U-160 - 4th War Patrol

Translation by Jerry Mason with the help of Ken Dunn

Departed
Date
Arrived
Date
Days at Sea
Lorient
6 January 1943
Bordeaux
10 May 1943
125

 

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 Hit
Date
KTB Time
Position
Ship
Tons
Nationality
Convoy
8 Feb 43
00.13 - 02.33
33°03'S, 7°51'W
ROGER B. TANEY
7,191
American
 
3 Mar 43
21.22
31°45'S, 31°24'E
NIRPURA
5,961
British
DN-21
3 Mar 43
21.22
31°45'S, 31°24'E
HARVEY W. SCOTT
7,176
American
DN-21
3 Mar 43
21.23
31°45'S, 31°24'E
TIBIA (damaged)
10,356
Netherlands
DN-21
3 Mar 43
23.10 - 23.11
31°57'S, 30°32'E
EMPIRE MAHSEER
5,087
British
DN-21
4 Mar 43
01.46
31°57'S, 30°56'E
SHEAF CROWN (damaged)
4,868
British
DN-21
4 Mar 43
01.47
31°57'S, 30°56'E
MARIETTA E.
7,628
British
DN-21
8 Mar 43
20.20 - 20.32
29°03'S, 33°52'E
JAMES B. STEPHENS
7,176
American
11 Mar 43
20.17 - 20.32
29°09'S, 34°00'E
AELYBRYN
4,986
British
     
 Total = 60,429
   
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.


 
- 1 -
 
           
           
           
           
           
           
           
                                         K  r  i  e  g  s  t  a  g  e  b  u  c  h  
                                         = = = = = = = = = = = = = = = =  
           
                                                         "U-160"  
           
           
                                         Beginning              on 10.12.1942  
                                         Ending                  on 10.  5.1943.  
            4th War Patrol  
           
           
      10.12.42  Lorient to    
        Shipyard period.  
      02.01.43  Lorient    
      09.00 to    
      12.00 Sea trial and trim test.  
           
      03.01.43  Lorient to    
        Manning the boat and outfitting.  
      04.01.43  Lorient    
           
      05.01.43  Lorient    
      09.10 to    
      11.30 Final trim test.  
      14.30 to    
      17.30 Degaussing and compensating the magnetic compass.  
           
           
           
           
           
           
           
           
           
        © U-boat Archive 2014  - all rights reserved  
Click the flag to view the above page from the original German KTB
 
- 2 -
 
           
           
           
           
    06.01.43 Lorient    
    16.30   Put to sea on 4th war patrol.  
    19.00 Point Laterne Released by escort, FmM.B. brought out.  
      SWbyW 5-6, Sea 3-4, Vis. 6-8 nm    
    19.45 BF 6175 Detection on 168 cm, horizontally polarized, dived, no attack.  
    20.00 BF 6175    
    20.28   Surfaced.  
    20.43 BF 6177 Detection as above, dived, no attack.  
    21.24   Surfaced.  
           
    07.01.43 Bay of Biscay    
    00.00 BF 5532    
    04.00 BF 5551    
    08.00 BF 5493    
      WbyS 6, Sea 4-5, Vis. 4-6 nm    
    08.26   Dived, proceeding submerged.  
    12.00 BF 5494 Day's run 130 nm.  
      φ = 46° 39' N    
      λ =   5° 49' W    
    16.00 BF 5489    
    18.45   Surfaced.  
    20.00 BF 5713    
           
    08.01.43 Bay of Biscay    
    00.00 BF 4916    
    04.00 BF 4972    
    08.00 BF 7311    
      W 4-5, Sea 3-4, Vis. 2 nm, light rain    
    09.00   Dived, proceeding submerged.  
    12.00 BF 7237 Day's run 166 nm.  
      φ = 45° 22' N    
      λ =   9° 21' W    
    13.30   Surfaced to ventilate.  
    13.41   Dived.  
    16.00 BF 7228    
           
Sun and Moon Data 06.01.43
Sun and Moon Data 07.01.43
Sun and Moon Data 08.01.43
 
- 3 -
 
           
           
           
    continued      
    08.01.43 Bay of Biscay    
    18.35   Surfaced.  
    20.00 BF 7245 No traffic, nothing of note.  
           
    09.01.43 North Atlantic northwest of Spain    
    00.00 BF 7185 In accordance with outbound orders heading for square DH 15.
    04.00 BE 9635    
    08.00 BE 9654 Heavy cross sea, upper deck damage.  
      SWbyW 7, Sea 5, Vis. 2-4 nm    
    09.03   Dived.  
    12.00 BE 9647 Day's run 165 nm.  
      φ = 44° 06' N    
      λ = 12° 44' W    
    14.04   Surfaced.  
    14.10   Dived, as there is no weather improvement.  
    16.00 BE 9593    
    17.01   Surfaced.  
    17.04   Dived, still heavy seas.  
    19.02   Surfaced.  
    20.00 BE 9594 No traffic.  
           
    10.01.43 North Atlantic west of Spain    
    00.00 BE 9819    
    04.00 BE 9768    
    08.00 BE 9784    
      SWbyS 6, Sea 5, Vis. 4 nm, heavy cross sea    
    09.30   Dived.  
    12.00 CF 3316 Day's run 158 nm  
      φ = 42° 45' N    
      λ = 15° 52.5' W    
    16.00 CF 3317 Surfaced.  
           
Sun and Moon Data 08.01.43
Sun and Moon Data 09.01.43
Sun and Moon Data 10.01.43
 
- 4 -
 
           
           
           
    continued      
    10.01.43 North Atlantic west of Spain    
    20.00 CF 3269 The seas do not become any longer, because the wind shifts strongly and each swell is overlaid with a differing wind-sea.  
      WbyS 7-8, Sea 6, Vis. 4-8 nm  
           
    11.01.43 North Atlantic west of Spain    
    00.00 CF 3297    
    03.28   Outgoing Short Signal:  Weather report in accordance with orders.  
    04.00 CF 3528    
    08.00 CF 3543    
    12.00 CF 3544 Day's run 105 nm.  
      φ = 41° 35' N    
      λ = 17° 28' W    
      SWbyS 8-9, Sea 8, Vis. 2000 meters    
    12.24   Crash dive for training, remained submerged due to the sea state.  
    16.00 CF 3468    
    18.00   Surfaced.  
    20.00 CF 3495 Starboard-astern upper deck canister comes loose.  In spite of coming to a westerly course there is never a long swell.  Heavy cross sea causes further upper deck damage.  
    22.00 W 10-11, Sea 9, Vis. 3 nm  
           
    12.01.43 North Atlantic east of the Azores    
    00.00 CF 3737    
    04.00 CF 3759    
    06.41   Outgoing Short Signal:  Weather report in accordance with orders.  
    08.00 CF 3787 On getting light determined that the starboard astern canister is ripped overboard.  
    12.00 CF 6141 Day's run 117.5 nm.  
      φ = 39° 52' N    
      λ = 18° 34' W    
      W 6, Sea 5, Vis. 5 nm    
           
           
Sun and Moon Data 10.01.43
Sun and Moon Data 11.01.43
Sun and Moon Data 12.01.43
 
- 5 -
 
           
           
           
    continued      
    12.01.43 North Atlantic east of the Azores    
    16.00 CF 5392    
    18.55   Incoming Radio Message 1501/12/82:  In accordance with orders set course for GG 10.  Orders for Group "Seehund" will be transferred by "Wilamowitz".  
    20.00 CF 5622    
    21.17   Outgoing Short Signal:  Passing report sent.   
        No traffic.  
           
    13.01.43 North Atlantic east of the Azores    
    00.00 CF 5645    
    04.00 CF 5595    
    06.24   Outgoing Short Signal:  Weather report in accordance with orders.  
    08.00 CF 5826    
    09.30   Crash dive for training.  
    12.00 CF 5851 Day's run 145 nm.  
      φ = 38° 02' N    
      λ = 20° 38' W    
    12.51   Surfaced.  
    16.00 CF 5848    
      SW 6-7, Sea 6, Vis. 5-6 nm    
    20.00 CF 8215 No traffic, nothing of note.  
           
    14.01.43 North Atlantic southeast of the Azores    
    00.00 CF 8248    
    04.00 CF 8436    
    08.00 CF 8467 Correction of upper deck damage, retighten the canisters, adjusting vents 4 and 5.  
      SW 2, Sea 2, Vis. 5 nm  
    10.27 - 10.58   Test dive.  
    12.00 CF 8485 Day's run 148 nm.  
      φ = 35° 47' N    
      λ = 21° 39' W    
    16.00 CF 8743    
    20.00 CF 8772 No traffic, nothing of note.  
           
Sun and Moon Data 12.01.43
Sun and Moon Data 13.01.43
Sun and Moon Data 14.01.43
 
- 6 -
 
           
           
           
           
    15.01.43 North Atlantic west of Madeira    
    00.00 DH 1133    
    03.02   Crash dive for training.  
    03.28   Surfaced.  
    04.00 DH 1164    
    08.00 DH 1188    
    12.00 DH 1443 Day's run 154.5 nm.  
      φ = 33° 30' N    
      λ = 23° 09' W    
      SW 4-5, Sea 3, Vis. 6 nm    
    16.00 DH 1478    
    20.00 DH 1741 No traffic, nothing of note.  
           
    16.01.43 North Atlantic west of the Canary Islands    
    00.00 DG 3999    
    04.00 DG 6362    
    08.00 DG 6389    
    12.00 DG 6651 Day's run 171 nm  
      φ = 30° 49.5' N    
      λ = 24° 15' W    
      NW 3-4, Sea 3, Vis. 6-8 nm    
    16.00 DG 6678    
    20.00 DG 6944 No traffic, nothing of note.  
           
    17.01.43 North Atlantic west of the Canary Islands    
    00.00 DG 6898    
    04.00 DG 9255    
    08.00 DG 9287    
    09.07 - 10.30   Test dive.  
    12.00 DG 9545 Day's run 168 nm.  
      φ = 28° 00' N    
      λ = 25° 44.5' W    
      NE 0-1, Sea 0, Vis. 12 nm    
    16.00 DG 9733    
    20.00 DG 9768 No traffic, nothing of note.  
           
Sun and Moon Data 15.01.43
Sun and Moon Data 16.01.43
Sun and Moon Data 17.01.43
 
- 7 -
 
           
           
           
           
    18.01.43 North Atlantic north of Cape Verde    
    00.00 DT 1233    
    04.00 DT 1292    
    08.00 DT 1537    
    12.00 DG 1585 Day's run 187 nm.  
      φ = 25° 01' N    
      λ = 26° 35' W    
      SSE 0-1, Sea 0, Vis. 8-10 nm    
    16.00 DT 1851    
    20.00 DT 4213 No traffic, nothing of note.  
           
    19.01.43 North Atlantic north of Cape Verde    
    00.00 DT 4248    
    04.00 DT 4514    
    08.00 DT 4574    
    08.55   Crash dive for training.  
    09.34   Surfaced.  
    12.00 DT 4739 Day's run 190 nm.  
      φ = 21° 54.5' N    
      λ = 27° 11' W    
      SSE 1, Sea 0, Vis. 10 nm    
    16.00 DT 4795    
    20.00 DT 7164 No traffic, nothing of note.  
           
    20.01.43 North Atlantic northwest of Cape Verde    
    00.00 DT 7423    
    04.00 DT 7458    
    08.00 DT 7724    
    09.12 DT 7724 Crash dive for training.  
    09.57   Surfaced.  
    12.00 DT 7757 Day's run 182.5 nm  
      φ = 18° 52.5' N    
      λ = 27° 42.5' W    
      ENE 1-2, Sea 1, Vis. 10-12 nm    
           
Sun and Moon Data 18.01.43
Sun and Moon Data 19.01.43
Sun and Moon Data 20.01.43
 
- 8 -
 
           
           
           
    continued      
    20.01.43 North Atlantic northwest of Cape Verde    
    13.15   Crash dive for training.  
    13.21   Surfaced.  
    16.00 EJ 1119    
    17.43 EJ 1148 Periscope sighted bearing 225°T.  Range about 2000 meters, not recognized exactly, because only sighted briefly twice.  
    20.00 EJ 1178 No traffic.  
           
    21.01.43 North Atlantic west of Cape Verde    
    00.00 EJ 1444    
    04.00 EH 3935    
    08.00 EH 3991    
    12.00 EH 6337 Day's run 195.5 nm.  
      φ = 15° 38.5' N    
      λ = 28° 19' W    
      NEbyE 3, Sea 2, Vis. 8-10 nm    
    16.00 EH 6385    
    20.00 EH 6652 No traffic, nothing of note.  
           
    22.01.43 North Atlantic southwest of Cape Verde    
    00.00 EH 6668    
    04.00 EH 6939    
    08.00 EJ 4775    
    12.00 EJ 7125 Day's run 173.5 nm.  
      φ = 13° 02' N    
      λ = 27° 36' W    
      NEbyE 3, Sea 2, Vis. 8-10 nm    
    12.13   Crash dive for training.  
    12.34   Surfaced.  
    16.00 EJ 7167    
    20.00 EJ 7433 No traffic, nothing of note.  
           
           
Sun and Moon Data 20.01.43
Sun and Moon Data 21.01.43
Sun and Moon Data 22.01.43
 
- 9 -
 
           
           
           
           
    23.01.43 North Atlantic south of Cape Verde    
    00.00 EJ 7546    
    04.00 EJ 7588    
    08.00 EJ 8762    
    12.00 EJ 7975 Day's run 167.5 nm.  
      φ = 10° 38' N    
      λ = 26° 07' W    
      NEbyN 4, Sea 3, Vis. 6 nm    
    16.00 ES 1328    
    20.00 ES 1391 No traffic, nothing of note.  
           
    24.01.43 North Atlantic southern part    
    00.00 ES 2414    
    04.00 ES 2457    
    08.00 ES 2723    
    09.33   Crash dive for training.  
    10.20   Surfaced.  
    12.00 ES 2844 Day's run 178 nm  
      φ =   8° 14.5' N    
      λ = 24° 24' W    
      ENE 2, Sea 1, Vis. 8 nm    
    16.00 ES 5221    
    20.00 ES 5265 No traffic, nothing of note.  
           
    25.01.43 North Atlantic southern part    
    00.00 ES 5377    
    04.00 ES 5655    
    08.00 ES 5697    
    11.12 - 11.31   Test dive.  
    12.00 ES 6745 Day's run 194 nm.  
      φ =   5° 38' N    
      λ = 22° 30' W    
      NEbyE 1, Sea 0, Vis. 8-10 nm    
    16.00 ES 6788    
    20.00 ES 9165    
    20.45   Crash dive for training.  
    20.51   Surfaced.  
           
           
Sun and Moon Data 23.01.43
Sun and Moon Data 24.01.43
Sun and Moon Data 25.01.43
 
- 10 -
 
           
           
           
           
    26.01.43 North Atlantic southern part    
    00.00 ES 9278    
    04.00 ES 9572    
    08.00 ES 9845    
    12.00 FD 3217 Day's run 223 nm.  
      φ =   2° 10' N    
      λ = 2'1° 36' W    
      SE 1-2, Sea 1, Vis. 10-12 nm    
    16.00 FD 3277 Equator baptism.  
    20.00 FD 3547 No traffic.  
           
    27.01.43 South Atlantic, Equator    
    00.00 FD 3841    
    04.00 FD 3878    
    08.00 FD 6251    
    12.00 FD 6282 Day's run 210 nm.  
      φ =   1° 10' S    
      λ = 21° 02' W    
      SE 2-3, Sea 1-2, Vis. 8-10 nm    
    14.43   Crash dive for training.  
    15.02   Surfaced.  
    15.04   Crash dive for training.  
    15.20   Surfaced.  
    16.00 FD 6562    
    20.00 FD 6675 No traffic, nothing of note.  
           
    28.01.43 South Atlantic, northern part    
    00.00 FD 6927    
    04.00 FD 6991    
    08.00 FE 7114    
    10.49   Crash dive for training.  
    11.06   Surfaced.  
    12.00 FE 7146 Day's run 167 nm.  
      φ =   3° 31' S    
      λ = 19° 28' W    
      ESE 3, Sea 2, Vis. 10 nm    
    16.00 FE 7188    
    20.00 FE 7462 No traffic, nothing of note.  
           
           
Sun and Moon Data 26.01.43
Sun and Moon Data 27.01.43
Sun and Moon Data 28.01.43
 
- 11 -
 
           
           
           
           
    29.01.43 South Atlantic, northwest of Ascension    
    00.00 FE 7572    
    04.00 FE 7825    
    07.47   Crash dive for training.  
    08.00 FE 7865    
    08.51   Surfaced.  
    12.00 FE 7977 Day's run 153.5 nm.  
      φ =   5° 35' S Difference between dead reckoning and actual position: 245°T, 7 nm/day  
      λ = 18° 06' W  
      SE 3-4, Sea 2-3, Vis. 10 nm    
    16.00 FL 3319    
    16.35 FL 3325 Crash dive for flying boat bearing 170°T, course 110°.  
    17.20   Surfaced.  
    17.38 FL 3352 Detection on 258 cm, vertically polarized, steady tone, dived.  
    18.21   Surfaced.  
    20.00 FL 3367 No traffic.  
           
    30.01.43 South Atlantic west of Ascension    
    00.00 FL 3637    
    04.00 FL 3697    
    08.00 FL 3967    
    12.00 FL 6361 Day's run 206 nm.  
      φ =   8° 49' S    
      λ = 17° 25' W    
      SEbyE 2-3, Sea 1-2, Vis. 10-12 nm    
    16.00 FL 6635    
    18.20   Outgoing Short Signal:  Position report in accordance with orders.  
    20.00 FL 6667 Main ballast and reserve fuel oil tank 7 and 2 converted into ballast tanks.  
        No traffic.  
           
    31.01.43 South Atlantic southwest of Ascension    
    00.00 FM 4477    
    01.53   Incoming Radio Message 2244/30 (Officer-Only):  Indicating the eastern limit of Route Anton.  
    04.00 FM 4728 Course altered to FU 43.  
    07.28   Crash dive for training.  
    07.35   Surfaced.  
    07.46   Crash dive for training.  
    08.00 FM 4793    
    08.33   Surfaced.  
    11.35   Incoming Radio Message 1041/31/491:  Orders for supply from "Wilamowitz"on 4 February at 09.00 hours in square FU 4455.  
           
Sun and Moon Data 29.01.43
Sun and Moon Data 30.01.43
Sun and Moon Data 31.01.43
 
- 12 -
 
           
           
           
    continued      
    31.01.43 South Atlantic southwest of Ascension    
    12.00 FM 4879 Day's run 176 nm.  
      φ = 11° 05.5' S    
      λ = 16° 01' W    
      EbyE 4, Sea 3, Vis. 10 nm    
    16.00 FM 7237    
    20.00 FM 7345 No traffic, nothing of note.  
           
    01.02.43 South Atlantic Ascension-Helena    
    00.00 FM 7385    
    04.00 FM 8414    
    08.00 FM 8455    
    12.00 FM 8495 Day's run 165.5 nm.  
      φ = 12° 47' S    
      λ = 13° 45' W    
      E 2, Sea 2, Vis. 8 nm    
    16.00 FM 8815    
    20.00 FM 8855 No traffic, nothing of note.  
           
    02.02.43 South Atlantic northwest St. Helena    
    00.00 FM 8898    
    04.00 FT 2319    
    08.00 FT 2383    
    12.00 FT 2633 Day's run 162 nm.  
      φ = 14° 48' S    
      λ = 11° 50' W    
      ESE 2, Sea 1-2, Vis. 10 nm    
    12.47   Crash dive for training.  
    13.52   Surfaced.  
    16.00 FT 3443    
    20.00 FT 3486 No traffic, nothing of note.  
           
    03.02.43 South Atlantic west of St. Helena    
    00.00 FT 3736    
    04.00 FT 3854    
           
           
Sun and Moon Data 31.01.43
Sun and Moon Data 01.02.43
Sun and Moon Data 02.02.43
Sun and Moon Data 03.02.43
 
- 13 -
 
           
           
           
    continued      
    03.02.43 South Atlantic west of St. Helena    
    07.58 FT 3895 Smoke feather in sight bearing 178°T, motor ship course 270°, 14 knots.  Size 5-6000 GRT.  Maneuvered ahead for day attack.  
    08.00 FT 3895 Appearance:  compact masts, rod antenna on the bridge, cannon on the stern.  No zig zags.  Speed matched.  
    12.00 FT 3788 Day's run 201 nm.  
      φ = 16° 33' S    
      λ = 11° 16.5' W    
      SE 3, Sea 2-3, Vis. 10 nm, swells    
    13.17 FT 6111 Dived to attack.  
    14.11   "      " Shot from tube III:  G7e, depth 3 meters, target speed = 14 knots, target angle = 68°, range = 1200 meters, missed.  
        Behavior of the enemy after the shot:  Determined by listening that the engines were stopped initially without changing course.  Afterwards heavy zig zags around 270° up to 90° and also with stopping and starting.  
    14.44 FT 6111 One or more heavy detonations heard, probably depth charges, nothing seen through the periscope.  Range to the steamer 6000 meters.  
    15.30   Steamer holds course 270° and quickly passes out of sight.  
        Assumption: Because steamer was lightly laden or in ballast, the torpedo passed under and thus the steamer was alerted. Otherwise behavior after the shot is inexplicable.  No further pursuit, because the enemy runs at high speed and with 5 hours AK-pursuit with heavy fuel consumption the boat is further removed from its operations area (a day before supply) and the boat is already detected.  Besides, further pursuit leads towards Route Anton.  
    16.00 FT 6114    
    16.54   Surfaced, continued transit.  
    20.00 FT 6120    
    21.46   Outgoing short signal:  Will arrive at supply point 1 day later.  
           
    04.02.43 South Atlantic west of St. Helena    
    00.00 FT 6244    
    04.00 FT 6283    
    08.00 FT 6377    
           
           
Sun and Moon Data 03.02.43
Sun and Moon Data 04.02.43
 
- 14 -
 
           
           
           
    continued      
    04.02.43 South Atlantic west of St. Helena    
    12.00 FT 6622 Day's run 163 nm.  
      φ = 17° 31.5' S    
      λ = 9° 33' W    
      EbyS 4, Sea 3, Vis. 10 nm    
    16.00 FT 6639    
    16.54 FU 4417 "U-459" in sight.  After recognition signals exchanged immediately begin resupply until darkness.  
    20.00 FU 4449 Connection released at night and stayed in contact.  Short briefing with "Wilamowitz", Seehund Orders accepted.  
           
    05.02.43 South Atlantic west of St. Helena    
    00.00 FU 4449    
    04.00 FU 4449    
    08.00 FU 4449 Begin transfer of a G7a, followed by the remaining fuel.  A total of 108 cbm taken over.  Total inventory 243 cbm.  
    12.00 FT 4449 Day's run 58 nm.  
      φ = 18° 9.5' S    
      λ = 8° 46' W    
      ESE 3-4, Sea 3, Vis. 10 nm    
    12.16 FU 4484 Departed from "U-459".  This supply and above all, the torpedo transfer went excellently in spite of stiff SE trade wind.   The supply by "Wilamowitz" was - as far as I am entitled to an opinion - exemplary.  
    12.58 FU 4484 Supplier out of sight, transit continued.  
        On course 120°.  
    16.00 FU 4731    
    20.00 FU 4817 No traffic.  
           
    06.02.43 South Atlantic west of St. Helena    
    00.00 FU 4855    
    04.00 FU 4896    
    08.00 FU 7313    
    12.00 FU 7337 Day's run 147 nm.  
      φ = 19° 30' S    
      λ = 6° 39' W    
      EbyS 4-5, Sea 4, Vis. 8 nm    
           
           
Sun and Moon Data 04.02.43
Sun and Moon Data 05.02.43
Sun and Moon Data 06.02.43
 
- 15 -
 
           
           
           
    continued      
    06.02.43 South Atlantic west of St. Helena    
    13.29   Crash dive for training.  
    13.55   Surfaced.  
    16.00 FU 8145    
    20.00 FU 8182 No traffic, nothing of note.  
           
    07.02.43 South Atlantic south of St. Helena    
    00.00 FU 8426    
    04.00 FU 8459    
    08.00 FU 8723    
    12.00 FU 8756 Day's run 143 nm.  
      φ = 21° 28' S    
      λ = 5° 51' W    
      ESE 4-5, Sea 4, Vis. 8 nm    
    13.30 EU 8759 Steamer in sight bearing 99°T, course 270°, target angle 0°, quickly growing larger, because it is coming out of the hazy horizon.  Do not succeed running off any more at GF, because the foredeck quickly rises out  
    13.32   Dived to attack submerged.  
        Enemy zig zags about 250°, estimate enemy speed at 14 knots.  Do not get near enough, abeam distance at target angle 90° about 2500 meters.  Because shooting data is not accurate enough to shoot, will pursue for night attack. 145 RPM from listening.  
        Appearance:  very long wide freighter in ballast, stern trimmed such that the foredeck is very high and propellers lie almost as deep as with a loaded freighter (shortening the underwater hull). Freighters load waterline set deeper, as with a loaded freighter.  Heavily compact masts, 5 hatches.  Between forward mast and bridge a king post with rod antenna.  Quick firing weapons on the bow and stern.  American flag.  Estimated 7000 GRT.  
    15.45   Surfaced, began pursuit.  
    16.00 FU 8782 Steamer zig zags 20-50° around general course 250°, speed 13-14 knots.  Steam from behind in the dusk in order to conserve fuel.  
    20.00 GF 2324    
    23.12 GF 2228 Shot from tube IV:  G7e, depth 2 meters, target speed = 14, target angle = 90°, range 1000 meters, miss.  
        Steamer zig zags away to starboard 100° after the shot on course 10°.  Miss unexplained, because only the forward and aft mast of the steamer could be seen in the binoculars.  
           
Sun and Moon Data 06.02.43
Sun and Moon Data 07.02.43
 
- 16 -
 
           
           
           
           
    08.02.43 South Atlantic    
    00.00 GF 2224 Steam along to get the exact speed.  
        Results 13 knots, not less!  
        Set up for a stern approach.  
    00.13 GF 2224 Shot from tube V:  G7e, depth 2 meters, target speed = 13 knots, target angle = 84°, range = 1200 meters.  
        Hit amidships, running time 86 seconds.  
        At the shot the steamer filled the binoculars.  Estimated size 8000 GRT.  
    00.16 GF 2224 Artillery fire from the steamer by quick firing weapon on the bow.  
    00.17   5 salvoes awaited, for the most part over or in the vicinity of the boat, then dived.  Caliber about 4 cm.  
    00.25   Surfaced.  
        Steamer is abandoned by the crew, stern somewhat settled, very broad ship.  4 boats and rafts.  Due to sea state and darkness artillery operation not advisable, because the ship is empty.  
    02.16 GF 2224 Shot from tube V:  G7e, depth 3 meters, coup de grâce, speed = 0, range = 1200 meters, failure!  
        While loading the torpedo had been lightly damaged, therefore used for the coup de grâce.  See Equipment Report.  
    02.33 GF 2224 Shot from tube I:  G7e, depth 3 meters, coup de grâce, range = 800 meters, hit after 50 seconds running time.  
        Heavy detonation (fuel explosion), steamer sinks over the stern post.  Afterwards went to the boats, only survivors on rafts found.  From them the name was spelled:  "ROGER B. TANNY" 10,000 GRT, empty from Cape Town for New York.  
        Assumption: the following camouflage for empty ships. Painted gray to the waterline, (to conceal draught). Trimmed by the stern, so that the propeller does not stick out and target surface is reduced under water.  
        Steamers have a man watching on the forecastle. When a torpedo under runs he reports to the bridge, afterwards heavy zig zags and increased attention.  
    04.00 GF 2255    
    07.21   Test dive.  
    08.00 GF 2265    
    08.04   Surfaced.  
    12.00 GF 2276 Day's run 183.5 nm.  
      φ = 22° 42' S    
      λ = 7° 05' W    
      EbyS 4-5, Sea 4-5, Vis. 8 nm    
           
Sun and Moon Data 08.02.43
 
- 17 -
 
           
           
           
    continued      
    08.02.43 South Atlantic    
    16.00 GF 2634    
    20.00 GF 3441    
           
    09.02.43 South Atlantic west of South Africa    
    00.00 GF 3481    
    04.00 GF 3732    
    06.50 - 07.23   Crash dive for training.  
    08.00 GF 3842    
    12.00 GF 3859 Day's run 152 nm.  
      φ = 24° 19.5' S    
      λ = 4° 54' W    
      EbyS 4, Sea 4, Vis. 8 nm    
    16.00 GF 3899 With abating wind prepared to download [torpedoes].  
    16.30   Begin downloading.  
    20.00 GF 3899    
    22.45   4 Atos downloaded, 2 bow - 2 stern room.  
           
    10.02.43 South Atlantic west of South Africa    
    00.00 GF 6312    
    00.01   Test dive.  
    00.21      
    04.00 GF 6353    
    08.00 GG 4172    
    12.00 GG 4431 Day's run 184 nm.  
      φ = 25° 34' S    
      λ = 3° 3.5' W    
      EbyS 1, Sea 0-1, Vis. 8-10 nm    
    16.00 GG 4542    
    17.23 - 17.43   Crash dive for training.  
    20.00 GG 4583 No traffic, nothing of note.  
           
    11.02.43 South Atlantic west of South Africa    
    00.00 GG 4912    
    04.00 GG 4962    
    08.00 GG 5773    
           
           
Sun and Moon Data 08.02.43
Sun and Moon Data 09.02.43
Sun and Moon Data 10.02.43
Sun and Moon Data 11.02.43
 
- 18 -
 
           
           
           
    continued      
    11.02.43 South Atlantic west of South Africa    
    12.00 GG 8132 Day's run 185 nm.  
      φ = 27° 21' S    
      λ = 0° 17' W    
      SSE 1-2, Sea 1, Vis. 10-12 nm    
    16.00 GG 8251    
    20.00 GG 8293 No traffic, nothing of note.  
           
    12.02.43 South Atlantic west of South Africa    
    00.00 GG 8387    
    04.00 GG 8635    
    07.17 - 07.50   Crash dive for training.  
    08.00 GG 9446    
    12.00 GG 9494 Day's run 171 nm.  
      φ = 28° 58' S    
      λ = 2° 22' E    
      SEbyE 4, Sea 3-4, Vis. 8 nm    
    16.00 GG 9815    
    20.00 GG 9864 No traffic, nothing of note.  
           
    13.02.43 South Atlantic west of South Africa    
    00.00 GG 9975    
    04.00 GQ 1336    
    08.00 GQ 2146    
    12.00 GQ 2191 Day's run 168 nm.  
      φ = 30° 42' S    
      λ = 4° 55' E    
      ESE 3, Sea 2, Vis. 8 nm    
    16.00 GQ 5511    
    20.00 GQ 2551 No traffic, nothing of note.  
           
Sun and Moon Data 11.02.43
Sun and Moon Data 12.02.43
Sun and Moon Data 13.02.43
 
- 19 -
 
           
           
           
           
    14.02.43 South Atlantic west of Cape Town    
    00.00 GQ 2567 Course changed to 180° to intercept South America traffic.  
    04.00 GQ 2837    
    08.00 GQ 2894    
    10.22 - 11.05   Crash dive for training.  
    12.00 GQ 5261 Day's run 172 nm.  
      φ = 33° 03' S    
      λ = 6° 07' E    
      SEbyE 1-2, Sea 0-1, Vis. 10-12    
    16.00 GQ 5531    
    20.00 GQ 5591 No traffic, nothing of note.  
           
    15.02.43 South Atlantic west of Cape Town    
    00.00 GQ 5591 Positioned 600 nm west of the main harbor, approaching the coast would only consume fuel, since we would arrive there 3 days before the full moon which makes it necessary to set off again. "Witte" and "Würdemann" are positioned off the main harbor.  Expect situation report.  
        Intention: transit to the south of Agulhas Bank.  Transit to the east.  
    04.00 GQ 5591    
    08.00 GQ 5595    
    12.00 GQ 5595 Day's run 67.5 nm.  
      φ = 34° 21.5' S Difference between dead reckoning and actual position after a navigation fix 138°T, 12.5 nm/day.  
      λ = 6° 14' E  
      NNW 1-2, Sea 0-1, Vis. 8 nm    
    16.00 GQ 5595    
    20.00 GQ 5598 No traffic, nothing of note.  
           
    16.02.43 South Atlantic west of Cape Town    
    00.00 GQ 5598    
    04.00 GQ 5599    
    08.00 GQ 5921    
    12.00 GQ 5936 Day's run 60 nm.  
      φ = 34° 40.5' S Difference between dead reckoning and actual position 100°T, 20 nm/day.  
      λ = 7° 40' E  
      SbyW 4, Sea 3, Vis. 6-8 nm    
           
Sun and Moon Data 14.02.43
Sun and Moon Data 15.02.43
Sun and Moon Data 16.02.43
 
- 20 -
 
           
           
           
    continued      
    16.02.43 South Atlantic west of Cape Town    
    16.00 GQ 6753    
    18.23 - 19.07   Crash dive for training.  
    20.00 GQ 6766 "Witte" reports intermittent traffic out of the main harbor and one to the east on the 100-meter line.  
           
    17.02.43 South Atlantic west of Cape Town    
    00.00 GQ 6763 Stopped to save fuel.  
    04.00 GQ 6735    
    08.00 GQ 6735    
    12.00 GQ 6735 Day's run 60 nm.  
      φ = 34° 38.5' S Difference between dead reckoning and actual position after a navigation fix: 339°T, 19nm/day.  
      λ = 8° 44' E  
      SbyW 2, Sea 1-2, Vis. 8-10 nm    
    14.55 - 15.15   Crash dive for training.  
    16.00 GQ 6732    
    20.00 GQ 6732 No traffic, nothing of note.  
           
    18.02.43 South Atlantic west of Cape Town    
    00.00 GQ 6732    
    04.00 GQ 6732    
    08.00 GQ 6733 Day's run ./.  
    12.00 GQ 6733 Difference between dead reckoning and actual position after a navigation fix: 30°T, 8 nm/day.  
      φ = 34° 34' S  
      λ = 8° 59' E    
      EbyS 2, Sea 1, Vis. 8-10 nm    
    16.00 GQ 6827    
    18.26 - 18.45   Crash dive for training.  
    19.17   Incoming Radio Message 1811/18/422:  "L a s s e n" receives freedom to maneuver in entire area up to and including KP.  
    20.00 GQ 6865 Intention:  Advance to south edge Agulhas Bank with course to Cape Francis.  Arriving there by the waning moon.  
           
           
Sun and Moon Data 16.02.43
Sun and Moon Data 17.02.43
Sun and Moon Data 18.02.43
 
- 21 -
 
           
           
           
           
    19.02.43 South Atlantic west of Cape Town    
    00.00 GQ 6865    
    04.00 GQ 6866    
    08.00 GQ 6947    
    12.00 GQ 6984 Day's run 97 nm.  
      φ = 35° 20' S Difference between dead reckoning and actual position after a navigation fix: 123°T, 14 nm/day.  
      λ = 10° 33.5' E  
    16.00 GQ 9331    
      SbyW 7-8, Sea 6-7, Vis. 8 nm    
    20.00 GR 7117 Night stopped due to the heavy sea.  
        "W ü r d e m a n n" reports no traffic in the vicinity of the main harbor and up to the limit of the area to the south.  
        "C l a u s e n" reports sinking in square KZ 42, course 285°, otherwise no traffic.  
           
    20.02.43 South Atlantic southwest of Cape Town    
    00.00 GQ 9339    
    04.00 GQ 9338    
    08.00 GQ 9363    
    12.00 GR 7146 Day's run 86 nm.  
      φ = 35° 55' S Difference between dead reckoning and actual position after a navigation fix: 270°T, 22.5 nm/day.  
      λ = 11° 39' E  
      SE 4-5, Sea 4, Vis. 4-6 nm    
    15.15 - 15.31   Crash dive for training.  
    16.00 GR 7191    
    20.00 GR 7275    
    23.26   Incoming Radio Message 2220/20/436:  To "S e e h u n d".  Attack area "Clausen" north of the latitude of KP 6990, "Lassen" south of the latitude of KZ 3390, naval squares.  
        Headed for the south edge of the Agulhas Bank on course 120°.  
           
    21.02.43 South Atlantic southwest of Cape Town    
    00.00 GR 7294    
    04.00 GR 7376    
    08.00 GR 7631    
    12.00 GR 8415 Day's run 172 nm.  
      φ = 36° 26' S Difference between dead reckoning and actual position after a navigation fix: 220°T, 7 nm/day.  
      λ = 15° 7.5' E  
      EbyS 2, Sea 1, Vis. 10-12 nm    
           
Sun and Moon Data 19.02.43
Sun and Moon Data 19.02.43
Sun and Moon Data 20.02.43
 
- 22 -
 
           
           
           
    continued      
    21.02.43 South Atlantic southwest of Cape Town    
    16.00 GR 8434    
    20.00 GR 8518 No traffic, nothing of note.  
           
    22.02.43 South Atlantic south of Cape Town    
    00.00 GR 8561    
    04.00 GR 8645    
    05.08 - 05.43   Test dive.  
    08.00 GR 8656    
    12.00 GR 9448 Day's run 170.5 nm.  
      φ = 36° 54' S    
      λ = 18° 35' E    
      SWbyW 3, Sea 2-3, Vis. 8-10 nm    
    16.00 GR 9483    
    20.00 GR 9572 No traffic, nothing of note.  
           
    23.02.43 South Atlantic south edge of the Agulhas Bank    
    00.00 GR 9588    
    04.00 GR 9598    
    08.00 GR 9676    
    12.00 GR 9691 Day's run 153 nm.  
      φ = 36° 59' S    
      λ = 21° 43.5' E    
      W 4-5, Sea 3-4, Vis. 8 nm, steep swells    
    16.00 KY 8345 Heavily growing Sea state from astern, course changed to 30° to take the seas from astern to port.  
    20.00 KY 8353 No traffic.   
           
    24.02.43 South Atlantic southeast of the Agulhas Bank    
    00.00 KY 8336    
    04.00 KY 6778    
    04.46   Dived due to the huge seas from astern.  
           
Sun and Moon Data 21.02.43
Sun and Moon Data 22.02.43
Sun and Moon Data 23.02.43
Sun and Moon Data 23.02.43
 
- 23 -
 
           
           
           
    continued      
    24.02.43 South Atlantic southeast of the Agulhas Bank    
    08.00 KY 9121    
    11.05 - 11.17   Ventilated the boat.  
    12.00 KY 9122 Day's run 106 nm.  
      φ = 36° 27' S Difference between dead reckoning and actual position after a navigation fix: 155°T, 33 nm/day.  
      λ = 23° 41' E  
      SbyE 5, Sea 5, Vis. 2-3 nm    
    16.00 KY 9134    
    17.14   Surfaced.  
    20.00 KY 9136 No traffic, nothing of note.  
           
    25.02.43 Indian Ocean south of Port Elizabeth    
    00.00 KY 9222 Intention:  Advance to the north at 100 to 120 nm distance from the coast to remain beyond the current, then to the south of Durban close under land.  
    02.39   Outgoing Radio Message 2317/24/451:  Reported situation in accordance with orders.  
    04.00 KY 6977    
    08.00 KY 6985    
    12.00 KY 6966 Day's run 105 nm.  
      φ = 35° 56' S Difference between dead reckoning and actual position after a navigation fix: 341°T, 9.6 nm/day.  
      λ = 26° 36' E  
      ENE 1, Sea 0-1, Vis. 8-10 nm    
    16.00 KZ 4723    
    20.00 KZ 4572 No traffic, nothing of note.  
           
    26.02.43 Indian Ocean southeast coast of Africa    
    00.00 KZ 4553    
    04.00 KZ 4614    
    08.00 KZ 4373    
    12.00 KR 4329 Day's run 200 nm.  
      φ = 33° 55.5' S    
      λ = 29° 50' E    
      NW 2, Sea 1, Vis. 10-12 nm    
           
Sun and Moon Data 24.02.43
Sun and Moon Data 25.02.43
Sun and Moon Data 26.02.43
 
- 24 -
 
           
           
           
    continued      
    26.02.43 Indian Ocean southeast coast of Africa    
    16.00 KZ 2774    
    20.00 KZ 2745 Course changed to 0°.  Intention:  Advance to the coast, submerged by day.  Boat is not to be seen at all cost, because advance is intended directly off the main harbor.  
        No traffic, nothing of note.  
           
    27.02.43 Indian Ocean east coast of Africa    
    00.00 KZ 2475    
    04.00 KZ 2412    
    04.19   Dived, proceeding submerged by day.  Course set to South Sand Bluff.  
    08.00 KZ 2411    
    11.15 KZ 1396 A fast land-based aircraft sighted through the periscope bearing 310°T.  Southerly course parallel to the coast.  Boat proceeds with half hourly all around periscope sweeps.  
    12.00 KR 1396 Day's run 148 nm.  
      φ = 31° 47' S    
      λ = 30° 10' E    
      NNE 1, Sea 0-1, Vis. 2-3 nm    
    16.00 KZ 1395    
    18.12   Surfaced.  
    18.28 KZ 1391 Navigation fix on "Cape Hermes" and "South Sand Bluff" Lighthouses bearing 276°T and 70°T.  
    20.00 KZ 1367 No traffic, after charging stopped, current 4.5 knots to the SW parallel to the coast.  
           
    28.02.43 Indian Ocean southeast coast of Africa south of Durban    
    00.00 KZ 1339    
    04.00 KZ 1365    
    04.03   Navigation fix on "South Sand Bluff" and sounding line.  Dived, proceeding submerged against the current.  
    08.00 KZ 1365    
    12.00 KZ 1367 Day's run 58 nm.  
      φ = 31° 30' S    
      λ = 29° 54' E    
           
Sun and Moon Data 26.02.43
Sun and Moon Data 27.02.43
Sun and Moon Data 28.02.43
 
- 25 -
 
           
           
           
    continued      
    28.02.43 East coast of Africa south of Durban    
    16.00 KZ 1367    
    18.06   Surfaced.  Boat advances against the strong current.  
    20.00 KZ 1339 Course 40°, advancing to the 80 to 100-meter line.  Distance from land 4 nm.  
    22.12 KZ 2114 South Sand Bluff Lighthouse out of sight astern, Port Shepstone extinguished, apart from that identification of the other lighthouses as in peacetime.  
        No traffic.  
           
    01.03.43 East coast of Africa south of Durban    
    00.00 KZ 2111    
    03.52 KP 5751 Shortly before diving in the morning twilight a passenger steamer in sight bearing 95°T, course 30°.  Briefly attempted to maneuver ahead, then dived due to brightness.  No possibility of attack.  
    04.00 KP 8781    
    04.07   Dived.  Remained at periscope depth.  
    04.45 KP 8781 Freighter sighted bearing 80°T, course 30°, both ships driving about 14-16 knots, zig zagging up to 50°, lowest range = 5000 - 8000 meters.  
    05.20 KP 8781 By sound, mastheads of a destroyer detected bearing 177°T, course 30°, speed 15-18 knots, Type "JERVIS", lowest range = 4000 meters or more.  Up to now no possibility of attack.  
    06.00 KP 8781 Both steamers and destroyer are lost from sight bearing 50°T.  Estimated size 6 and 8000 GRT.  
    08.00 KP 8781    
    08.30 KP 8781 Steamer sighted bearing 220°T, at the same time a flying boat, course 30°.  Approaching quickly, initiated attack.  Due to zig zags passed by.  Speed 16-18 knots, auxiliary cruiser type, 6000 GRT with American flag.  Apparently empty.  Lowest range = about 2000 meters.  
    09.16 KP 8781 Escort boat in wake of the auxiliary cruiser, white lettering "LB I", high speed.  
    09.25 KP 8781 Boat was alerted by heavy propeller sounds to a second escort boat, that approached with sharp target angle and high speed behind the first escort vessel and passes at low range, about 150 meters.  
    09.39 KP 8781 Both escort boats out of sight bearing 30°T.  
    09.47 KP 8781 Steamer out of sight bearing 30°T.  
           
           
Sun and Moon Data 28.02.43
Sun and Moon Data 01.03.43
 
- 26 -
 
           
           
           
    continued      
    01.03.43 East coast of Africa south of Durban    
    12.00 KP 8757 Day's run 68 nm.  
      φ = 30° 37' S In spite of heavy day traffic here submerged attack possibilities are limited.  Boat is up to now unnoticed, therefore attempt to reach a position for night attack on the observed traffic  
      λ = 30° 35.5' E  
      NNE 1, Sea 0-1, Vis. 8 nm  
    16.00 KP 8757    
    18.09   Surfaced.  
    19.00 KP 8752 A faint light on the horizon bearing 65°T, developed into a very fast passenger steamer with faint top lanterns.  Course 200°, speed about 20 knots.  
    19.57 KP 8755 Pursuit at AK broken off, because bearing shift amounts to 5° in 5 minutes.  Slight zig zags around 200°.  Single smoke stack, size about 10000 GRT.  
    20.00 KP 8755    
    20.06 KP 8755 Passenger steamer out of sight bearing 205°.  
    22.28 KP 8722 Land detection on 156 cm.  Search detection with volume 3-5.  Initially ran off on northeasterly courses, zig zagged every 5 minutes, detection grows louder.  Ran off to the south and west, detection grows fainter volume 3.  Detection shifts searching, sometimes up to 1-minute duration on the boat then subsiding again at regular intervals.   Because I do not get out the detection area, stopped remained lying until the next morning. Up to now the boat is unnoticed and is positioned very close under land.  No attack.  Beacons extinguished.  
        Intention:  By day get closer to the main harbor to observe traffic, then operate on the night route.  
           
    02.03.43 East coast of South Africa south of Durban    
    00.00 KP 8725    
    03.30 KP 8725 Last detection.  Up to that point detections were all 4-5 minutes.  
    04.00 KP 8725    
    04.03 KP 8725 Dived.  
    07.53 KP 8722 Freighter sighted bearing 214°T, course 20° with land-based aircraft as close escort.  Distance from the coast 1 -1-1/2 nm.  Estimated size 4-5000 GRT.  Low speed.  No possibility of attack.  Range = roughly 4000 meters.  
           
Sun and Moon Data 01.03.43
Sun and Moon Data 02.03.43
 
- 27 -
 
           
           
           
    continued      
    02.03.43 East coast of South Africa south of Durban    
    08.00 KP 8722    
    08.30 KP 8722 5 steamers, 2 escorts sighted bearing 68°T, course 200°, out of range (superstructure just over the horizon).  With land-based aircraft as remote and close escort.  
    08.40 KP 8722 A formation of land-based aircraft over the convoy.  
        True bearing of the forward, center and aft ships:  70°, 68° 67°.  The whole day by heavy air.  
    12.00 KP 8725 Day's run 75.5 nm.  
      φ = 30° 14' S    
      λ = 30° 56.5' E    
      NEbyE 1-2, Sea 1, Vis. 8 nm    
    16.00 KP 8728    
    18.10   Surfaced.  
    20.00 KP 8776 Intention:  Deploy by day so that outbound traffic or convoy sighted one or two hours before evening twilight can be pursued, therefore back and forth on the 200-meter line about at Port Shepstone.  
           
    03.03.43 East coast of South Africa south of Durban    
    00.00 KZ 2114    
    04.00 KP 8778    
    04.01   Submerged with half hourly all around periscope sweeps.  
    08.00 KZ 2111    
    12.00 KZ 2111 Day's run 59 nm.  
      φ = 31° 03' S    
      λ = 30° 19' E    
      NEbyN 3-4, Sea 3, Vis. 8 nm    
    14.00 KZ 2111 Convoy in sight bearing 46.5°T.  10 ships, 3 escort aircraft, course 200°, outside the 200-meter line.  Ran immediately on course 180°.  Land-based aircraft over the convoy.  8 freighters and 2 tankers counted, formation:  staggered line ahead.  
        Escort:  on both sides one U-boat hunter, forward a corvette,   On approaching closer to the lateral screen, modern U-boat hunter with sound gear installed.  Positioned unfavorably for a day attack, because far shot is only possible on one steamer.  Convoy speed 8 knots.  Therefore remained unnoticed and pursued.  
           
           
Sun and Moon Data 02.03.43
Sun and Moon Data 03.03.43
 
- 28 -
 
           
           
           
    continued      
    03.03.43 East coast of South Africa south of Durban    
    16.00 KZ 1339 Ships are all loaded, some freighters with high wooden structures as deck cargo  
    18.05   Surfaced.  In the twilight only brief contact on mastheads, convoy has changed course to SE.  
    19.02 KZ 1366 Aircraft with set lights over the convoy.  In oncoming darkness contact lost for a short time, pursued at GF and closed again.  
    19.38 KZ 1369 Detection on 138 cm range sea craft searching, later steady tone, volume 5.  
    20.00 KZ 2171 Despite often loud steady tones (sometimes 5 minutes long) no attack by escorts observed.  Aircraft are no longer seen.  Escorts remain positioned at the sides, one corvette ahead sweeping to and fro.  Convoy formation:  double echelon line ahead, speed 8 knots.  
        Run to from astern and pursue into the convoy to the level of the third ship from the rear.  Sequence of the ships to starboard 6000 GRT freighter, 8000 GRT tanker, 7000 GRT freighter.  To port a second line ahead.  Come to starboard to shoot.  
    21.22 KZ 2175 Shot from tube I:  G 7e, depth 3 meters, target speed = 8 knots, target angle = 110°, range = 1000 meters.  
        Hit after 55 seconds running time (825 meters).  
    21.22 KZ 2175 Shot from tube II:  G 7e, depth 3 meters, target speed = 8 knots, target angle = 100°, range = 1800 meters.  
        Hit amidships after 95 seconds running time (1425 meters).  
    21.23 KZ 2175 Shot from tube III:  G 7e, depth 3 meters, target speed = 8 knots, target angle = 100°, range = 1200 meters.  
        Hit after 101 seconds running time (1515 meters).  
        Tanker sinks immediately after dark red explosion.  Crew of the freighter takes to the boats.  First steamer sinks after 10 minutes.  Second freighter breaks amidships, sinks slowly over the stern.  Defense:  A U-boat hunter at the sinking location searches with a searchlight.  Both of the other escorts shoot alternately with star shells.  I get out to the rear of the convoy, the boat remains unseen, while the convoy in the bright light of the star shells and searchlight can be distinguished easily.  Also now and again sea detection with continuous tone, then a strong depth charge shock without anything being seen.  
           
Sun and Moon Data 03.03.43
 
- 29 -
 
           
           
           
    continued      
    03.03.43 East coast of South Africa south of Durban    
        A steamer shoots with anti-aircraft weapons roughly in the direction of the boat after a depth charge detonation.  The firing ship now changes course with night signaling apparatus.  To wit:  red-red-white course change to port and green-green-red the same to starboard.  
        After things settle down, initiated the second attack.  Came to firing position on 2 freighters, again pursuing from the rear.  
    23.10 KZ 2413 Shot from tube I:  G 7a, depth 3 meters, target speed = 8 knots, target angle = 80°, range = 1500 meters.  
        Hit amidships after 82 seconds (1640 meters).  
    23.11 KZ 2413 Shot from tube IV:  G 7a, depth 3 meters, target speed = 8 knots, target angle = 80°, range = 1500 meters.  
        Hit amidships after 74 seconds running time (1480 meters).  
        Both freighters sink.  Estimated size 5000 and 6000 GRT.  One had already disappeared after the explosion smoke dissipates, the second sinks slowly over the stern.  Last observation after 20 minutes bow positioned up and down.  Defense:  escort at sinking location, otherwise no star shells, no course changes with night signaling apparatus.  
    23.20 KZ 2421 Sea detection up to 23.20 hours, then set off.  Convoy has zig zagged from SE over E to SE.  Hold contact on a large steamer, shortly before attacking makes a full circle zig zag.  Afterwards forms a group with two freighters on course 90°.  A second group is only faintly still made out, apparently zig zagged to the S.  Escorts are no longer seen, Convoy has split.  Hold contact on these three freighters and run to attack.  All three are very large ships, including also the lead ship.  
           
    04.03.43 Indian Ocean southeast of Durban.    
    00.00 KZ 2421 Ships have increased speed, by matching speed from astern estimated 12 knots.  Attack with stern tubes on 2 freighters, each 8000 GRT including the lead ship.  Formation:  echelon line ahead, third freighter for the most part overlapped and further off.  
    01.13 KZ 2422 Shot from tube V:  G 7e, depth 3 meters, target speed = 12 knots, target angle = 80°, range = 1200 meters.  Miss!  
    01.14 KZ 2422 Shot from tube VI:  G 7e, depth 3 meters, target speed = 12 knots, target angle = 100°, range 1200 meters.  Miss!  
        Cause 2 knot speed over estimation.  After repeating matching speed results:  enemy speed 10 knots.  
           
           
Sun and Moon Data 03.03.43
Sun and Moon Data 04.03.43
 
- 30 -
 
           
           
           
    continued      
    04.03.43 East coast of South Africa south of Durban    
    01.46 KZ 2423 Second attack with bow tubes.  
        Shot from tube II:  G 7e, depth 4 meters, target speed = 10 knots, target angle = 80°, range = 1000 meters.  
        Hit after 66 seconds running time (990 meters).  
    01.47 KZ 2423 Shot from tube III:  G 7e, depth 4 meters, target speed = 10 knots, target angle = 90°, range = 1500 meters.  
        Hit after 74 seconds running time (1110 meters).  
        First freighter remains lying with hit in foreship and heavily down by the bow.  Propeller peeks out of the water.  
        Second freighter remains lying after hit amidships with heavy oil fire.  The crew of both ships takes to the boats and abandons ship.  
        Third steamer zig zags to the south at high speed.  At the moment have no torpedoes ready, one each bow and stern being reloaded.  
        Pursuit of the third freighter broken off, because I can no longer get in position for a night attack.  
        Therefore as soon as torpedoes reloaded shoot a coup de grâce on the first steamer, still only floating on the hatches.  
    02.36 KZ 2423 Coup de grâce from tube I:  G 7e, depth 4 meters, range = 1000 meters.  Failure, unexplained.  
    02.41 KZ 2423 While turning for a coup de grâce with stern torpedo a destroyer comes in sight with target angle 0°, about bearing 260°T.  Ran off at AK because the moon and approaching twilight permit no further attack.  Sinking of both freighters is probable.  
    03.30 KZ 2423 Both freighters and destroyer out of sight, the latter probably conducting rescue operations.  
    04.00 KZ 2186 Dived.  
        Intention:  Advance to the N for surprise advance off Cape Santa Lucia  
        Up to now no Radio Message, because convoy split and other boats are too far away, pursuit by day due to air patrols and closeness to land hopeless.  
    05.05 KZ 2186 Land-based aircraft sighted through the periscope.  
    08.00 KZ 2183    
    12.00 KZ 2159 Day's run 121 nm.  
      φ = 31° 33' S    
      λ = 31° 00' E    
      S 3, Sea 2, Vis. 8 nm    
           
Sun and Moon Data 04.03.43
 
- 31 -
 
           
           
           
    continued      
    04.03.43 Indian Ocean southeast of Durban    
    16.00 KZ 2161    
    18.04   Surfaced.  
    19.10   Outgoing Radio Message 1707/4/491:  Successes and situation report sent.  
    20.00 KZ 2136    
           
    05.03.43 Indian Ocean east of Durban    
    00.00 KP 8873    
    04.00 KP 8829    
    04.04   Dived.  
    08.00 KP 8826    
    12.00 KP 8831 Day's run 106.5 nm.  
      φ = 30° 07' S    
      λ = 32° 17' E    
      ESE 4-5, Sea 4, Vis. 6-8 nm    
    16.00 KP 8598    
    18.04   Surfaced, no navigation fix.  
    20.00 KP 8671 No traffic.  
           
    06.03.43 South east Africa, northeast of Durban    
    00.00 KP 8658    
    04.00 KP 8639 Dived.  Intention to reload abandoned due to heavily freshening SE-wind, producing large Sea state.  
    08.00 KP 8639    
    12.00 KP 8636 Day's run 94 nm.  
      φ = 29° 21' S    
      λ = 33° 47' E    
      EbyS 5-6, Sea 5, Vis. 6-8 nm    
    16.00 KP 9411    
    17.45   Surfaced, night stopped due to large seas from land.  No navigation fix.  
    20.00 KP 9411    
    23.52   Incoming Radio Message 1026/6/402:  "To L a s s e n" Well done.  
           
Sun and Moon Data 19.03.43
Sun and Moon Data 19.03.43
Sun and Moon Data 20.03.43
 
- 32 -
 
           
           
           
           
    07.03.43 South east Africa, east of Durban    
    00.00 KP 9411    
    04.00 KP 9411    
    04.21   Dived.  
    08.00 KP 9411    
    12.00 KP 9412 Day's run 15.5 nm.  
      φ = 29° 12' S    
      λ = 34° 01.5' E    
      EbyN 5, Sea 4, Vis. 4-6 nm    
    16.00 KP 9413    
    17.46   Surfaced.  No navigation fix.  
    20.00 KP 9413 No traffic.  
           
    08.03.43 South east Africa, north of Durban    
    00.00 KP 9413 Intention:  Run to the coast, as for days no navigation fix.  
    04.00 KP 9413 Dived.  
    08.00 KP 9187    
    11.44 KP 9187 By sound tanker sighted bearing 120°T, course 280°.  Only masts and superstructure out, no possibility of attack.  I believe that the tanker will still enter the main harbor by day.  
        (Assumed position directly off main harbor, therefore, not pursued).  
    12.00 KP 9179 Day's run 17 nm.  
      φ = 29° 09' S    
      λ = 34° 07' E    
      E 4, Sea 4, Vis. 6-8 nm, medium swell    
    12.53 KP 9179 Tanker out of sight bearing 260°.  Estimated speed 11 knots.  
    16.00 KP 9178    
    17.53   Surfaced.  
    19.06 KP 9178 Freighter in sight bearing 100°T.  Course 300°, zig zagging 30°, speed 12 knots, estimated size 7000 GRT.  
    20.00 KP 9174 Have maneuvered ahead, matched enemy speed, approach for shot with stern torpedo.  
    20.20 KP 9174 Shot from tube VI:  G 7e, depth 3 meters, target speed = 12 knots, target angle = 41°, range = 800 meters.  
        Hit forward edge of the bridge after 21 seconds running time (315 meters).  Very high fire column, highly combustible cargo, suspect cotton.  
           
           
Sun and Moon Data 19.03.43
Sun and Moon Data 19.03.43
Sun and Moon Data 20.03.43
 
- 33 -
 
           
           
           
    continued      
    08.03.43 South east Africa, north of Durban    
    20.32 KP 9174 Coup de grâce from tube III:  G 7a, depth 4 meters, hit after 44 seconds running time.  Steamer breaks apart in thirds.  Cargo burns above all.  Refrain from other finishing shot, because steamer still floats temporarily on the cargo, afterwards, however, will sink.  Every now and then burning cargo flies in the air.  Crew is in the boats.  Run off to reload, because the fire glow remains visible.  
    23.30   Begin reloading.  
           
    09.03.43 South east Africa, north of Durban    
    00.00 - 03.00 KP 8383 Transfer ended.  All torpedoes below deck (1 Eto and 5 Atos).  
    03.06 - 03.16   Test dive.  
    04.00 KP 8383 Dived.  Intention:  Detect day and night traffic at Santa Lucia and then during the full moon period set off to operate on observed traffic.  
    08.00 KP 8382    
    12.00 KP 8381 Day's run 61.5 nm.  
      φ = 28° 55' S    
      λ = 33° 04' E    
      NEbyE 2, Sea 1, Vis. 5-6 nm    
    16.00 KP 8373    
    17.48   Surfaced.  
    20.00 KP 8371    
    21.31 KP 8266 Land is made out, beacons are extinguished, boat remains lying stopped on the 200-meter line.  
    23.21   Incoming Radio Message 1320/9/425:  To "L a s s e n"  
        In grateful appreciation of your exemplary operations in the battle for the future of our people I award you as 208th soldier of the German Armed Forces the Oak Leaves to the Knight's Cross of the Iron Cross.  
                                        A d o l f   H i t l e r .  
           
    10.03.43 South east Africa, north of Durban    
    00.00 KP 8263    
    04.00 KP 8265    
    04.07   Dived.  
           
           
Sun and Moon Data 08.03.43
Sun and Moon Data 09.03.43
Sun and Moon Data 10.03.43
 
- 34 -
 
           
           
           
    continued      
    10.03.43 South east Africa, north of Durban    
    04.43 KP 8268 Steamer sighted bearing 10°T.  Zig zagging around 200°.  Very fast ship, no possibility of attack.  Range about 8000 meters.   Heading for the coast here at dawn. I suppose also here outbound traffic in the late afternoon.  As to the south of Durban  
    08.00 KP 8291    
    12.00 KP 8291 Day's run 65 nm.  
      φ = 28° 57' S    
      λ = 32° 13.5' E    
      NE 4-5, Sea 3, Vis. 8 nm    
    16.00 KP 8294    
    17.48   Surfaced, despite exhaustive all around sweep nothing seen, nothing heard.  
    17.49 KP 8294 Four ships two destroyers in sight bearing 230°T, course 50°, range = 8000 meters or more.  
        Put convoy astern, blow with pressure air, attempt to approach.  Am located in favorable position on the dark horizon and hope to have luck reaching attack position.  No forward escort noticed, to each side of the steamers is a destroyer.  Formation of the steamers line abreast.  
    18.00 KP 8294 Crash dive due to aircraft detection.  Steady tone strength 5 on 169 cm horizontally polarized.  Attempt to reach attack position submerged, however cannot see in the periscope.  Intend to let convoy pass over me and then pursue, in the hope that detection only persists until moonset.  
    19.35   Surfaced, pursued.  
    19.45 KP 8294 Crash dive for aircraft detection as above.  
    20.00 KP 8294    
    20.55   Surfaced, pursued.  
    21.06 KP 8298 Crash dive for aircraft detection as above.  
    22.43   Surfaced, pursued.  
    23.02 KP 8299 Crash dive for aircraft detection as above.  
        Pursuit broken off, because reaching the position for a night attack is no longer possible.  Enemy speed 10 knots.  I see at the moment no possibility, with such a small number - in this case 6 vessels including escorts to reach attack position, if the boat is detected by air locating.  One cannot wait for the attack of an aircraft at night, because the attack is seen too late. With a larger number of vessels  
           
Sun and Moon Data 10.03.43
 
- 35 -
 
           
           
           
    continued      
    10.03.43 South east Africa, north of Durban    
        I believe that air locating in the vicinity of the convoy is ineffective.  
      As countermeasure one needs a detection screen, i.e. a device that isolates the boat against the detection frequency.  
    23.12   Surfaced.  
           
    11.03.43 South east Africa, north of Durban    
    00.00 KP 8612 Crash dive for aircraft detection as above.  
    00.42   Surfaced.  
    01.28   Outgoing Radio Message 1807/10/433:  Kr Kr from "L a s s e n"
        18.00 hours naval square KP 8294.  Four ships two destroyers, 10 knots, course 50°.  No contact due to aircraft detection.  
    01.40 KP 8613 Crash dive for aircraft detection as above.  
    02.14   Surfaced.  
    02.42 KP 8621 Crash dive for aircraft detection as above.  
    03.14   Surfaced.  
    03.58   Dived to proceed submerged.  
    04.00 KP 8625    
    08.00 KP 8626    
    12.00 KP 8636 Day's run 83 nm.  
      φ = 29° 19' S    
      λ = 33° 37.5' E    
      NEbyN 4, Sea 3, Vis. 8 nm    
    16.00 KP 9414    
    17.49   Surfaced.  
    19.20 KP 9179 Shadows in sight bearing 300°T, freighter, course 280°T, estimated at 6000 GRT.  
    20.00 KP 9178 Matched speed, 10 knots.  Come to shooting position with bow tubes.  
    20.17 KP 9178 Shot from tube I:  G 7a, depth 4 meters, target speed = 10 knots, target angle = 80°, range = 1500 meters.  
        Hit after 45 seconds running time (900 meters).  
    20.17 KP 9178 Shot from tube II:  G 7a, depth 4 meters, target speed = 10 knots, target angle = 110°, range = 1500 meters.  
        Hit after 41 seconds running time (820 meters).  
        Heavy detonations, however steamer still floats on the hatches.  Crew abandons ship.  I decide on a coup de grâce.  
    20.32 KP 9178 Shot from tube V:  G 7a, depth 5 meters, hit after 32 seconds running time (640 meters).  
           
Sun and Moon Data 10.03.43
Sun and Moon Data 11.03.43
 
- 36 -
 
           
           
           
    continued      
    11.03.43 South east Africa, north of Durban    
    20.35 KP 9178 Steamer is sunk over the stern.  Approached a boat, name was lettered "A R Y B A N" 6000 GRT, taking piece goods to Durban.  
           
    12.03.43 South east Africa, northeast of Durban    
    00.00 KP 8395 Intention:  Operate on observed course.  
    04.00 KP 8369    
    08.00 KP 8392    
    12.00 KP 8398 Day's run 103 nm.  
      φ = 29° 07' S    
      λ = 33° 36.5' E    
      NNE 4, Sea 3-4, Vis. 8 nm    
    16.00 KP 8632    
    20.00 KP 8399 No traffic, nothing of note.  
           
    13.03.43 South east Africa, northeast of Durban    
    00.00 KP 9184    
    04.00 KP 9184    
    04.04 - 05.10   Test dive.  
    06.48 KP 9189 Smoke feather sighted bearing 38°T.  
    06.53 KP 9189 Another smoke feather sighted bearing 50°T.  
        1 mast and smoke stack comes out on both.  Look like patrol vessels, both zig zagging on general course 230°, slow speed.  
    08.00 KP 9185 Maneuvered ahead, however such that I am laterally displaced so as not to come between both, if it is a patrol group.  
    08.13   Dived.  Through the periscope both vessels were perfectly recognized as patrol vessels or U-boat hunters.  Fishing trawler silhouette.  
    09.19 KP 9185 Both patrol vessels suddenly have target angle 0° and run towards the boat with operating sound gear.  Believe the boat has been detected by sound gear, because both patrol vessels have regular zig zags, whereby the outer has a broad target angle about abeam before turning at about 2000 meters.  
        Go at LF to depth A +20 meters, then at silent speed and ran off on changing courses.  
           
           
Sun and Moon Data 11.03.43
Sun and Moon Data 12.03.43
Sun and Moon Data 13.03.43
 
- 37 -
 
           
           
           
    continued      
    13.03.43 South east Africa, northeast of Durban    
        Because the boat has not been sighted, the enemy also has no clue as to the validity of his detection.  By listening the RPM of the patrol vessels remain the same.  After some time regular moving on is determined  
      Nevertheless I am convinced that boat was held temporarily by the gear.  
    11.30 KP 9181 At periscope depth still only very faint smoke cloud of the patrol vessels bearing 270°T.  Assumption:  search group.  
    12.00 KP 9181 Day's run 98.5 nm.  
      φ = 28° 54.5' S    
      λ = 34° 22.5' E    
      NEbyN 2, Sea 1, Vis. 10 nm    
    16.00 KP 9182    
    16.07   Surfaced.  
    20.00 KP 9164    
           
    14.03.43 South east Africa, northeast of Durban    
    00.00 KP 9135 Night stopped.  "Clausen" reports sinking in square KP 6827, course 240°.  
    04.00 KP 9135 Intention:  Search for day traffic, heading for the coast on courses 280-300°.  
    08.00 KP 9247    
    12.00 KP 9521 Day's run 102 nm.  
      φ = 29° 15.5' S    
      λ = 35° 28' E    
      SbyE 2-3, Sea 1-2, Vis. 10 nm    
    13.44   Incoming Radio Message 1228/14/452:  2)  For "Seehund boats" supply in the lower third of naval square DG is anticipated.  Kommandants decide on own return transit with or without supply based on own situation (number of torpedoes, traffic).  Report intentions later when starting return transit.  
        I had counted on supply in the lower third of EH in accordance with "Seehund Operations Order", therefore I decide on return transit.  Because traffic could only be detected with certainty under the coast.  However, this is not possible at the moment.  I also believe that return transit with a torpedo inventory of three torpedoes through the whole South Atlantic is appropriate.  
    17.13   Outgoing Radio Message 1558/14/453:  Successes and return transit report sent.  
           
           
Sun and Moon Data 13.03.43
Sun and Moon Data 14.03.43
 
- 38 -
 
           
           
           
    continued      
    14.03.43 South east Africa, northeast of Durban    
    17.29 KP 9582 Crash dive for aircraft detection 169 cm, volume 3.  
    20.00 KP 9586    
    20.05   Surfaced.  
    20.11 KP 9586 Crash dive for aircraft detection as above.  
        Belief:  that my position has been exactly fixed.  
           
    15.03.43 South east Africa, east of Durban    
    00.00 KP 9589    
    00.50   Surfaced.  
    01.00 KP 9823 Crash dive for aircraft detection as above.  
    02.36   Surfaced.  
    03.10 KP 9823 Patrol vessel in sight bearing 250°T, target angle 0° and high speed.  Ran off at AK 30° off [his bearing] on courses 270 or 210°, in order to generate target angle.  Distance becomes about 4000 meters, patrol vessel constantly remains sharp [small target angle] and comes on strongly puffing away.  
    03.30 KP 9823 Patrol vessel suddenly develops target angle and has apparently lost the boat, no air detection, no sea detection.  Run further off on course 200°.  Shortly before morning twilight I attempt to put the patrol vessel below the horizon so I won't have to dive again.  Battery is half empty and the boat must get away from this position.  
    03.40 KP 9823 Second shadow in sight bearing 180°T.  Details not distinguished.  Initially held as a destroyer, because the shadow is very long.  Due to morning twilight no further running off is possible, therefore dived just in time.  
    04.00 KP 9826 Dived, immediately went to periscope depth.  Only a smoke cloud can still be seen of the patrol vessel.  The second shadow developed as a steamer, course 300°, estimated at 4-5000 GRT.  No attack possible, because broad target angle, range = 5000 meters.  Pursuit not promising due to day air, because the boat was detected.  
    05.07 KP 9826 Steamer out of sight bearing 300°T.  Patrol vessel and steamer do not belong together in my opinion, in addition the distance between them is too great.  Probably a stationary patrol.  
    08.00 KP 9829    
           
Sun and Moon Data 14.03.43
Sun and Moon Data 15.03.43
 
- 39 -
 
           
           
           
    continued      
    15.03.43 South east Africa, east of Durban    
    12.00 KP 9861 Day's run 81.5 nm.  
      φ = 30° 30' S    
      λ = 35° 46' E    
      NEbyN 2, Sea 1, Vis. 8 nm    
    16.00 KP 9864    
    17.20 Bright moon Surfaced.  
    18.33 KP 9883 Steamer with destroyer or patrol vessel in sight bearing 180°T.  While maneuvering ahead determined that enemy speed was 17 knots or more.  
    20.00 KP 9888 Destroyer was only seen briefly, apparently a stationary patrol.  Bearing of the steamer shifts ahead.  I attempt to get ahead by the course changes during his zig zags, steamer was small anyway.  Type and size not exactly determined in the moonlight.  Course 300°.  
    21.00   Pursuit broken off.  
    21.31 KP 9875 Steamer out of sight bearing 300°T.  
        Intend to operate on departing SE traffic on crossing courses.  
           
    16.03.43 South east Africa, southeast of Durban    
    00.00 KZ 3136    
    04.00 KZ 3156    
    08.00 KZ 3179    
    12.00 KZ 2663 Day's run 167 nm.  
      φ = 32° 17' S    
      λ = 33° 46' E    
      N 2-3, Sea 2, Vis. 8 nm    
    16.00 KZ 2686 Main ballast and reserve fuel oil tank 2 and 7 converted to function as ballast tanks.  
    17.46 - 18.10   Test dive.  
    20.00 KZ 2918 No traffic, nothing of note.  
           
    17.03.43 Indian Ocean, southeast coast of Africa    
    00.00 KZ 2895    
    04.00 KZ 5222    
           
Sun and Moon Data 15.03.43
Sun and Moon Data 16.03.43
Sun and Moon Data 17.03.43
 
- 40 -
 
           
           
           
    continued      
    17.03.43 Indian Ocean, southeast coast of Africa    
    08.00 KZ 5215    
    12.00 KZ 5162 Day's run 170 nm.  
      φ = 33° 59' S    
      λ = 31° 12.5' E    
      SE 3, Sea 3, Vis. 8 nm    
    16.00 KZ 5154    
    20.00 KZ 4368 No traffic, nothing of note.  
           
    18.03.43 Indian Ocean, south coast of Africa    
    00.00 KZ 4384 Course set for the south edge of the Agulhas Bank.  
    04.00 KZ 4299    
    06.00   Dived, proceeded submerged by day.  
    12.00 KZ 4525 Day's run 148 nm.  
      φ = 34° 47' S    
      λ = 28° 22.5' E    
      ENE 5, Sea 3, Vis. 6-8 nm    
    16.00 KZ 4518    
    17.45   Surfaced.  
    20.00 KZ 4467 No traffic, nothing of note.  
           
    19.03.43 Indian Ocean, south coast of Africa    
    00.00 KZ 4478    
    04.00 KY 6934    
    05.00   Dived.  
    08.00 KY 6924    
    12.00 KY 6918 Day's run 143 nm.  
      φ = 35° 43' S    
      λ = 25° 40' E    
      ENE 6, Sea 4, Vis. 6-8 nm    
    16.00 KY 6863    
    17.57   Surfaced.  Heavily increasing Sea state from astern forces course change from 250 to 280°.  
    20.00 KY 6852 No traffic.  
           
Sun and Moon Data 17.03.43
Sun and Moon Data 18.03.43
Sun and Moon Data 19.03.43
 
- 41 -
 
           
           
           
           
    20.03.43 Indian Ocean, south coast of Africa    
    00.00 KY 6762    
    04.00 KY 6746    
    04.52   Dived due to poor visibility, Sea state.  
    08.00 KY 5993    
    12.00 KY 5997 Day's run 155.5 nm.  
      φ = 36° 16.5' S    
      λ = 22° 48' E    
      NEbyE 8, Sea 7, Vis. 4 nm    
    16.00 KY 8325    
    17.35   Surfaced.  
    20.00 GR 9668 No traffic, nothing of note.  
           
    21.03.43 Indian Ocean, south edge of the Agulhas Bank    
    00.00 GR 9657    
    04.00 GR 9569    
    06.02   Dived.  
    06.04   Surfaced due to unexplained stern heaviness, boat cannot be held.  Immediate subsequent diving attempt also unsuccessful.   Everything is thoroughly checked.  A cause cannot be determined.  
    07.12   Dived, everything is in order, nothing determined.  Because the main ballast and reserve fuel oil tanks are blown daily and also were blown this morning before diving, the stern heaviness during the first dive is inexplicable.  Nevertheless it is suspected that there was residual air in main ballast and reserve fuel oil tank 7.  
    08.00 GR 9555    
    12.00 GR 9543 Day's run 138 nm.  
      φ = 36° 41.5' S    
      λ = 20° 7.5' E    
      WNW 5, Sea 4, Vis. 5-8 nm    
    16.00 GR 9518    
    17.58   Surfaced.  
    18.23   Normal diving maneuver to check everything one more time, nothing determined.  Also believe as above.  
    18.30   Surfaced.  
    20.00 GR 9514 No traffic.  
           
           
Sun and Moon Data 20.03.43
Sun and Moon Data 21.03.43
 
- 42 -
 
           
           
           
           
    22.03.43 South Atlantic south of Cape Town    
    00.00 GR 9185    
    04.00 GR 8366    
    06.00   Dived, dived by day with hourly periscope sweeps.  
    08.00 GR 8325    
    12.00 GR 8313 Day's run 142 nm.  
      φ = 35° 27' S New course 310°.  
      λ = 17° 40' E    
      SE 5, Sea 3-4, Vis. 8 nm    
    16.00 GR 5978    
    18.00   Surfaced.  
    20.00 GR 5892    
           
    23.03.43 South Atlantic west of Cape Town    
    00.00 GR 5818    
    04.00 GR 5489    
    07.00   Dived.  
    08.00 GR 5444    
    12.00 GR 4663 Day's run 170 nm.  
      φ = 33° 59' S    
      λ = 14° 43' E    
      SSW 5, Sea 3-4, Vis. 6-8 nm    
    16.00 GR 4637    
    20.00 GR 4378 Surfaced.  
        "Wiebe" reports sinking in GG 7395, course 290°.  
        Intention:  xx nm from the coast initially on course 320°, then 340° operating on observed coastal traffic.  
           
    24.03.43 South Atlantic southeast of Cape Town    
    00.00 GR 4264    
    04.00 GR 4227    
    08.00 GR 1877    
    12.00 GR 1759 Day's run 167 nm.  
      φ = 32° 26' S    
      λ = 12° 03' E    
      S 1-2, Sea 2, Vis. 8 nm    
    16.00 GR 1719 No traffic, nothing of note.  
    20.00 GR 3696 [typo actually GQ]    
           
Sun and Moon Data 22.03.43
Sun and Moon Data 23.03.43
Sun and Moon Data 24.03.43
 
- 43 -
 
           
           
           
           
    25.03.43 South Atlantic west of South Africa    
    00.00 GQ 3652    
    04.00 GQ 3379    
    06.19 - 06.55   Test dive.  
    08.00 GQ 3269    
    10.00 GQ 3261 Masthead sighted bearing 241°T, steamer, course 85°, slow speed.  Yellow smoke stack with black cap distinguished.  
    11.32   After maneuvering ahead, dived.  
    12.00 GQ 3262 Day's run 178 nm.  
      φ = 30° 22' S    
      λ = 09° 57' E    
      NNW 1, Sea 0-1, Vis. 8 nm Enemy steers a straight course, was recognized as a neutral.  Argentinean with flag and writing on the hull "PARANA Buenos Aires".  From range = 2200 meters estimated size 3500 GRT.  
        (actual size 3286 GRT).  
    12.32 GQ 3262 Attack broken off.  Enemy speed 7-8 knots.  
    13.40 GQ 3262 Surfaced, steamer is out of sight.  
    16.00 GQ 3238    
    19.09   Incoming Radio Message 1814/25/443:  "Seehund boats".  Operate as long as possible in southern area.  Supply in about DG southern third possible.  
    20.00 GH 8997 Intentions:  On course 0° continue to operate up to the latitude of Swakopmund.  With favorable moon there to the coast, along the same to the south up to Port Nolloth.  If up to then nothing is seen, return transit is necessary.  Still have 40 day's provisions, 115 cbm.  
           
    26.03.43 South Atlantic southwest coast of Africa    
    00.00 GH 8946    
    04.00 GH 8832    
    08.00 GH 8555    
    12.00 GH 8288 Day's run 155.5 nm.  
      φ = 28° 10' S    
      λ = 08° 31.5' E    
      E 2, Sea 1-2, Vis. 8 nm    
    16.00 GH 8228    
    20.00 GH 5885 No traffic, nothing of note.  
           
           
Sun and Moon Data 25.03.43
Sun and Moon Data 26.03.43
 
- 44 -
 
           
           
           
           
    27.03.43 South Atlantic southwest coast of Africa    
    00.00 GH 5882    
    04.00 GH 5858    
    06.33 - 06.54   Test dive.  
    08.00 GH 5852 Ran on course 70° to Conception Bay to detect coastal traffic there, then advance to the south.  If outbound Cape Town traffic leaves here or further south, will move back and forth in position.  
    12.00 GH 5582 Day's run 120 nm.  
      φ = 26° 12' S    
      λ = 8° 27' E    
      SSE 4, Sea 3, Vis. 8 nm    
    15.45 - 15.53   Crash dive for training.  
    16.00 GH 5525    
    20.00 GH 5522 No traffic, nothing of note.  
           
    28.03.43 South Atlantic southwest coast of Africa    
    00.00 GH 5521    
    04.00 GH 5279    
    08.00 GH 5283    
    12.00 GH 5357 Day's run 101 nm.  
      φ = 25° 05' S    
      λ = 9° 08' E    
      SE 4, Sea 3-4, Vis. 8 nm    
    16.00 GH 5363    
    20.00 GH 6126 No traffic, nothing of note.  
           
    29.03.43 South Atlantic southwest coast of Africa    
    00.00 GH 6213    
    04.00 GH 3897 Stopped on the 200-meter line.  
      Fog, Vis. bad    
    07.30   Dived, day advance to the coast on course 90° up to the 80-meter line, then on course 180° and half hourly all around sweeps.  
    08.00 GH 3984 Land appears, but position fix is not possible.  However, coastal traffic can be detected in moderate visibility.  
    12.00 GH 3985 Day's run 163.5 nm.  
      φ = 24° 26' S    
      λ = 12° 04' E    
      SEbyS 4-5, Sea 3-4, Vis. 4-6 nm    
           
Sun and Moon Data 27.03.43
Sun and Moon Data 28.03.43
Sun and Moon Data 29.03.43
 
- 45 -
 
           
           
           
    continued      
    29.03.43 South Atlantic southwest coast of Africa    
    16.00 GH 3991    
    19.32   Surfaced.  
    20.00 GJ 1771 No traffic, nothing of note.  
           
    30.03.43 South Atlantic southwest coast of Africa    
    00.00 GJ 1764 Also at night a lot of fog, heavily changing visibility.  
    04.00 GJ 1852    
    06.45   Dived.  
    08.00 GJ 1839    
    12.00 GJ 1941 Day's run 128 nm.  
      φ = 24° 02' S    
      λ = 14° 19.5' E    
      ESE 2, Sea 2, Vis. changing 2-4 nm, fog    
    16.00 GJ 1944    
    19.33   Surfaced.  
    20.00 GJ 1947    
           
    31.03.43 South Atlantic southwest coast of Africa    
    00.00 GJ 1947    
    04.00 GJ 1947    
    06.53   Dived.  
    08.00 GJ 1899    
    12.00 GJ 4233 Day's run 43 nm.  
      φ = 24° 40' S    
      λ = 14° 15' E    
      SW 1, Sea 0-1, Vis. 1000-3000 meters    
    16.00 GJ 4236    
    20.00 GJ 4261 Surfaced.  
        No traffic, nothing of note.  
           
    01.04.43 South Atlantic southwest coast of Africa    
    00.00 GJ 4299 Advance along the coast to the south.  
    04.00 GJ 4563    
    07.00   Dived, sound range is greater than visibility, which alternates heavily.  
           
Sun and Moon Data 29.03.43
Sun and Moon Data 30.03.43
Sun and Moon Data 31.03.43
Sun and Moon Data 01.04.43
 
- 46 -
 
           
           
           
    continued      
    01.04.43 South Atlantic southwest coast of Africa    
    08.00 GJ 4593    
    12.00 GJ 4672 Day's run 101.5 nm.  
      φ = 26° 12' S    
      λ = 14° 27.5' E    
      SSE 3, Sea 3, Vis. 2 nm    
    16.00 GJ 4681    
    19.26   Surfaced.  
    20.00 GJ 4685 No traffic, nothing of note.  
           
    02.04.43 South Atlantic southwest coast of Africa    
    00.00 GJ 4955 Course set to the coast at Panther Head.  Will move back and forth in position here.  
    04.00 GJ 7325    
    07.08   Dived.  
    08.00 GJ 7381    
    12.00 GJ 7394 Day's run 133 nm.  
      φ = 28° 04' S    
      λ = 14° 56.5' E    
      SbyE 3, Sea 3, Vis. 1000-5000 meters, fog    
    16.00 GJ 7399    
    20.00 GJ 8415 Surfaced.  
        No traffic, nothing of note.  
           
    03.04.43 South Atlantic southwest coast of Africa    
    00.00 GJ 8422 Positioned between land and the 100-meter line, night heavily changing visibility with a lot of fog.  Day initially clearing at noon thereafter changing visibility with fog.  If there is no visibility improvement, I intend to leave this area, because here observation of traffic is not possible and weather improvement is not expected to the south.  
    04.00 GJ 8422    
    07.12   Dived.  
    08.00 GJ 8423    
    12.00 GJ 8432 Day's run 65 nm.  
      φ = 28° 16' S    
      λ = 15° 52.5' E    
      SSE 2, Sea 1, Vis. 5-10 nm    
           
Sun and Moon Data 01.04.43
Sun and Moon Data 02.04.43
Sun and Moon Data 02.04.43
 
- 47 -
 
           
           
           
    continued      
    03.04.43 South Atlantic southwest coast of Africa    
    16.00 GJ 8436    
    19.26   Surfaced.  
    20.00 GJ 8439    
        No traffic, nothing of note.  
           
    04.04.43 South Atlantic southwest coast of Africa    
    00.00 GJ 8437 Set off to the west to get out of the fog area, resumed return transit on course 320°.  
    04.00 GJ 8414    
    07.00   Dived.  
    08.00 GJ 7625    
    12.00 GJ 7616 Day's run 92.5 nm.  
      φ = 28° 21.5' S    
      λ = 14° 31.5' E    
      SbyE 2-3, Sea 2, Vis. 5 nm    
    16.00 GJ 7614    
    19.32   Surfaced.  
    20.00 GJ 7535 No traffic, nothing of note.  
           
    05.04.43 South Atlantic southwest coast of Africa    
    00.00 GJ 7272    
    04.00 GJ 7153    
    08.00 GJ 7116    
    12.00 GH 6989 Day's run 142 nm.  
      φ = 27° 14' S    
      λ = 12° 03' E    
      SE 2, Sea 2, Vis. 6 nm    
    16.00 GH 6869    
    16.45 - 17.07   Test dive.  
    20.00 GH 6843    
    21.17   Outgoing Radio Message 1938/5/DAN:  Reported return transit and situation.  81 cbm, 4 weeks' provisions.  
           
    06.04.43 South Atlantic southwest coast of Africa    
    00.00 GH 6731 Course 320°.  
    04.00 GH 6475    
    08.00 GH 5656    
           
Sun and Moon Data 03.04.43
Sun and Moon Data 04.04.43
Sun and Moon Data 05.04.43
Sun and Moon Data 06.04.43
 
- 48 -
 
           
           
           
    continued      
    06.04.43 South Atlantic west of South Africa    
    12.00 GH 5614 Day's run 195.5 nm.  
      φ = 25° 41.5' S    
      λ = 8° 55' E    
      SSE 3-4, Sea 3, Vis. 8 nm    
    16.00 GH 5288    
    20.00 GH 5169 No traffic, nothing of note.  
           
    07.04.43 South Atlantic west of South Africa    
    00.00 GH 5125    
    04.00 GH 2771    
    08.00 GH 1929    
    09.49 - 10.37   Test dive.  
    12.00 GH 1675 Day's run 194 nm.  
      φ = 23° 30' S    
      λ = 6° 18' E    
      SEbyS 3-4, Sea 2-3, Vis. 8 nm    
    16.00 GH 1561    
    20.00 GH 1275 No traffic, nothing of note.  
           
    08.04.43 South Atlantic west of South Africa    
    00.00 GH 1162    
    04.00 GH 1122    
    08.00 FV 8966    
    12.00 FV 8688 Day's run 198 nm.  
      φ = 21° 2.5' S    
      λ = 3° 57.5' E    
      SEbyE 2, Sea 1, Vis. 10-12 nm    
    16.00 FV 8644    
    20.00 FV 8523 No traffic, nothing of note.  
           
    09.04.43 South Atlantic southeast of St. Helena    
    00.00 FV 8227    
    04.00 FV 8134    
    08.00 FV 5749    
           
           
Sun and Moon Data 06.04.43
Sun and Moon Data 07.04.43
Sun and Moon Data 08.04.43
Sun and Moon Data 09.04.43
 
- 49 -
 
           
           
           
    continued      
    09.04.43 South Atlantic southeast of St. Helena    
    12.00 FV 4935 Day's run 205 nm.  
      φ = 18° 27' S Course set for FE 60.  
      λ = 1° 31' E    
      SEbyS 3, Sea 2, Vis. 8 nm    
    14.19 - 15.05   Test dive.  
    16.00 FV 4681    
    20.00 FV 4617 No traffic, nothing of note.  
           
    10.04.43 South Atlantic east of St. Helena    
    00.00 FV 4285    
    04.00 FV 4242    
    08.00 FV 1794    
    12.00 FV 1743 Day's run 195.5 nm.  
      φ = 15° 59' S    
      λ = 0° 40' W    
      ESE 2-3, Sea 1-2, Vis. 8 nm    
    16.00 FU 3699    
    20.00 FU 3655 No traffic, nothing of note.  
           
    11.04.43 South Atlantic northeast of St. Helena    
    00.00 FU 3611    
    04.00 FU 3264    
    08.00 - 08.24 FU 3213 Test dive.  
    12.00 FN 9765 Day's run 202.5 nm.  
      φ = 13° 26' S    
      λ = 2° 51.5' E    
      SEbyE 3, Sea 2, Vis. 10 nm    
    16.00 FN 9721    
    20.00 FN 9447 No traffic, nothing of note.  
           
    12.04.43 South Atlantic Ascension - St. Helena    
    00.00 FN 8637    
    04.00 FN 8376    
    08.00 FN 8263    
           
           
Sun and Moon Data 09.04.43
Sun and Moon Data 10.04.43
Sun and Moon Data 11.04.43
Sun and Moon Data 12.04.43
 
- 50 -
 
           
           
           
    continued      
    12.04.43 South Atlantic Ascension - St. Helena    
    12.00 FN 5885 Day's run 190 nm.  
      φ = 10° 58' S    
      λ = 5° 2.5' W    
      E 3, Sea 2, Vis. 8-10 nm    
    16.00 FN 5842    
    20.00 FN 5731 No traffic, nothing of note.  
           
    13.04.43 South Atlantic east of Ascension    
    00.00 FN 5446    
    04.00 FN 4633    
    08.00 FN 4355    
    10.29 - 11.38   Crash dive for training.  
    12.00 FN 4311 Day's run 200 nm.  
      φ = 8° 30' S    
      λ = 7° 13' W    
      SEbyE 3-4, Sea 2-3, Vis. 8 nm    
    16.00 FN 1867    
    20.00 FN 1816 No traffic, nothing of note.  
           
    14.04.43 South Atlantic northeast of Ascension    
    00.00 FN 1493    
    04.00 FN 1428    
    08.00 FN 1177    
    12.00 FM 3353 Day's run 195 nm.  
      φ = 6° 05' S    
      λ = 9° 25' W    
      ESE 4, Sea 3, Vis. 8-10 nm    
    16.00 FF 7979    
    20.00 FF 7864 No traffic, nothing of note.  
           
    15.04.43 South Atlantic north of Ascension    
    00.00 FF 7821    
    04.00 FF 7469    
    08.00 FF 7425    
           
           
Sun and Moon Data 12.04.43
Sun and Moon Data 13.04.43
Sun and Moon Data 14.04.43
Sun and Moon Data 15.04.43
 
- 51 -
 
           
           
           
    continued      
    15.04.43 South Atlantic north of Ascension    
    08.28 - 08.59   Crash dive for training.  
    12.00 FF 7174 Day's run 200 nm.  
      φ = 3° 45' S    
      λ = 11° 45' W    
      SEbyS 4-5, Sea 4, Vis. 8 nm    
    16.00 FE 9353    
    20.00 FE 9238 No traffic, nothing of note.  
           
    16.04.43 South Atlantic Equator    
    00.00 FE 6882    
    04.00 FE 6817    
    08.00 FE 6483    
    12.00 FE 6419 Day's run 215 nm.  
      φ = 1° 24' S    
      λ = 14° 20' W    
      SEbyS 2, Sea 1, Vis. 8 nm    
    16.00 FE 5392    
    20.00 FE 5327 No traffic, nothing of note.  
           
    17.04.43 North Atlantic Equator    
    00.00 FE 2947    
    04.00 FE 2826    
    08.00 FE 2545    
    12.00 FE 2435 Day's run 208.5 nm.  
      φ = 1° 19' N    
      λ = 16° 29' W    
      SE 2-3, Sea 1-2, Vis. 8-10 nm    
    16.00 FE 2158    
    16.35 - 17.08   Crash dive for training.  
    20.00 FE 2112 No traffic, nothing of note.  
           
    18.04.43 North Atlantic west coast of Africa    
    00.00 ET 7968    
           
           
Sun and Moon Data 15.04.43
Sun and Moon Data 16.04.43
Sun and Moon Data 17.04.43
Sun and Moon Data 18.04.43
 
- 52 -
 
           
           
           
    continued      
    18.04.43 North Atlantic west coast of Africa    
    00.20   Incoming Radio Message 2209/17/433:  3) Supply for       "L a s s e n" and "U-509" depending on the replacement for "Newmann" possibly in early May.  
    04.00 ET 7922 Only still have encryption table through April, therefore Radio Message necessary.  
    08.00 ET 7644    
    12.00 ET 7297 Day's run 209 nm.  
      φ = 4° 12' N    
      λ = 18° 25' W    
      NWbyN 2, Sea 1, Vis. 2-8 nm    
    16.00 ET 7254    
    19.17   Outgoing Short Signal:  Only have encryption documents through April.  My position is ET 40.  
                                                                   "U-160"  
    20.00 ET 4799 No traffic.  
           
    19.04.43 North Atlantic west coast of Africa    
    00.00 ET 4753    
    02.15   Outgoing Short Signal:  Still have 50-60 cbm fuel oil, require 15 cbm fuel oil.  
                                                                   "U-160"  
    04.00 ET 4484    
    08.00 ET 4417    
    08.56 - 09.51   Test dive.  
    12.00 ES 6386 Day's run 202 nm.  
      φ = 7° 3.5' N    
      λ = 20° 12' W    
      N 3-4, Sea 1-2, Vis. 10 nm    
    13.42 ES 6382 U-boat in sight bearing 295°T, "U-177".  
    14.04   After exchanging recognition signals short situation exchange with "Gysae", Took over recognition signals up to 6 May, then continued transit.  
    15.05 ES 6382 "U-177" out of sight.  
    16.00 ES 6346    
    18.25   Incoming Radio Message 1748/19/315:  Arrival of             "L a s s e n" in DG 8555 is expected from 28 April.  In the named square "Newmann" give second copy of the encryption documents for May or copy the same, if still possible also fuel for most economical return transit, as well as provisions and cables, "L a s s e n" report after setting off if further supply is required.  
    20.00 ES 6311 No traffic.  
           
Sun and Moon Data 18.04.43
Sun and Moon Data 19.04.43
 
- 53 -
 
           
           
           
           
    20.04.43 North Atlantic south of Cape Verde    
    00.00 ES 3856    
    04.00 ES 3821    
    08.00 ES 3571    
    12.00 ES 3431 Day's run 180.5 nm.  
      φ = 9° 33' N    
      λ = 21° 57' W    
      NNE 4, Sea 3, Vis. 10 nm    
    16.00 ES 3146    
    20.00 EJ 8999    
    20.12 EJ 8999 Vessel sighted bearing 120°T, appearance like submarine conning tower with two thin masts.  I run with, enemy speed 16 knots.   Because no smoke stack is seen and the type of vessel cannot be made out on detail, still regarded as a submarine.  
    21.22   Dived, to make out details submerged, course 250°.  Holding contact on the surface no longer possible due to the bright horizon, therefore intend to pursue after twilight if necessary.  Through the periscope the vessel is recognized as a steamer without smoke stack with high bridge amidships, otherwise a completely flat upper deck.  
    22.12 Full moon Surfaced, pursued.  
        Closed the steamer from astern.  Steamer steers base course 270°, zig zags however about three general courses:  250°, 270°, 300°.  These change about hourly, while every 5-10 minutes zig zagging 30° around these general courses.  In the full moon night there is no possibility of attack on the surface.  Because a long-range shot is hopeless because of the high speed and zig zags.  I approach further maneuvering ahead which goes very slowly in spite of keeping up the basic course 270°, not near enough to the enemy so that the type of ship can be determined.  
           
    21.04.43 North Atlantic south of Cape Verde    
    00.00 ES 2327 I intend a submerged moon attack in spite of previous bad experiences with fast ships with zig zags, because the difficult maneuver ahead would be in vain if there were a change in the general course by day.  
    04.00 ES 2242  
    06.23   Dived, positioned ahead on base course 270°, enemy course at the time of diving 280°.  
           
Sun and Moon Data 20.04.43
Sun and Moon Data 21.04.43
 
- 54 -
 
           
           
           
    continued      
    21.04.43 North Atlantic south of Cape Verde    
    06.53 ES 2146 Shot from tube IV:  G 7e, depth 2 meters, target speed = 16 knots, target angle = 62°, range = 2000 meters.  Miss!  
    06.57 ES 2146 Shot from tube VI:  G 7a, depth 2 meters, target speed = 16 knots, target angle = 80°, range = 2000 meters.  Miss!  
        Intended two-fan with bow tubes spoiled due to failure of tube III shortly before the shot. (Gyro angle setting disengaged automatically)  Range target angle estimate with this attack very difficult and uncertain. At the shot the enemy filled approximately 3/4 of the periscope optic at large magnification.  Therefore, suspect the distance was over estimated.  Refrained from another pursuit by day, because with 1 knot speed surplus can only get ahead on the enemy's course by evening.  At night, however, again because of the full moon no night attack.  Still have 1 Ato.  
        Steamer comes slowly out of sight.  Even now submerged the actual type and approximate size are not distinguished.  Estimated 5000 GRT.  
    08.00 ES 2143    
    08.30   Surfaced.  
    12.00 EJ 8775 Day's run 282 nm.  
      φ = 10° 42.5' N    
      λ = 25° 7.5' W    
      NEbyN 3-4, Sea 2-3, Vis. 8 nm    
    16.00 EJ 8715    
    20.00 EJ 8448    
    20.37 - 20.46   Test dive.  
    22.00   Outgoing Radio Message 2106/21/DAN:  21 April hunt at AK, double miss on fast freighter in ES 2146, 270°.  Still 40 cbm, 1 Ato, EJ 8416 naval squares.  From "L a s s e n".  
      This attack has again shown that submerged moon attack on a fast-moving zig zagging vessel is very difficult.  Therefore, I believe, from my previous experiences (a total of 6 attacks) it is correct to strive for a day attack with enemy speed over 12 knots with zig zags in all circumstances.  I will continue to attack ships on straight course submerged.  
           
    22.04.43 North Atlantic Cape Verde Islands    
    00.00 EJ 8412    
    04.00 EJ 8144    
           
Sun and Moon Data 21.04.43
Sun and Moon Data 22.04.43
 
- 55 -
 
           
           
           
    continued      
    22.04.43 North Atlantic Cape Verde Islands    
    08.00 EJ 8111    
    12.00 EJ 5741 Day's run 182 nm.  
      φ = 13° 45' N    
      λ = 25° 14' W    
      NEbyN 3-4, Sea 2-3, Vis. 8-10 nm    
    16.00 EJ 4699    
    20.00 EJ 4662 No traffic, nothing of note.  
           
    23.04.43 North Atlantic Cape Verde Islands    
    00.00 EJ 4398    
    04.00 EJ 4361    
    08.00 EJ 1989    
    12.00 EJ 1928 Day's run 172 nm.  
      φ = 16° 34' N    
      λ = 25° 46.5' W    
      NE 4, Sea 3, Vis. 8 nm    
    16.00 EJ 1682    
    20.00 EJ 1628 No traffic, nothing of note.  
           
    24.04.43 North Atlantic north of the Cape Verde Islands    
    00.00 EJ 1385    
    04.00 EJ 1329    
    08.00 DT 7986    
    08.54 - 10.19   Test dive, forward diving plane jams down 5 and can only be put downward, but not more upwards than 5 down. Further details see KTB Maschine.  Determination of the cause must take place within main ballast tank 8, because from within the pressure hull no damage can be determined.  
    12.00 DT 7956 Day's run 151 nm.  
      φ = 19° 04' N    
      λ = 25° 38.5' W    
      NE 3-4, Sea 3, Vis. 8-10 nm    
    16.00 DT 4689    
    20.00 DT 7629 No traffic.  
           
           
Sun and Moon Data 22.04.43
Sun and Moon Data 23.04.43
Sun and Moon Data 24.04.43
 
- 56 -
 
           
           
           
           
    25.04.43 North Atlantic west of North Africa    
    00.00 DT 7383    
    04.00 DT 7326    
    08.00 DT 4959    
    12.00 DT 4931 Day's run 182.5 nm.  
      φ = 22° 07' N    
      λ = 25° 35' W    
      NE 3-4, Sea 2-3, Vis. 8 nm    
    16.00 DT 4664    
    20.00 DT 4395    
    20.38   Incoming Radio Message 1958/25/383:  "U-509" at 19.46 hours was in naval square DT 7514 and sighted a convoy on a northerly course, speed 8-10 knots (9-13 knots).  
    21.44   Incoming Radio Message:  2115/25/386:  From "U-509".  Convoy position 20.00 hours naval square DT 7275 in rain squalls major general course change contact lost, search continues to the east.  
        Intention:  Previous "Witte" message gives no indication of the general course and speed.  My distance to the last sighting amounts to 190 nm north. Therefore, operate immediately, as long as contact is regained.  Advance to the south at highest speed, however, is not appropriate, as long as no other report comes. Remain lying overnight stopped to be positioned more favorably with supposed northerly course.  
           
    26.04.43 North Atlantic west of North Africa    
    00.00 DT 4365    
    04.00 DT 4364    
    08.00 DT 4353 Continue transit to the supply place, because "Witte" has not reported contact.  
        Forward diving plane is completely uncoupled and with stopped boat hits hard on the bracket.  Eventual repair from main ballast tank 8 is not possible at the moment because of rough sea.  Depth control at periscope depth greatly complicated.  
    08.53 - 09.36   Test dive.  
    12.00 DT 4324 Day's run 110.5 nm.  
      φ = 23° 52.5' N    
      λ = 25° 52.5' W    
      NEbyE 3-4, Sea 3, Vis. 6-8 nm    
    16.00 DT 1947

Tube III leaks heavily, drainage is no longer possible despite closed outer tube door with full outboard pressure on the fittings.

 
    20.00 DT 1835 No traffic.  
           
           
Sun and Moon Data 25.04.43
Sun and Moon Data 26.04.43
 
- 57 -
 
           
           
           
           
    27.04.43 North Atlantic west of North Africa    
    00.00 DT 1585    
    04.00 DT 1542    
    08.00 DT 1432    
    08.53 - 09.38   Test dive.  
    12.00 DT 1159 Day's run 165 nm.  
      φ = 26° 10' N    
      λ = 27° 31.5' W    
      NE 4, Sea 3-4, Vis. 6-8 nm    
    16.00 DT 1116    
    20.00 DG 8972 No traffic, nothing of note.  
           
    28.04.43      
    00.00 DG 8941    
    04.00 DG 8598    
    08.00 DG 8555    
    10.51 DG 8555 "U-117" and "U-509" in sight bearing 235°T.  
    12.00 DG 8555 Day's run 142.5 nm.  
      φ = 28° 00' N    
      λ = 28° 58' W    
      ENE 3, Sea 2, Vis. 6-8 nm    
    12.30   Begin supply.  In starboard echelon without tow connection.  Speed 3 knots against the sea.  
    14.30   Connection released.  16 cbm taken over, therefore total inventory 40 cbm.  Provisions for 7 days and cipher material for May.  
    14.48 - 15.20   Test dive.  
    16.00 DG 8555    
    18.01   Left supply place after supply ended.  Continued return transit with "U-509" on diverging courses.  
    18.21 DG 8555 "U-117" out of sight bearing 210°T.  
    19.16 DG 8555 "U-509" out of sight.  
    20.00 DG 8552    
    23.43 DG 8298 Neutral steamer in sight bearing 0°T, strongly illuminated, course 220-240°.  Because the supply place will be passed during the night, no report made.  
           
Sun and Moon Data 27.04.43
Sun and Moon Data 28.04.43
 
- 58 -
 
           
           
           
           
    30.04.43 North Atlantic west of Madeira    
    00.00 DG 6446    
    02.21   Outgoing Radio Message 0047/30/DAN:  Supply report sent.  
    04.00 DG 6425    
    08.00 DG 6191    
    10.38 - 11.26   Test dive.  
    12.00 DG 6163 Day's run 153 nm.  
      φ = 31° 44' N    
      λ = 25° 57' W    
      NE 4-5, Sea 3-4, Vis. 8 nm    
    16.00 DG 3878 After detaching the manhole cover for main ballast tank 8 the linkage of the forward diving plane was inspected and the following was determined:  
        The connecting clutch - linkage - shaft is broken, so that intended repair by replacing the pin is not possible.  
        Crash dive condition:  Extended diving time, sometimes 1 minute to 12 meters, complicates depth control at periscope depth, in rough seas sometimes impossibly. Otherwise normal.  
    20.00 DG 3855    
           
    01.05.43 North Atlantic southeast of the Azores    
    00.00 DG 3853    
    00.23   Outgoing Radio Message 2317/30/DAN:  Report on damage sent.   
    04.00 DG 3598 Intend to proceed to the east close off the Spanish coast dived by day.  
    08.00 DG 3644    
    12.00 DG 3616 Day's run 144.5 nm.  
      φ = 33° 42.5' N    
      λ = 24° 22' W    
      NEbyN 4, Sea 3, Vis. 7 nm    
    16.00 DG 3385    
    20.00 DG 3364 No traffic.  
           
    02.05.43 North Atlantic southeast of the Azores    
    00.00 DG 3336    
    04.00 CF 7975    
    08.00 CF 7955    
    08.15 - 08.45   Test dive.  
           
Sun and Moon Data 30.04.43
Sun and Moon Data 01.05.43
Sun and Moon Data 02.05.43
 
- 59 -
 
           
           
           
    continued      
    02.05.43 North Atlantic southeast of the Azores    
    12.00 CF 7932 Day's run 144 nm.  
      φ = 35° 34' N    
      λ = 22° 32.5' W    
      NE 5-6, Sea 4-5, Vis. 6 nm    
    16.00 CF 8471    
    20.00 CF 8443 No traffic, nothing of note.  
           
    03.05.43 North Atlantic east of the Azores    
    00.00 CF 8423    
    04.00 CF 8192    
    08.00 CF 8242    
    12.00 CF 8221 Day's run 148 nm.  
      φ = 37° 27' N    
      λ = 20° 34' W    
      NE 6, Sea 4-5, Vis. 6-8 nm    
    16.00 CF 5891    
    20.00 CF 5863 No traffic, nothing of note.  
           
    04.05.43 North Atlantic east of the Azores    
    00.00 CF 5679    
    04.00 CF 5658    
    07.55   Test dive.  
    08.00 CF 5662    
    08.45   Surfaced.  
    12.00 CF 5398 Day's run 139 nm.  
      φ = 39° 17.5' N    
      λ = 18° 57.5' W    
      NE 6, Sea 5, Vis. 8 nm    
    16.00 CF 5365    
    20.00 CF 6142 No traffic, nothing of note.  
           
    05.05.43 North Atlantic west of Spain    
    00.00 CF 6128    
    04.00 CF 6132    
    08.00 CF 3875    
           
Sun and Moon Data 02.05.43
Sun and Moon Data 03.05.43
Sun and Moon Data 04.05.43
Sun and Moon Data 05.05.43
 
- 60 -
 
           
           
           
    continued      
    05.05.43 North Atlantic west of Spain    
    12.00 CF 3858 Day's run 133 nm.  
      φ = 40° 30' N    
      λ = 16° 51' W    
      NNE 5, Sea 4, Vis. 8 nm    
    12.02 CF 3858 Mastheads in sight bearing 45°T, destroyer with two smoke stacks and enclosed bridge recognized, easterly course, dived.  
        Because the boat cannot be safely held at periscope depth, no further observations are possible.  
    14.20   Surfaced.  
    14.24   Outgoing Short Signal:  12.00 hours enemy destroyer in sight square CF 3858.                             - U-160 -  
        (Group "Drossel" sighted a short time later warship formation consisting of a light cruiser and two destroyers, course SE, high speed in square CF 3989).  
    16.00 CF 3865    
    20.00 CF 3919    
           
    06.05.43 North Atlantic southwest of Cape Finisterre    
    00.00 CF 3699    
    00.30 CF 3699 Detection on 168 cm horizontally polarized, dived, no attack.  
    02.05   Surfaced.  
    04.00 CG 1746    
    07.39   Dived to proceed submerged by day.  
    08.00 CG 1465    
    12.00 CG 1544 Day's run 151.5 nm.  
      φ = 41° 35' N    
      λ = 13° 47.5' W    
      NbyE 5-6, Sea 5, Vis. 6-8 nm    
    16.00 CG 1543    
    18.19   Surfaced.  
    20.00 CG 1529 No traffic.  
           
    07.05.43 North Atlantic west of Cape Finisterre    
    00.00 CG 1379    
    04.00 CG 2144    
    05.50 CG 2127 Detection as above, dived, no attack.  
    06.27   Surfaced.  
           
Sun and Moon Data 05.05.43
Sun and Moon Data 06.05.43
Sun and Moon Data 07.05.43
 
- 61 -
 
           
           
           
    continued      
    07.05.43 North Atlantic west of Cape Finisterre    
    07.18   Dived, proceeded submerged.  
    08.00 CG 2126    
    12.00 CG 2132 Day's run 164.5 nm.  
      φ = 42° 47' N    
      λ = 10° 34' W    
      NE 3-4, Sea 2, Vis. 5 nm    
    16.00 BF 7877    
    20.00 BF 7876    
    20.45   Surfaced.  
    23.20 BF A neutral sighted on coastal route bearing 105°T, course SW.  
    23.32 BF Cape Villano lighthouse bears 116°T.  
           
    08.05.43 Bay of Biscay    
    00.00 BF 7865    
    04.00 BF 7827 Navigation fix on coastal lighthouses (Sisargas and Ponta Lage).  
    06.37   Dived to proceed submerged by day.  
    08.00 BF 7931    
    12.00 BF 7698 Day's run 125 nm.  
      φ = 43° 50' N    
      λ = 8° 00' W    
      WbyS 6, Sea 5, Vis. 4-5 nm    
    16.00 BF 8479    
    20.00 BF 8479    
    22.30   Surfaced.  
    23.15 BF 5726 Navigation fix from coastal lighthouses (Ciprián, Ribadeo, Tapia).  
           
    09.05.43 Bay of Biscay    
    00.00 BF 8726    
    04.00 BF 8815    
    08.00 BF 8677    
    12.00 BF 8698 Day's run 157.5 nm.  
      φ = 43° 48.2' N    
      λ = 4° 20.7' W    
      W 8, Sea 7-8, Vis. 3-8 nm    
           
           
Sun and Moon Data 07.05.43
Sun and Moon Data 08.05.43
Sun and Moon Data 09.05.43
 
- 62 -
 
           
           
           
    continued      
    09.05.43 Bay of Biscay    
    13.40 BF 9479 Taken under air escort, 4 aircraft of model "Ju 88".  
    13.50 BF 9479 4 M-boats in sight bearing 90°T  
    14.20 BF 9487 Taken in convoy.  Transit on coastal route for Bordeaux.  
    16.00 BF 9732    
    20.00 BF 9823    
           
    10.05.43 Bay of Biscay    
    00.00 BF 9941    
    04.00 BF 9681    
    08.00 BF 9387    
    11.28 BF 9324 Taken under ground mine escort.  
    12.00 BF 9321 Day's run 268 nm.  
      φ = 45° 32.5 N About half an hour after being taken in convoy a mine detonation was brought about by the first Speerbrecher  
      λ = 1° 24' W  
      SE 2-3, Sea 2, Vis. 8-10 nm    
    15.15 BF 9331 Released from convoy.  
    19.30   Entered Bordeaux.  
           
      Special experiences from the Operations Area.  
           
      Behavior off the Main Harbor with Heavy Traffic:  
      Remain unseen at all costs until the first attack, this must be worthwhile because the continually used defense (land detection) begins to take effect and is associated with air and sea defense after first being detected and it becomes much more difficult to out maneuver.  
           
      Behavior of the Crew:  
      The crew grew to fully meet the demands of the patrol. The men showed verve and spirit in spite of the length of the patrol, performing especially well when recognizing and correcting errors and failures at all positions.  
           
      Duration of the patrol in days:  125  
           
      Total distance covered in nautical miles:  18,066.9  
           
     
          
 
 
      Signed     L   a   s   s   e    n
              Kptlt. and Kmdt.
 
Ob.-Lt. z, See and Administrative Officer i.V.  
 
           
Sun and Moon Data 09.05.43
Sun and Moon Data 10.05.43

 
 
     
 

                       Comments of the Befehlshabers der Unterseeboote

 
                         on the K.T.B. of "U-160" (Lassen) from 10.12.42-10.5.43.  
     
  A superbly executed patrol by the proven Kommandant marked by tactical skill, proper judgment, toughness and energy and attack spirit.  The Kommandant dealt remarkably well with the relatively untrained and not very heavy defense in the South African area, as well as the overall situation, with excellent adaptability and also on the basis of his previous experiences.  
     
 
Accredited Successes:    
     
1 steamer 6800 GRT Sunk
1 tanker 8000 GRT    "
1 freighter 6000 GRT    "
1 freighter 7000 GRT    "
1 freighter 5000 GRT    "
1 freighter 6000 GRT    "
1 freighter 8000 GRT    "
1 freighter 8000 GRT    "
1 freighter 6000 GRT    "
1 freighter 6000 GRT    "
 
     
  Total 10 ships = 66800 GRT sunk  
     
    For the Befehlshaber der Unterseeboote  
      - The Chief of Operations Department -  
                           
       
     
     
 


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