 BC 8223    
      NW 4, Sea 3, nearly completely overcast, Vis. good, slight swell    
    20.00 BC 5879    
      NNW 2, Sea 1, nearly overcast, Vis. medium, snow, hail    
    24.00 BC 8215 Clocks set back 4 hours.  
      NNW 4-5, Sea 3-4, nearly overcast, Vis. medium, rain shower Difference between dead reckoning and actual position after a navigation fix:  71°T, 33 nm.  
      Day's run:  Surfaced      208.0 nm,  
                       Submerged      0.75 nm.  
                                                                     
    18.03.42      
    04.00 BC 8161    
      NNW 4-5, totally overcast, Vis. bad to moderate    
    08.00 BC 8146    
      NNW 4-5, Sea 3-4, totally overcast, Vis. moderate to bad    
    12.00 BC 7392    
      NNW 4-5, Sea 3-4, totally overcast, Vis. good, air temperature -1°C, water temperature +5°C    
    16.00 BC 7378    
      NbyW 1, Sea 0-1, heavily cloudy, Vis. very good, slight swell    
    20.00 BC 7535    
      SbyE 3, Sea 2, nearly completely overcast, Vis. good    
    24.00 BC 7551 Difference between dead reckoning and actual position after a navigation fix:  251°T, 11.5 nm.  
      SbyE 5-6, Sea 5, completely overcast, Vis. medium to good, rain  
      Day's run:  Surfaced      189 nm.  
                                                                     
    19.03.42      
    04.00 BC 7469    
      SSE 6, Sea 5, totally overcast, Vis. very bad, fog, swells    
           
Sun and Moon Data 17.03.42
Sun and Moon Data 18.03.42
Sun and Moon Data 19.03.42
 
- 8 -
 
           
           
           
    continued      
    19.03.42      
    08.00 BC 7486    
      Submerged    
    12.00 BC 7712    
      SSE 10, Sea 9, cloudless, Vis. medium to moderate, high swell    
    13.06   Silent crash dive.  Proceeded submerged due to bad weather.  Proceeding on the surface against the sea consumes too much fuel.  
    18.30   Surfaced.  
    19.25   Again submerged due to bad weather.  
    24.00 BB 9952 Surfaced.  
        Day's run:  Surfaced      87 nm,  
                         Submerged   24 nm.  
                                                                     
    20.03.42      
    03.00   Battery charged.  Due to unchanged bad weather dived.  Proceeded submerged.  
    08.42 BB 9949 Surfaced, boat ventilated.  
    09.15   Again submerged.  
    13.00 BB 9948 Surfaced, weather situations somewhat better.  Ran 20° from directly into the sea, course 220° rather than course 245°.  
    16.00 BB 9947    
      Submerged    
    17.41   Radio Message tomorrow between 01.00 hours and 05.00 hours report weather by Short Signal:  
        Mützelburg, Laßen, Bülow, Topp.  
    20.00 BB 9896 Dived again.  Proceeding against the high WSW-sea the boat makes only slow speed with high fuel consumption.  
      WbyS 8, Sea 7, heavily cloudy, Vis. good, very high swell  
    24.00 None Day's run:  Surfaced      45.25 nm,  
                         Submerged   20.20 nm.  
                                                                     
    21.03.42      
    01.00 CC 1326    
      WbyS 7-8, Sea 7, Vis. good, rain, hail    
    02.15   Dived due to weather.  
           
           
Sun and Moon Data 19.03.42
Sun and Moon Data 20.03.42
Sun and Moon Data 21.03.42
 
- 9 -
 
           
           
           
    continued      
    21.03.42      
    06.12   Radio Message Weather Short Signal sent:  
        43°N, 54°W, rising 1002 mb, +3°C, W 9-10, 6-9/10, Vis. over 10 nm, high swell.  
        Delay due to failure of the radio inverter.  
    08.30 CC 1327    
      WNW 8, Sea 7, nearly completely overcast, Vis. good, heavy swell    
    11.00   Dived due to weather situation.  
    17.00 CC 1342 Surfaced.  
    20.00 CC 1344 Radio Message (Officer-Only).  
      Submerged According to Radio Intercept Service convoy 21 March Halifax for England, assembly point at 60° 40'W, and at 43° 15'N, or 44° 15'N.  The latter latitude probably at Sable Island.  
        Means for me 300 nm against the seas, therefore did not operate on it.  
    21.06   Radio Message per Outbound Orders report concerning fuel consumption passing 55°W:  still have 100 cbm on board.  
    21.55   Radio Message Topp reports a fuel inventory of 100 tons.  
    24.00 CC 1267 Day's run:  Surfaced      56.0 nm,  
      NNW 7, Sea 6-7, totally overcast, Vis. good, high swell                  Submerged   19.5 nm.  
         
                                                                     
    22.03.42      
    04.00 CC 1518    
      NbyW 6-7, Sea 6, nearly completely overcast, Vis. good    
    08.00 CC 1465    
      NWbyN 6, Sea 5, totally overcast, Vis. good    
    12.00 CC 1482    
      NNW 3, Sea 2-3, totally overcast, Vis. good    
    16.00 CB 3699    
      WbyN 1, Sea 0-1, partial overcast, Vis. very good, confused swell    
    17.32   Radio Message:  KR KR from Bülow.  
        Convoy naval square 5119, 2 cruisers, 5 large ships, 6 destroyers, main course 230°, 12 knots, no contact due to fuel.  
        Did not operate  
        1)  because interception is unlikely without contact keeping reports,  
        2)  because I would have to maintain 2 x HF for 18 hours  
           
Sun and Moon Data 21.03.42
Sun and Moon Data 22.03.42
 
- 10 -
 
           
           
           
    continued      
    22.03.42   and then probably during the day still must maintain 12 knots.  
    20.00 CB 3924    
      SEbyE 3-4, totally overcast, Vis. good    
    24.00 CB 3839 Day's run:  Surfaced  192 nm.  
      SEbyS 7, Sea 6-7, totally overcast, Vis. medium    
                                                                     
    23.03.42      
    04.00 CB 3855    
      W 6, Sea 5-6, totally overcast, rain, Vis. moderate    
    06.55   Dived due to bad weather.  
    12.00 CB 3847 Surfaced.  
      Submerged    
    16.00 CB 3789    
      W 5, Sea 4-5, nearly cloudless, Vis. very good    
    20.00 CB 6111    
      SE 4, Sea 3, completely overcast, rain    
    24.00 CB 5325 Day's run:  Surfaced      156.8 nm,  
      WbyN 2, Sea 1, heavily cloudy, Vis. very good                  Submerged      7.5 nm.  
                                                                     
    24.03.42      
    00.30   Smoke cloud in sight bearing 40°T.  Closed at high speed.  
    01.30   Convoy in sight.  
    02.19   Radio Message Short Signal.  Convoy in sight square CB 2984, course 300°, speed 10 knots.        U-552.  
        Moonlit night, sighted 5-6 large steamers, a large warship, many destroyers.  Suspect I have the Bülow group.  
    02.57   Radio Message Short Signal.  The reported enemy convoy located square 2977, course 270°, speed 12 knots.  U-552.  
        Holding contact at 2 x HF.  However not gaining ground against the seas.  
    04.00 CB 5233    
      WbyN 3, Sea 2, heavily cloudy, Vis. very good    
    04.30   Therefore pursuit broken off.  
    05.00   Radio Message from Topp.  Pursuit broken off.  14 knots against the sea naval square CB 5232, 95 cbm, last course 250°.  
           
           
           
Sun and Moon Data 22.03.42
Sun and Moon Data 23.03.42
Sun and Moon Data 24.03.42
 
- 11 -
 
           
           
           
    continued      
    24.03.42      
    08.00 CB 5211    
      WbyN 3, Sea 2, completely overcast, Vis. moderate    
    12.00 CB 5125    
      W 1-2, Sea 0-1, nearly completely overcast, Vis. medium    
    12.07   In the morning twilight tanker in sight.  Hung on at the limit of visibility, runs at 10 knots, general course 340°.  Held contact all day.  Day attack hopeless because enemy zig zags too heavily.  
    16.00 CB 2741    
      WbyN 2, Sea 1, totally overcast    
    20.00 CB 2713    
      WbyN 5, Sea 4, partial overcast, Vis. good    
    24.00 CB 2444 Day's run:  Surfaced  234 nm.  
      WNW 4, Sea 4-5, nearly partial overcast, Vis. good    
                                                                     
    25.03.42      
    00.30   Beginning of twilight.  Moonlit night, no clouds in the sky.  Surface attack must take place from long range.  
    04.10 CB 1392 Dived for submerged attack.  Tanker clearly distinguished.  Shortly after diving [the tanker] stopped.  Closed for attack.  At range = 1000 meters the tanker increases speed and turns hard towards me. Quickly to depth 20 meters.  The tanker overruns the boat and runs on at high speed.  
      WbyN 4-5, Sea 4, cloudless, light swell  
    04.45   Surfaced, again continued, tanker now zig zags slightly.  
    05.40   Attempt a surface attack.  Tanker comes towards me with sharp target angle after a zig zag.  Also [the boat] approached at a sharp target angle at KF.  At approximately 3000 meters range tanker stops, the approach continued.  Tanker turns while stopping. [The boat] Ran off further, tanker gets under way, on the old course at a sharp target angle towards me.  If he had seen me, he would certainly have turned.  
    06.40   Dived for a new submerged approach.  
        Tanker is clearly distinguished.  Comes towards me at a sharp target angle.  Then the same as the first time, the tanker stops, turns, as I continued to approach, turns towards me at high speed and overruns the boat.  
        Usually I am not so inclined however, all the enemy maneuvers relate to my attacking boat, these repeated counteractions to my attacks make me suspicious.  
           
           
Sun and Moon Data 24.03.42
Sun and Moon Data 25.03.42
 
- 12 -
 
           
           
           
    continued      
    25.03.42      
    07.00   Surfaced.  Will wait until the moon disappears, visibility is very poor.  
    07.50   After renewed maneuver ahead for attack.  Boat comes too close. Collision is avoided only by both engines back AK. The enemy passes 5 meters from the stern.  On the stern there is a cannon which is not manned. Steamer transmits.  The sure sign that he has now detected me with certainty.  Perhaps the other cases were assumptions on the basis of equipment aboard the tanker. Steamer transmits:  
        S S S "OSANA", followed by a submarine.  Turn hard behind the tanker stern for a new attack.  
    08.13 CB 1363 Tube II shot.  Range = 1800 meters, target speed = 9 knots, depth 3 meters.  After a running time of one minute 58 seconds a detonation.  Tanker rises in flames and burns several hours.  Went closer.  Tanker has settled noticeably deeper.  The oil is forced out everywhere under the water pressure and blazes as from enormous nozzles. Did not wait for sinking.  Ran off to the west.  Avoided several fishermen with set lights.  
      WSW 3-4, Sea 3, cloudless, Vis. medium  
    12.00 CB 1351 Dived for motor sailer.  Tanker still burning.  Remained submerged to save fuel.  Many Asdic or depth sounding impulses heard.  
      WSW 4, Sea 3, cloudless, Vis. good  
    16.00 CB 1354 About 10-15 depth charges at great range.  
    18.42 - 19.00   Surfaced and ventilated the boat.  
    19.15 CB 1346 Put the boat on the bottom depth A +20 meters.  
        In the course of the afternoon a further 20 depth charges at medium to great range.  
    24.00 CB 1345 Surfaced.  Difference between dead reckoning and actual position after a navigation fix:  90°T 1.8 nm, 228°T 16.4 nm.   
      WbyN 4-5, Sea 4-5, nearly cloudless, Vis. good  
      Day's run:  Surfaced      107 nm,  
                         Submerged   8.3 nm.  
                                                                     
    26.03.42      
    04.00 CB 1289 On course for the Nantucket lightship avoided several fishermen with set lights.  
      WNW 3-4, Sea 3, cloudless, Vis. good  
    08.00 CB 1515    
      NWbyW 4, Sea 3, cloudless, Vis. good    
    12.00 CB 1464    
      NW 4-5, Sea 4, cloudless, Vis. good    
           
Sun and Moon Data 25.03.42
Sun and Moon Data 26.03.42
 
- 13 -
 
           
           
           
    continued      
    26.03.42      
    16.00 CB 1473    
      NbyW 6, Sea 5-6, partial overcast, Vis. very good    
    19.03   Crash dive for land-based aircraft on parallel course.  
    19.20   Surfaced.  
    20.00 CA 3699    
      NbyW 6, partial overcast, Vis. good    
    24.00 CA 3913 Difference between dead reckoning and actual position after a navigation fix:  180°T 14 nm, 57°T 3 nm.   
      N 6, Sea 5, partial overcast, Vis. very good  
      Day's run:  Surfaced      163 nm.  
                                                                     
    27.03.42      
    04.00 CA 3593 Very bright night.  
      N 3-4, Sea 3, nearly cloudless, Vis. good    
    08.00 CA 3556 Pollock lightship in sight.  Closed and drove parallel to the coast from buoy to buoy.  Except for some fishermen and some small motor vessels with set lights no traffic.  All lighthouses are lit.  
      WNW 2-3, Sea 2-3, nearly completely overcast, Vis. good  
    11.30   At the beginning of twilight put the boat on the bottom at depth 60 meters about 8 nm off the coast at the latitude of "Nanset Beach" Lighthouse.  
        Very cold in the boat.  
        Continuous sound bearings during the long day result in:  No traffic under the coast except for small motor vessels, that reamain in our vicinity.  
    16.00   A depth charge at medium range.  
    24.00   Off the bottom.  
        Day's run:  Surfaced      77 nm,  
                         Submerged   0.3 nm.  
                                                                     
    28.03.42      
    01.40   Surfaced.  
        Boat remains on the surface back and forth at the coast.  Moonlit night.  
    07.50   Went to periscope depth for approaching dimmed motor vessel.  Type fast boat.  
    08.50 Abeam Nanset Beach Surfaced.  
    11.23   At the beginning of twilight put the boat on the bottom.  During the entire day again nothing heard.  
    24.00   Off the bottom.  
        Day's run:  Surfaced  55.7 nm, Submerged  4 nm.  
                                                                     
           
Sun and Moon Data 26.03.42
Sun and Moon Data 27.03.42
Sun and Moon Data 28.03.42
 
- 14 -
 
           
           
           
           
    29.03.42      
    01.30   Surfaced.  Start for CA 50.  
    04.00 CA 3564    
      EbyS 2, Sea 1-2, nearly completely overcast, Vis. medium to good, slight swell Avoided fishermen.  
    08.00 CA 3599    
      EbyS 3, Sea 2, cloudless, Vis. good    
    12.00 CA 3944    
      E 3, Sea 2-3, cloudless, Vis. very good    
    14.12 CA 3896 Crash dive for aircraft, land-based aircraft.  
    15.06   Surfaced.  
    16.00 CA 3898    
      E 5, Sea 4-5, cloudless, Vis. very good    
    20.00 CA 6251    
      E 5-6, Sea 4-5, partial overcast, Vis. good    
    24.00 CA 6199 Surfaced.  Difference between dead reckoning and actual position after a navigation fix:  177°T 10 nm, 243°T 10 nm.   
      ENE 7-8, Sea 6-7, partial overcast, Vis. good  
      Day's run:  Surfaced      204 nm,  
                         Submerged   0.45 nm.  
                                                                     
    30.03.42      
    04.00 CA 6427    
      E 7, Sea 6-7, totally overcast, Vis. medium    
    08.00 CA 5666    
      SbyW 4-5, Sea 3-4, totally overcast, rain, Vis. medium, high long swell    
    12.00 CA 5681    
      WbyN 5, Sea 4, heavily cloudy, Vis. medium, EbyN-swell    
    16.00 CA 5596    
      NWbyN 6, Sea 5, totally overcast, Vis. very good 38° 15.5'N  
      74° 26'W  
    20.00 CA 5821    
      WbyS 4-5, Sea 4-5, cloudless, Vis. good    
    24.00 CA 5736 Surfaced.  Difference between dead reckoning and actual position after a navigation fix:  15°T 9.5 nm.  
      SW 3-4, Sea 3, few clouds, Vis. very good  
      Day's run:  Surfaced  180 nm,  
                                                                     
    31.03.42      
    04.00 CA 5728 New buoy in place.  Exact position:  
      SW 1-2, Sea 1, nearly cloudless, Vis. medium to good Phi = 38° 15.5'N,        Identifier:  white xxxxx  
      Lambda = 74° 26'W  
           
Sun and Moon Data 29.03.42
Sun and Moon Data 30.03.42
Sun and Moon Data 31.03.42
 
- 15 -
 
           
           
           
    continued      
    31.03.42      
    07.00   Winter Quarter Lightship, position reached.  Set off to the SSW on the 20-meter line.  No traffic observed, despite full moon night, that is to say good visibility.  
    08.00 CA 5748    
      S 1-2, Sea 1, cloudless, Vis. medium    
    12.00 CA 4999 Put the boat on the bottom.  
      SSE 2, Sea 1, nearly completely overcast, Vis. medium    
    15.50   At periscope depth.  G.H.G. reports propeller sounds, 4 steamers.  Nothing seen.  Conductivity of the water must be very great.  
    16.34   Boat put on the bottom.  
    18.40   At periscope depth.  5000 GRT steamer, shooting range too large, course north.  
    19.05   On the bottom.  
    19.42   At periscope depth.  6000 GRT steamer, course 30°.  Attack initiated from range = 2500 meters.  
    20.30 CA 4999 Shot from tube I.  Shooting data:  
        Target speed from RPM 6.5 knots.  
        Target angle by estimation 80°.  
        Range by estimation 2500 meters, depth 3 meters.  
        Miss  
    20.59   New propeller sounds.  2 tankers on southerly course, 1 tanker with northerly course in periscope.  
        Attack on an empty tanker nearest to me.  
    21.34   Shot from tube II.  Shooting data:  
        Target speed from RPM 8 knots, target angle from estimation 80°, range by estimation 700 meters,  depth 3 meters.  These maneuvers are all made with the forward periscope in the smooth sea and swell.  Shortly before shooting the periscope cuts under. Target angle on emerging is 100-110.  However still shot.   Probably the reason for missing.  
    21.50   Aircraft in periscope.  Go deep, that is to say boat touches bottom at 18 meters.  Aircraft had not noticed me.  
    23.00   New propeller sounds.  At periscope depth.  Tanker 5000 GRT, course north.  
        Attempt attack.  Tanker drives in quite shallow water, sounds continually with Electrolot.  Shooting range is too great, about 3000 meters.  Again put the boat on the bottom at depth 20 meters.  
    24.00 CA 4993 Day's run:  Surfaced      30 nm,  
                         Submerged   9.69 nm.  
                                                                     
    01.04.42      
    01.27   In periscope sighted 10 steamers, heard but not seen another 9 steamers.  
        At periscope depth and surfaced.  
        Boat ventilated.  
    02.40   Boat put on the bottom.  
    03.20   Surfaced after sound report.  Surface pursuit:  without results.  
    03.44   Put the boat on the bottom.  No further sounds heard.  
           
Sun and Moon Data 31.03.42
Sun and Moon Data 01.04.42
 
- 16 -
 
           
           
           
    continued      
    01.04.42      
    08.00   Propeller sounds 80 RPM coming slowly nearer.  
    08.45   Surfaced.  Cloudless moonlit night.  Mirror flat.  2 steamers, 1 destroyer shadow.  Dived again, to view in periscope.  In G.H.G. can make out 1 steamer from the convoy and it shifts off to the east.  
    09.58   Surfaced.  Pursued at high speed.  Shadows still seen.  There are still 2 hours before the beginning of twilight.  After 1 hour have not closed.  Steamer runs at high speed.  
        Broke off; again headed for the 20-meter line north of the Winter Quarter Lightship.  
    12.15 CA 5744 Dived for shadow.  
        Steamer 4000 GRT coming with target angle 0° towards us.  Ready to attack.  Turn off for a stern shot.  Sure shooting data.  
    12.45 CA 5744 Shot from tube V.  Shooting data:  
        Target speed by propeller RPM 7.5 knots,  
        Target angle estimated 80°, range estimated 600 meters, depth 3 meters, miss (unexplained at the low range.)  
    12.50   Put the boat on the bottom.  
    14.27   At periscope depth.  In the G.H.G. fast running propeller sounds.  
        Destroyer, course 210°, target angle already 100°.  
    14.45   Put the boat on the bottom.  
    16.50   At periscope depth.  Sounds 120 RPM.  Tanker.  Range too great.  Aircraft.  
    17.17   On the bottom.  
    17.25   At periscope depth.  3 sound bearings.  3 steamers course for Cape Henry.  Long range.  Pursued at GF.  Reached the last steamer at range = 600 meters.  
    18.06   Shot from tube III.  Steamer is empty and about 6000 GRT.  Certain shooting data:  Target speed by estimate 9 knots,  target angle by estimate 80°, range estimated 1000 meters, depth 3 meters.  At shot angle 0° the torpedo ran 348°, in G.H.G. bearing exact.  
        Check of set values proved that the fire control installation worked correctly.  The error can lie only with the [torpedo] gyro assembly.  Miss.  
        Afterwards with quietly lying boat random check with the remaining torpedoes proved that the torpedoes were fine.  
    18.50   2 tankers in hopeless position.  
    19.05   On the bottom.  
    19.38   At periscope depth.  2 tankers, one full, course north, about 14000 GRT, one empty, course south, about 6000 GRT.  Attempt to reach shooting position at high speed.  
    19.52   An air ship is above me.  
        Want to get deep quickly and hit bottom at depth 13 meters.  He does not sight us.  
        Remain undetected and work slowly to depth 17 meters.  The large tanker can be heard up to 21.00 hours.  
    23.10   Fast runner coming from the east.  
        To periscope depth.  
        Patrol vessel, corvette type, target angle 0°, high speed.  Let boat settle to the bottom, depth 19 meters, with a lot of negative buoyancy.  Patrol vessel passes in the immediate  
           
           
           
Sun and Moon Data 01.04.42
 
- 17 -
 
           
           
           
    continued      
    01.04.42      
        vicinity and runs off towards Cape Henry.  
    24.00   On the bottom.  
        Day's run:  Surfaced      15 nm,  
                         Submerged   13.45 nm.  
                                                                     
    02.04.42   Altogether 9 steamers in the periscope, of these 5 tankers.  Apart from these heard 6 other steamers.  
    02.00   At periscope depth.  
        Surfaced.  Cloudless full moon night.  Mirror flat.  Ran off, to transfer torpedoes from the over deck.  
    04.00 CA 5748    
    04.10   Crash dive for sharp shadow.  Quite soon after the dive the vessel must have stopped.  Shortly thereafter started at high RPM.  Destroyer RPM.  
        Overran the boat, stopped again.  Runs toward the boat at slow RPM.  Stopped.  Put the boat on the bottom, depth 40 meters, everything turned off.  Destroyer works apparently only with sound locator.  
    05.16+   Boat overrun at high speed.  One depth charge, small caliber.  Slight damage.  Vents from [torpedo tubes] II and IV jump off.  Destroyer circles the boat once more, stopping repeatedly, over runs the boat once more and runs off.  
    05.30   Steamer sounds bearing 110°T, shifts slowly out to 130°T.  
    06.43   Surface.  Pursued the steamer.  
    08.00 CA 5784 Steamer still not in sight, dived to listen without results.  Pursuit broken off, plan to transfer over deck torpedoes put off.  Ran back again to the buoy line.   
      SW 3-4, Sea 3, nearly cloudless, Vis. good  
    12.20 CA 4996 Put the boat on the bottom, SW of the position of the Winter Quarter Lightship.  
    13.30   Fast runner, patrol ship.  
    16.00   At periscope depth.  Propeller sounds, 70 RPM.  Very great range.  
    17.03   On the bottom.  
    17.25   At periscope depth.  Large tanker, full, runs at high speed and comes to within 1500 meters.  
    18.15   Shot from tube III.  
        Sure shooting data.  Target speed by RPM 11 knots, target angle by estimate 90°, range by estimate 1500 meters, depth 4 meters.  Miss.  
    18.23   On the bottom.  
    18.31   Periscope depth.  3 steamers, all too far.  
    18.15   On the bottom.  
    20.00   Periscope depth.  
        1 steamer, two patrol vessels in the G.H.G.  
        Nothing seen in the periscope.  
    20.19   On the bottom.  
    20.25   Periscope depth.  2 steamers, no attack position.  
           
Sun and Moon Data 01.04.42
Sun and Moon Data 02.04.42
 
- 18 -
 
           
           
           
    continued      
    02.04.42      
    20.55   On the bottom.  
    21.05   Periscope depth.  2 steamers, 1 patrol vessel, range too great.  
    21.25   On the bottom.  
    21.35   Periscope depth.  Tanker.  No attack position.  
    22.28   On the bottom.  
    24.00   Day's run:  Surfaced      66.57 nm,  
                         Submerged   15.79 nm.  
                                                                     
    03.04.42      
    00.52   At periscope depth.  Steamer course north, target angle already 110°, makes only slow speed.  Run after submerged at LF.  Intend to surface at twilight, pursue and engage with artillery.  
    01.45   Destroyer in G.H.G. starboard abeam, shifting slowly astern.  
    01.57   Surfaced, steamer no longer seen.  
    02.45   Pursued, bright night.  
        Steamer again comes in sight.  
    03.51   Dived to listen, nothing heard of the destroyer in the vicinity.  
    02.58   Surfaced.  Ready for combat.  
        Steamer overtaken from astern.  
    03.10   Opened fire.  
        Steamer transmits.  It is the loaded steamer "DAVID H. ATWATER", 2438 GRT.   
    03.40   Ceased fire, steamer burning.  
        93 shots 8.8 cm, ran off at high speed.  Steamer sinks.  
    04.00 CA 5744    
    04.43   Crash dive for aircraft.  First sighted, when he was 30 meters over us.  Water depth 38 meters.  Aircraft had probably not sighted us.  
    05.20   Fast runner.  Patrol vessel, comes closer in the G.H.G. and ran off again.  
    06.26   Surfaced.  Ran off to the south.  
    08.00 CA 5776    
      SSW 4, Sea 3, nearly cloudless, Vis. medium    
    08.47   To Hardegen and Topp:  Tonight short situation report.  
    12.00 CA 8143    
      SW 4, Sea 3-4, nearly cloudless    
    12.30   Put the boat on the bottom.  
    16.50   At periscope depth.  Fast runner in the G.H.G., nothing seen.  
    17.20   Surfaced.  Horizon free, boat ventilated.  
    18.20   Put the boat on the bottom.  
    20.30   At periscope depth.  Steamer sounds in the G.H.G. bearing 150°T.  
        Steamer seen in the periscope, about 7000 GRT, 85 RPM.  At the same time fast runner bearing 300°T.  Wait until it is a little bit quieter and surface.  
           
           
           
Sun and Moon Data 02.04.42
Sun and Moon Data 03.04.42
 
- 19 -
 
           
           
           
    continued      
    03.04.42      
    20.50   Hazy horizon, Steamer not seen.  Pursued at high speed, after 1 hour still not in sight.  
    22.14   Dived to listen.  Clear bearing 157°T.   
    22.23   Surfaced, continued pursuit at high speed.  
    24.00 CA 8426 Surfaced.  Difference between dead reckoning and actual position after a navigation fix:  137°T, 4.7 nm.  
      SbyW 5, Sea 4, near partial overcast, Vis. medium to good  
        Day's run:  Surfaced      128.50 nm,  
                         Submerged      7.18 nm.  
                                                                     
    04.04.42      
    00.59   Steamer still not in sight.  Dived to listen at the beginning of twilight without results.  Steamer must have been faster than us.  Pursuit broken off.  Positioned outside my operations area in the vicinity of Cape Hatteras.  
        Set course for Wimble Shoal.  
    00.11 - 00.48   From Topp:  
        Situation:  3 days Cape Cod no traffic.  Cape May to Henry heavy traffic along the buoys.  Nights stopped.  Effective air and sea surveillance.  For 8 days high pressure weather conditions.  Cloudless moonlit nights.  75 cbm, main transmitter out of service, request radio repeater.  
        Continued:  
        25 March square CB 1363 OCANA loaded torpedoed.  4 hours burned out, destroyed.  3 April CA 5744 ATWATER sunk with artillery,  1 gyro failure, two unaccounted for, two accounted for misses in 18 meters by day.  6 plus 2 torpedoes, CA 7355.  
    04.00 CA 8481    
      SbyW 4-5, Sea 3-4, partial overcast, Vis. medium to good    
    08.00 CA 8477    
      SW 4-5, Sea 4, nearly cloudless, Vis. medium    
    10.35   Dived and north of the Wimble Shoal buoy put the boat on the bottom to listen.  
    11.48   Surfaced, boat ventilated.  
    12.10   Dived at the beginning of twilight.  1 escort vessel and 2 steamers at great range heard.   
    15.12   At periscope depth.  Piston steamer.  80 RPM, protected by aircraft.  
    15.30   On the bottom.  
    16.40   Periscope depth.  Piston steamer 70 RPM, no attack position.  
    17.12   On the bottom.  
    18.25   Periscope depth, piston steamer, also range too great.  
    18.30   On the bottom.  
    17.30 [time does not make sense] Periscope depth, tanker, 7000 GRT, range too great, 2000 meters.  
           
Sun and Moon Data 03.04.42
Sun and Moon Data 04.04.42
 
- 20 -
 
           
           
           
    continued      
    04.04.42      
    18.12   On the bottom.  
    19.03   Periscope depth.  For aircraft again went deep.  Cloudless.  Sunny.  Mirror flat.  At depth 17 meters on the bottom.  
    19.40   Ran to somewhat deeper water.  
        On the bottom depth 22 meters.  
        Day attacks are given up now.  In spite of dependence on the buoys, the steamer route extends more than one nm wide. The horizon is hazy, the steamers come in sight full size at only about 3 nm.  Therefore, maneuver ahead is usually unsuccessful.  Besides, strong air surveillance.  Danger of being seen is great in the shallow water, strong sunlight, smooth sea and being limited to the forward periscope.  
        All together today through the periscope sighted or heard perfectly:  16 steamers, of these 9 southbound, 7 northbound.  
        Of these I am interested mainly the southbound, all of which are between Lookout and Hatteras at the beginning of twilight.  Intend to run there.  
    23.50   At periscope depth.  Sounds of 2 steamers, northbound.  
        Now the forward periscope has steamed (inside) difficult to see.  Sounds are very loud.  Recognize dimly 2 full large tankers, led by an escort.  Hold contact as long as possible submerged.   Gyrocompass fails.  Nothing is spared us.  In the periscope nothing is seen, but is heard well.  
    24.00 CA 7935 Day's run:  Surfaced      70.57 nm,  
      Submerged                  Submerged   8.12 nm.  
                                                                     
    05.04.42      
    01..39   Still surface in brightness.  Tanker still distinguished.  Darkness falls quickly and the tanker disappears in the hazy horizon.  Follow at high speed.  Navigating by the North Star.  
        Buoys are very far separated here. Today of all days it is not as dark as [it has been] for weeks.  No visible horizon.  
    02.20   Stopped.  Attempt to listen on the surface without results.  Again followed.  
    02.30   Shadow to starboard.  Escort vessel.  So that tanker can not be far off.  
        At this moment the starboard diesel clutch becomes too hot.  Starboard diesel stopped.  Escort vessel disappears again.  
    02.50   Dived to listen.  The steamer is heard at relative bearing 315°.  This corresponds  
           
Sun and Moon Data 04.04.42
Sun and Moon Data 05.04.42
 
- 21 -
 
           
           
           
    continued      
    05.04.42   from my North Star navigation to a course which leads to land.  
    02.53   Surfaced.  In any case, hold 15° further to starboard and chased after.  
    03.21   Shadow to starboard.  Again escort vessel, however no tanker.  
        Suppose that the patrol vessel guards to seaward, break through behind him, to port.  Also nothing seen.  
        Run again behind his stern to starboard and steam off.  
    03.48   Dived to listen.  
        Tanker relative bearing 20°.  Patrol vessel positioned to port, that is to say sheered far astern or has nothing to do with the tanker convoy.  
    03.52   Surfaced.  Chase continues.  
    04.00 CA 7653    
      SSW 1-2, Sea 0, cloudless    
    04.30   Shadow to port ahead, tanker.  Despite all obstacles have achieved after all.  The second tanker is not seen.  Can not search long, because now the moon rises.  Steamed to starboard, approached and attacked.  
    04.47 CA 7652 Shot from tube III.  Shooting data set:  
      SSW 1-2, Sea 0, cloudless Target speed = 8 knots, target angle = 80°, range = 1000 meters, depth = 4 meters.  
        Hit aft 40-50 meters.  
        After one minute 0.8 seconds.  Powerful detonation.  Fire column one hundred meters high, and the tanker is engulfed in flames.  It was a large tanker of about 10000 GRT.  
        Short time later we are fired upon with star shells by the real escort who is still positioned further ahead probably with the other tanker.  
        The wind is positioned favorable and drives the smoke between us and the fire.  Tanker lists heavily.  The sky is obscured.  Nothing is seen of the patrol vessel that we overtook.  
        Turn off at high speed to about 90°, to get to deeper water.  Tanker is torpedoed in about 15-20 meters.  The burning oil occupies a sector of about 40°.  After about 2 hours the fire disappears, oil on the water continues to burn.  The tanker is sunk.  Patrol vessel shoots star shells for about 1 hour, however ineffectively.  
    05.30   Slow and turn slowly to the south.  
    08.00 CA 7693    
      SSW 1-2, Sea 0, cloudless, Vis. medium to good    
    12.00 CA 7939 Dived and put the boat on the bottom.  No new position due to the failure of the gyro compass.  Morning navigation fix also inexact due to hazy horizon.  
      SSW 1-2, Sea 1, cloudless, somewhat hazy, Vis. medium  
        Lying at depth A.  
           
           
Sun and Moon Data 05.04.42
 
- 22 -
 
           
           
           
    continued      
    05.04.42   Several steamer sounds in the east, very faint.  Obviously steamers which approach from out there.  
    16.00   At periscope depth.  Piston steamer sounds.  
    16.31   Surfaced.  Steamer on the hazy horizon difficult to distinguish.  Broad target angle 80°, course towards land.  Maneuvering ahead is hopeless.   
    16.46   Dived, put the boat on the bottom.  During the day 8 steamers heard at long ranges.  
    24.00 CA 7939 Submerged.  
        Difference between dead reckoning and actual position after a navigation fix:  210°T, 9 nm.  
        Day's run:  Surfaced           72 nm,  
                         Submerged       2.8 nm.  
                                                                     
    06.04.42      
    01.30   Surfaced.  
        Star navigation fix results in a position close to Hatteras.  Ran closer to the Cape.  
    04.30   Positioned abeam the peacetime position of the lightship.  
    06.00   Dived to listen, nothing heard except for two destroyers running south at high speed.  
        Surfaced.  
        At minimum speed continued to run on course to Lookout buoy, corresponding to the Mohr situation report, steamers do not drive in the Bay, nothing seen with cloudless sky.  Good visibility.   Neither steamers nor escort vessels.  
    08.00 CA 7994    
      SSW 3, Sea 2-3, cloudless, Vis. good    
    12.00 DC 1224    
      SW 3-4, Sea 3, cloudless, Vis. good    
    12.18   Dived at the beginning of twilight.  
        During the entire day no propeller sounds.  Traffic must be offset seaward at the latitude of Cape Hatteras.  
        Several routine depth charges at long ranges.  
    23.37   At periscope depth.  Propeller sounds, tanker with escort vessel coming from the south.  Go on parallel course and hold contact submerged.  
    24.00 DC 1224 Day's run:  Surfaced         80.14 nm,  
      Submerged                  Submerged       7.30 nm.  
                                                                     
    07.04.42      
    01.25   Surfaced at the beginning of twilight.  
    01.29   Again crash dive.  Tanker is still too high out.  
    01.43   Surfaced.  Tanker can still be seen.  Disappears rapidly in the quickly falling twilight.  Pursued at high speed.  
           
Sun and Moon Data 05.04.42
Sun and Moon Data 06.04.42
Sun and Moon Data 07.04.42
 
- 23 -
 
           
           
           
    continued      
    07.04.42      
    02.48   Tanker must be at the same latitude by plotting.  Dived to listen.  Relative bearing 324°.  
    02.52   Surfaced.  Continued pursuit.  
    03.20   Tanker comes in sight.  The escort is in starboard echelon.  Approached from starboard because the tanker drives quite close to the buoys.  
    03.57   Attack.  Shot from tube III.  
        Shooting data:  
        Target speed estimated 9 knots,  
        Target angle estimated 80°,  
        Range estimated 1500 meters,  
        Depth 4 meters, miss.  
        Tanker had turned on northerly course at Wimble Shoal.  
        Whether this turn still had an effect on he shot, is not clear.  
        Strike behind his stern and steamed to the port side.  
    04.17 CA 7969 New attack.  Tube I fire.  
      SW 3, Sea 2-3, very heavily cloudy, Vis. good Shooting data:  
      Target speed estimated 10 knots, target angle estimated 80°, range estimated 1000 meters, depth 4 meters.  
        After 1 minute 54 seconds, detonation, slight fire appearance.  Hit astern before the smoke stack.  Heavy blowing off steam and heavy diesel odor.  Torpedo hit at the forward edge of the engine room and the after bunker leaks.  Settles deeper astern.  Transmits his name "BRITISH SPLENDOR" (7138 GRT) torpedoed.  Searching for submarine.  Escort shoots star shells and throws depth charges.  Remain in the vicinity, as the fate of the tanker remains to be seen, if necessary to still give him a finishing shot.  Am forced back several times.  
        Must run off at high speed, was probably heard.  Escort shoots aggressively.  
    05.10   With a new attempt to approach it is determined that the tanker lies with the engine part under water.  The bridge can still be seen, and the forecastle is still out.  
        That's enough for me, ran off initially to the east then to the south.  
        At the latitude of the Diamond Lightship two large shadows, shifting quickly.  Run towards it at high speed  
        Destroyers.  Turn hard away, at the same moment the destroyers turn towards, quickly growing larger.  
    07.07 CA 7992 Crash dive!  Destroyers run at 180 RPM over the boat to the south  
    07.48   Surfaced.  Course for Lookout buoy.  The moon rises, cloudless night.  
        Decide to proceed deeper in the Bay between Diamond and Lookout and transfer torpedoes from the over deck.  
    08.00   Begin assembly of the over deck equipment.   
    09.30 [note translation is rough can't make out all the text here] Paused about half way through, due to shadows under land, patrol vessel silhouette.  
           
Sun and Moon Data 07.04.42
 
- 24 -
 
           
           
           
    continued      
    07.04.42      
        Again turned out of the bay.  
        Some time later a patrol vessel to sea.  I am positioned between both. Work goes on.  
    10.08   Large shadow under land.  
        Let a makeshift harness be thrown together.  
        Attempt attack.  
        Very unfavorable situation.  Steamer and 1 escort positioned against the dark horizon under land.  
        I am positioned exactly in the moon from both, from the second escort, however, in the rear bearing with the steamer.  
        Steamer is a gigantic freighter with a forest of masts and kingposts, loaded, estimated 14000 GRT, type NESTOR ULYSES.  
        Ran on.  Steamer must see me, however it considers itself in safety because the escort stands in the same bearing.  
    10.52 CA 7991 Tube II and IV fire.    Double shot.  
        Shooting data:  
        Target speed estimated 10 knots,  
        Target angle       "          80°,  
        Range                "          2000,  
        Depth                "           4 meters.  
        Aim point forward 60, aft 50 meters, tube IV was a tube runner.  
        After 2 minutes 06 seconds a tremendous detonation, Water vapor and smoke cloud several hundred meters high.  
        Hit about forward 30 meters.  Engine room is hit.  After about 3-4 minutes internal explosion on the steamer.  
        Escort comes closer, runs off at high speed.  Sinking not observed.  Twilight starts a short time later.  
    11.56 CA 7986 Dived, put the boat on the bottom.  
        During the day, 4 steamers with escorts, heard coming from the south.  
    24.00   Off the bottom.  
        Day's run:  Surfaced         62.86 nm,  
                         Submerged       6.18 nm.  
                                                                     
    8.04.42      
    00.03   At periscope depth.  
    01.58   Surfaced.  
        2 destroyers astern, course south, at the limit of visibility, shifting quickly off.  Running to the west under land.  Cloudless night.  
    03.26   Shadows in sight.  Escort vessel or small coastal steamer.  Let go.  
    04.00 - 08.00 CA 7976 Transfer of both torpedoes from the over deck.   
      SE 2-3, Sea 2, cloudless, Vis. good An incident. While lowering the stern torpedo the winch block tears from its foundation.  Torpedo half in the hatch.   Must be extracted with a heaving line.  Duration of the holdup approximately 10 minutes.  A critical moment.  Again ran back to the steamer route.  
    11.41 DC 1227 Crash dive in the fading darkness for a sharp shadow.  Am positioned on the bright morning horizon  
           
           
Sun and Moon Data 07.04.42
Sun and Moon Data 08.04.42
 
- 25 -
 
           
           
           
    continued      
    08.04.42      
        Vessel seen very late against the dark horizon is distinguished as a tanker.  Because only the stern torpedo is ready remained submerged.  Put the boat on the bottom.  In the course of the day 2 steamers, 1 patrol vessel sounds, course for the peacetime position of the Diamond Lightship.  
    24.00   On the bottom  
        Day's run:  Surfaced         30.01 nm,  
                         Submerged       4.98 nm.  
                                                                     
    09.04.42      
    02.05   Surfaced, ventilated the boat.  
    03.14 DC 1216 Boat put on the bottom to listen.  
    04.18   At periscope depth.  Propeller sounds from a northbound steamer, runs past to the west of me.  
    04.29   Surfaced, with lead pursued in the direction of the sound bearing.  
    05.09   Dived to listen.  
    05.12   Surfaced.  Continued to run in the direction of the sound bearing.  Very dark night, horizon not distinguished.  Heavy marine phosphorescence.  
    05.50   Dived to listen.  Propeller sounds very loud.  
    05.55   Surfaced.  Continued to run in the direction of the sound bearing.  
    06.43   Dived to listen.  Bearing again very loud.  Steamer must be near.  
    06.50   Surfaced, again pursued.  
    07.38   At Lookout buoy again dived to listen.  Steamer unchanged heard loudly.  Pursuit broken off, it is too dark out.  
        New propeller sounds, quickly growing louder were coming from the south.  Because it is abeam,  
    08.22   surfaced.  Shadow abeam.  
        Large tanker, fully loaded, about 8000 GRT.  Maneuvered ahead carefully, marine phosphorescence is incredibly strong.  Attack with the rising moon.  
    09.38 DC 1163 Shot from tube V.  
      SbyW 1, Sea 0-1, partial overcast, hazy Shooting data:  
      Target speed estimated = 10.5 knots  
        Target angle         "       = 80°  
        Range                  "       = 2000 meters  
        Depth 4.5 meters  
        After 2 minutes 2 seconds hit at the forward edge of the bridge.  High smoke and water column.  Tanker does not burn.  Radio Message apparently failed, attempt by searchlight to communicate with land.  Run for a coup de grâce.  
        Tanker turns with, still underway.  
        Peculiar unpleasant smell of run out oil.  Runs on several times.  Tanker turns.  
    10.00   Tanker has stopped.  
        Shot from tube I.  
           
           
           
Sun and Moon Data 08.04.42
Sun and Moon Data 09.04.42
 
- 26 -
 
           
           
           
    continued      
    09.04.42      
        Shooting angle 0°, depth 5 meters, Ato, torpedo speed = 40 knots.  After 38 seconds hit amidships.  Gigantic fire column.  Tanker burns.  Ran off before the quickly reaching fire.  Lifeboats were caught in the fire.  
    12.00 DC 1166 Put the boat on the bottom in the breaking dawn in the vicinity of the Lookout buoy.  Tanker still burns.  
        During the day 3 steamers on northerly course and several patrol vessels heard.  Checking of the torpedo transferred from the over deck astern shows that the engine section is full of water.  The stern canister had leaked, no obvious damage.  
    24.00   On the bottom.  
        Day's run:  Surfaced  76.56 nm, Submerged  8.03 nm  
                                                                     
    10.04.42      
    01.25   Periscope depth.  Steamer propeller sounds.  About 6000 GRT freighter coming from the south, zig zagging close ahead of me.  Was held submerged by a patrol vessel moving back and forth at a distance of 600-1000 meters.  Must wait until full darkness.  
    02.35   Surfaced.  Steamer can no longer be seen.  Very dark.  Believe pursuit is hopeless.  Boat ventilated.  Tanker from yesterday is still burning at the bow and stern.  The middle part settled.  Set off a bit to the north, out of the zone of the stationary patrol at Lookout.  
    03.35 DC 1245 Put the boat on the bottom to listen.  
      SSE 4, Sea 3, totally overcast, Vis. good    
    04.40   Propeller sounds, coming from the south.  On getting closer a steamer and patrol vessel sounds distinguished.  
    05.17   Sounds at the same latitude and very loud.  Surfaced.  Pursued at high speed with small lead angle on the last sound bearing.  
    05.40   Shadow in sight.  Steam close to his starboard side.  Large tanker, about 10000 GRT.  Very dark night, heavy marine phosphorescence.  As the tanker in target angle 30° for abeam distance of 1000 meters overtaken and slowly turned on E-motors.  To avoid sources of error with the questionable torpedo, fixed firing angle 180° set.  
    06.27 DC 1246 Shot from tube V.  Shooting date:  Target speed estimates = 10.5 knots, target angle estimated 80°, range estimated 1000 meters, depth 4.5 meters, Ato, speed 40 knots.  
        After 49 seconds gigantic detonation.  Tanker breaks in the center at the same moment.  Keel broken.  Bridge goes with the stern part.  Begins to burn.  Ran off.  Patrol vessel shoots star shells, however badly.  Began return transit course 70°.  Second patrol vessel shoots star shells for about 2 hours in our wake.  
           
           
Sun and Moon Data 09.04.42
Sun and Moon Data 10.04.42
 
- 27 -
 
           
           
           
    continued      
    10.04.42      
    08.00 DC 1253    
      SSE 3, Sea 2, totally overcast, Vis. good    
    08.10   Quick in succession blazing burst of flames on the tanker can still be seen, as if gas tanks flew in the air.  After the second blazing burst of flame it suddenly disappeared.  Believe that the tanker sunk.  
    10.18 DC 1239 Crash dive for destroyer approaching at high speed from astern.  Overruns the boat.  Destroyer sounds disappear with steamer sounds on the same bearing, had apparently taken over escort.  Another steamer's sounds come very close.   
    11.31   Surfaced.  
        About 3000 meters from me an 8000 GRT steamer, course for Hatteras.  Must let him go, already to bright for artillery attack.  Transit continued.  This traffic confirms my belief that from Hatteras a large part of the traffic turns off to the SE to SSE.  
    12.00 DC 1314    
      SW 3, Sea 2, totally overcast, Vis. good    
    12.31   Dived due to the danger from air with unfavorable visibility.  Several depth charges at long range.  
    16.00 DC 1313 Surfaced.  Weather is favorable.  Continued transit on the surface.  
      SWbyW 7-8, Sea 7, nearly completely overcast, Vis. good  
    20.00 CA 8789    
      SWbyW 7-8, Sea 7, nearly completely overcast, Vis. good    
    24.00 CA 8873 Day's run:  Surfaced  165 nm, Submerged  15.43 nm  
      SWbyW 4-5, Sea 4, completely overcast, Vis. good    
                                                                     
    11.04.42   From Topp:  
    01.40   Situation:  Cape Henry, Hatteras, Lookout heavy traffic, large part turns off at Hatteras to the SE to SSE, destroyer patrols.  More important coastal traffic protected by patrol vessels.  Favorable position Wimble Shoal and Raleigh Bay, 40-meter line.  Air at night not determined, patrol vessels without Asdic.  WSW 5, 1005 mb rising, +27°C.  
        Further Successes:  
        5 April square CA 7652 protected tanker, full 10000 GRT burning sinking, 7 April square CA 7969 "BRITISH SPLENDOUR", protected, full, left sinking.  Square CA 7991 protected gigantic freighter, about 14000 GRT, torpedoed, shortly later internal explosion.  Sinking not observed, a tube runner.  9 April square DC 1163 tanker 8000 GRT, full, burning sinking.  10 April square DC 1246, protected tanker 10000 GRT full, burning sunk.  With this 43832 GRT sunk or destroyed.  14000 GRT torpedoed.  Out of torpedoes, 60 cbm.  Return transit square DC 1315.  All naval squares.  Am missing Serial Nos. 245, 209, 10, 25, 36, 48, 49, 51, 59, 61, 63, 71.  
           
           
           
Sun and Moon Data 10.04.42
Sun and Moon Data 11.04.42
 
- 28 -
 
           
           
           
    continued      
    11.04.42      
    04.00 CA 8865    
      W 4-5, Sea 5, totally overcast, Vis. medium    
    08.00 CA 8919    
      N 3-4, Sea 3, totally overcast, Vis. moderate    
    12.00 CA 8932    
      NW 4, Sea 3-4, heavily cloudy, Vis. good    
    15.16 CA 9711 Tanker on northerly course sighted.  Held contact.  
    15.34   Horizon was hazy, tanker passes out of sight.  Pursued at high speed on the last bearing.  Nothing more seen.  Tanker seemed to run at high speed.  
    16.00 CA 9476    
      NWbyW 3-4, Sea 3, totally overcast, Vis. very good    
    18.37   To Kaptlt. Topp:  
        In grateful appreciation of your heroic struggle in the battle for the future of our people I award you as 87th of soldier of the German Armed Forces the Oak Leaves to the Knight's Cross of the Iron Cross.  
                                                              Adolf Hitler.  
    19.10   After 3-hour pursuit broken off as hopeless.  Artillery operation would not have been possible due to weather.  
    20.00 CA 9288    
      NWbyW 4-5, Sea 4-5, totally overcast, Vis. good    
    20.54   For the award of the Oak Leaves I send to you my heartiest congratulations in grateful acknowledgment of the outstanding achievements which you and your crew have accomplished, Topp.  
                                                              Oberbefehlshaber  
    24.00 CA 9371 Day's run:  Surfaced  240 nm.  
      WNW 6, Sea 4-5, totally overcast, Vis. medium to good    
                                                                     
    12.04.42      
    01.49   For your struggle and well-deserved decoration my warmest congratulations to you and your men.  
                                                              Befehlshaber.  
    02.00   In a muster I expressed my thanks and appreciation for the crew.  
    04.00 CA 9358    
      WbyN 6-7, Sea 5-6, partial overcast, Vis, medium to good    
    08.00 CB 7141    
      WNW 5-6, Sea 6, totally overcast, Vis. bad to medium    
    12.00 CB 7125    
      WNW 6, Sea 5, totally overcast, rain showers, Vis. moderate    
           
           
Sun and Moon Data 11.04.42
Sun and Moon Data 12.04.42
 
- 29 -
 
           
           
           
    continued      
    12.04.42      
    16.00 CB 4799    
      WNW 7-8, Sea 6-7, totally overcast, rain showers, Vis. medium to good    
    20.00 CB 4885    
      WNW 7, Sea 6, nearly completely overcast, Vis. very good    
    24.00 CB 4945 Day's run:  Surfaced  201 nm.  
      NWbyW 6-7, Sea 6, completely overcast, Vis. medium    
                                                                     
    13.04.42      
    04.00 CB 4937    
      NW 6-7, Sea 6, totally overcast, Vis. medium    
    08.00 CB 5716    
      NW 6-7, Sea 5, totally overcast, Vis. good    
    12.00 CB 5497    
      NW 2-3, Sea 3, nearly completely overcast, Vis. good    
    16.00 CE 5573    
      NW 5, Sea 4, completely overcast, rain showers, Vis. medium to good    
    20.00 CB 5596    
      NWbyN 4, Sea 3, totally overcast, rain showers, Vis. bad    
    22.34   Schuch, Flachsenberg, U-402 and Topp tomorrow between 01.00 hours and 05.00 hours report weather.  
    24.00 CB 5658 Difference between dead reckoning and actual position after a navigation fix:  164°T, 17 nm.  
      NNW 6, Sea 5-6, nearly completely overcast, Vis. good  
      Day's run:  Surfaced  194 nm.  
                                                                     
    14.04.42      
    04.00 CB 6441    
      N 5, Sea 5-6, heavily cloudy, Vis. medium    
    08.00 CB 6426    
      N 5, Sea 4-5, partial overcast, Vis. good    
    12.00 CB 6278    
      NNW 5, Sea 4-5, partial overcast, Vis. very good    
    14.56   Return harbors are:  . . . . . St. Nazaire for Topp.  
    16.00 CB 6291    
      NWbyN 5, Sea 5, nearly completely overcast, hail showers, Vis good    
    20.00 CB 6349    
      NbyW 7, Sea 6, nearly completely overcast, Vis. good    
    24.00 CB 6369 Difference between dead reckoning and actual position after a navigation fix:  234°T, 8 nm.  
      NNW 5, Sea 4-5,  
           
           
Sun and Moon Data 12.04.42
Sun and Moon Data 13.04.42
Sun and Moon Data 14.04.42
 
- 30 -
 
           
           
           
    continued      
    14.04.42      
      partial overcast, Vis. very good Day's run:  Surfaced  199 nm.  
                                                                     
    15.04.42      
    04.00 CC 4156    
      NbyW 3-4, Sea 4, partial overcast, Vis. good    
    07.00   Stern over deck canister opened, to get perfect weight and trim conditions.  Canister leaks.  
    07.46   Test dive.  
    08.00 CC 4218    
      NNW 5, Sea 4, few clouds, Vis. very good    
    12.00 CC 4225 At times gyro compass out of service.  
      NbyE 4, Sea 3-4, partial overcast, Vis. very good    
    16.00 CC 1978 Return transit.  
      NE 3, Sea 2-3, nearly cloudless, Vis. very good    
    20.00 CC 1991    
      NE 1-2, Sea 0-1, nearly cloudless, slight swell, Vis. very good    
    24.00 CC 2746 Difference between dead reckoning and actual position after a navigation fix:  204°T 4 nm, 66°T 16 nm.  
      NbyE 1, Sea 0, few clouds, Vis. very good  
      Day's run:  Surfaced  214 nm, Submerged  0.6 nm  
                                                                     
    16.04.42      
    04.00 CC 2815    
      NbyE 1, Sea 0, nearly cloudless, swell, Vis. good    
    08.00 CC 2597 Smoke cloud was sighted astern at the beginning of twilight, shifting to the south.  Due to fuel inventory pursuit is no longer possible.  
      NE 1-2, Sea 1, nearly cloudless, Vis. good  
    12.00 CC 2681    
      Sea 4, totally overcast, Vis. good    
    16.00 CC 2666    
      ESE 2, Sea 2, totally overcast, Vis. bad    
    20.00 CC 3429    
      SE 5, Sea 4, heavily cloudy, Vis. very good    
    24.00 CC 3513 Day's run:  Surfaced  219 nm.  
      SEbyS 3, Sea 2-3, totally overcast, Vis. very good    
                                                                     
           
           
           
Sun and Moon Data 14.04.42
Sun and Moon Data 15.04.42
Sun and Moon Data 16.04.42
 
- 31 -
 
           
           
           
           
    17.04.42      
    04.00 CC 3371 Return transit.  
      SEbyE 4, Sea 3-4, totally overcast, Vis. good    
    08.00 CC 3364    
      SEbyS 3-4, Sea 3, nearly cloudless, Vis. good    
    12.00 CD 1127    
      SEbyE 5, Sea 4-5, few clouds, Vis. very good    
    16.00 BC 8895    
      SE 6, Sea 5, nearly completely overcast, Vis. good    
    20.00 BC 8949    
      SEbyS 5, Sea 4-5, partial overcast, Vis. good    
    24.00 BC 8961 Difference between dead reckoning and actual position after a navigation fix:  34°T, 15 nm.  
      SE 6, Sea 5, totally overcast, Vis. good, slight swell  
      Day's run:  Surfaced  228 nm.  
                                                                     
    18.04.42      
    04.00 BC 9715    
      SEbyE 7, Sea 6, totally overcast, Vis. medium    
    08.00 BC 9723    
      SEbyS 6-7, Sea 5-6, partial overcast, Vis. medium to good    
    12.00 BC 9574    
      SE 5-6, Sea 4-5, nearly cloudless, Vis. very good    
    16.00 BC 9562    
      SEbyE 6, Sea 6, partial overcast, Vis. good    
    18.40   Hoffmann, Linder, Topp and Hardegen report weather tomorrow between 01.00 hours and 05.00 hours.  
    24.00 BC 9634 Difference between dead reckoning and actual position after a navigation fix:  52°T, 30 nm.  
      SEbyS 7, Sea 6, partial overcast, swell, Vis. very good  
      Day's run:  Surfaced  200 nm.  
                                                                     
    19.04.42      
    02.15   Short Signal weather report sent:  
        45°N, 39°W, 1026 mb, steady, +12°C, SE 7, Cumulonimbus, 6-9/10, Vis. up to 10 nm, medium-high SE-swell.  
    04.00 BD 7412    
      ESE 7, Sea 6, totally overcast, rain, Vis. medium to good    
    08.00 BD 7423    
      SEbyE 7, Sea 6-7, totally overcast, rain, Vis. medium    
    12.00 BD 7199    
      SE 6, Sea 5, totally overcast, Vis. very good    
           
Sun and Moon Data 17.04.42
Sun and Moon Data 18.04.42
Sun and Moon Data 19.04.42
 
- 32 -
 
           
           
           
    continued      
    19.04.42      
    16.00 BD 7285    
      SEbyS 6, Sea 5, totally overcast, Vis. good    
    20.00 BD 7295    
      SSE 6, Sea 5-6, nearly completely overcast, Vis. good    
    24.00 BD 7349 Day's run:  Surfaced  170 nm.  
      SSE 7, Sea 6-7, totally overcast, Vis. very good    
                                                                     
    20.04.42      
    04.00 BD 7367    
      SE 5-6, Sea 5, totally overcast    
    08.00 BD 8145    
      SSE 5-6, Sea 5, totally overcast, slight swell, Vis. good    
    12.00 BD 8156    
      S 7, Sea 6, totally overcast, Vis. bad    
    16.00 BD 8242    
      Sea 4, heavily cloudy, Vis. good    
    20.00 BD 8237    
      WSW 5, Sea 4, partial overcast, Vis. good    
    24.00 BD 5994 Difference between dead reckoning and actual position after a navigation fix:  47°T, 25.6 nm.  
      WbyS 2-3, Sea 2, heavily cloudy, long SW-swell, Vis. moderate to good  
      Day's run:  Surfaced  234 nm.  
                                                                     
    21.04.42      
    04.00 BD 6781    
      SW 2-3, Sea 3, partial overcast, Vis. moderate to good    
    08.00 BD 6847 Clocks advanced to D.S.Z.  
      WbyS 3, Sea 2, heavily cloudy, Vis. good    
    12.00 BD 6864    
      SW 4, Sea 3, nearly completely overcast, Vis. very good    
    16.00 BD 6952    
      SWbyS 1-2, Sea 1-2, nearly completely overcast, Vis. very good    
    20.00 BD 6937    
      Wind calm, nearly cloudless, hazy, Vis. moderate    
    24.00 BE 4751 Difference between dead reckoning and actual position after a navigation fix:  260°T 23.2 nm, 211°T, 9 nm.  
      E 1-2, Sea 0, nearly cloudless, hazy, Vis. moderate  
      Day's run:  Surfaced  188 nm.  
                                                                     
           
           
           
Sun and Moon Data 19.04.42
Sun and Moon Data 20.04.42
Sun and Moon Data 21.04.42
 
- 33 -
 
           
           
           
           
    22.04.42      
    04.00 BE 4841    
      NNE 4, Sea 3, totally overcast, Vis. good    
    08.00 BE 4837    
      NE 3, Sea 2-3, totally overcast, rain    
    09.20   Test dive.  
    09.45   Surfaced.  
    12.00 BE 4919    
      ENE 6, Sea 5-6, totally overcast, light swell, Vis. bad to medium    
    16.00 BE 4936    
      NE 8-9, Sea 7-8, totally overcast, swell, Vis. moderate    
    20.00 BE 5724    
      NE 8-9, Sea 7-8, totally overcast    
    21.44   1.)  Topp . . . . . . . . tomorrow between 01.00 hours and 05.00 hours report weather.  
        2.)  On 23 April 08.00 hours Topp switch to Ireland Circuit.  
    24.00 BE 5734 Day's run:  Surfaced  208.38 nm, Submerged 1.19 nm.  
      NEbyE 8, Sea 7, totally overcast, rain, Vis. moderate    
                                                                     
    23.04.42      
    01.24   Short Signal weather report sent:  
        46°N, 19°W, steady, 1004 mb, +13°C, NE 5-6, 6-9/10, Cumulonimbus, Vis. up to 5 nm, medium-high NE swell.  
    04.00 BE 5812    
      ENE 5-6, Sea 5, heavily cloudy, Vis. medium    
    08.00 BE 5882    
      ENE 6-7, Sea 5-6, totally overcast, Vis. medium    
    12.00 BE 5833    
      NEbyE 6, Sea 5-6, totally overcast, high swell, Vis. good    
    16.00 BE 5913    
      N 5-6, Sea 5, totally overcast, long swell, Vis. good    
    20.00 BE 5923    
      NE 4-5, Sea 4-5, partial overcast, medium-long swell, Vis. good    
    24.00 BE 6711 Difference between dead reckoning and actual position after a navigation fix:  241°T, 7.4 nm.  
      NEbyN 4-5, Sea 4-5, heavily cloudy, Vis. good  
      Day's run:  Surfaced  148 nm.  
                                                                     
           
           
Sun and Moon Data 22.04.42
Sun and Moon Data 23.04.42
 
- 34 -
 
           
           
           
           
    24.04.42      
    04.00 BE 6731    
      NEbyE 3, Sea 2-3, nearly cloudless, medium-high swell, Vis. good    
    08.00 BE 6821    
      NEbyE 4, Sea 3, heavily cloudy, slight swell, Vis. good    
    12.00 BE 6832    
      NE 4-5, Sea 4, totally overcast, NE-swell, Vis. good    
    16.00 BE 6922    
      NEbyE 4-5, Sea 4, totally overcast, Vis. medium to bad    
    20.00 BF 4712    
      ENE 4-5, Sea 3-4, totally overcast, low NE-swell, Vis. medium    
    24.00 BF 4732 Delayed sending return report, because increasing seas from ahead.  
      E 5-6, Sea 4-5, totally overcast, rain, Vis. moderate  
      Difference between dead reckoning and actual position after a navigation fix:  273°T, 7.4 nm.  
         
        Day's run:  Surfaced  232 nm.  
                                                                     
    25.04.42      
    04.00 BF 4821    
      NbyE 4, Sea 3-4, totally overcast, slight swell, Vis. medium    
    08.00 BF 4911    
      E 2-3, Sea 2, totally overcast, slight NE-swell, Vis. medium to good    
    08.51   Short Signal:  Position 36 hours off return harbor.  
                                                                 U-552.  
    09.15   Topp be off return harbor at 1500 on 26 April.  
    11.54   7th U.-Flottille to U-552:  
        1.)  Set off to sea.  
        2.)  Escort positioned on 27 April 08.00 hours N 1.  
    12.00 BF 4932    
      ESE 3, Sea 2, low NE-swell, Vis. bad    
    12.16   Dived.  
    21.14   Surfaced.  
    21.42   Entry route for Topp is "Uhunest".  
    24.00 BF 5716 Difference between dead reckoning and actual position after a navigation fix:  267°T, 14 nm.  
      ESE 1, Sea 0-1, heavily cloudy, somewhat hazy, Vis. medium  
      Day's run:  Surfaced  145 nm,  Submerged 13.1 nm.  
                                                                     
    26.04.42      
    02.19   U-552 returns St. Nazaire 27 April in the morning via "Uhunest".  
        U-213, U-126, U-128 etc. . . . .  
           
           
           
Sun and Moon Data 24.04.42
Sun and Moon Data 25.04.42
Sun and Moon Data 26.04.42
 
- 35 -
 
           
           
           
    continued      
    26.04.42      
    04.00 BF 5738    
      S 2, Sea 1, totally overcast, slight swell, Vis. medium    
    08.00 BF 5852    
      SE 2, Sea 1-2, totally overcast, Vis. good    
    08.01   Dived.  
    21.00 BF 5861    
      EbyN 2, Sea 1-2, totally overcast, Vis. good    
    22.57   To Topp:  
        U-653 departs Lorient 26 April 20.00 hours via Uhunest.  
    23.31   Topp from B.d.U.:  
        5.T.-Flottille executes check cruise night of 27 April for "Burggraff" departure, returning along "Uhunest" from the 200-meter line via point "Uhu" to Point 34 T.  
    24.00 BF 6752 Day's run:  Surfaced  126 nm,  Submerged 13 nm.  
      EbyN 2-3, Sea 2, partial overcast, Vis. good    
                                                                     
    27.04.42      
    03.00 BF 6731 Passed U-boat with German silhouette, no recognition signals exchanged.  Probably "U-653".  
      EbyS 2, Sea 1, partial overcast, Vis. medium to good  
    04.00 BF 6495    
      EbyS 4, Sea 3, totally overcast, Vis. medium to good    
    07.30   Taken under escort by Sperrbrecher at N 1.  
           
                                                                     
           
           
           
           
           
           
           
Sun and Moon Data 26.04.42
Sun and Moon Data 27.04.42

Appendices to U-552's KTB - click on the text at left to proceed to the documents
Chart Track chart covering entire war patrol               7 March - 27 April 1942

 
 
     
 

Comments of the Befehlshabers der Unterseeboote

 
                              on the Kriegstagebuch of "U-552" from 28.1.42 - 27.4.42.  
     
          Brilliant patrol.  With guts and deliberation the Kommandant operated almost exclusively in shallow water and used the numerous success possibilities very well.  
     
    For the Befehlshaber der Unterseeboote  
    - The Chief of the Operations Department -  
                         
     
     
 


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