U-604 - 4th War Patrol

Translation by Jerry Mason with the help of Ken Dunn

Departed
Date
Arrived
Date
Days at Sea
Brest
8 February 1943
Brest
9 March 1943
30

 

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

Ships Attacked
Date
KTB Time
Position
Ship
Tons
Nationality
Convoy
23 Feb 43
03.15
47°21'N, 34°05'W
STOCKPORT
1,683
British
ON-166
     
 Total = 1,683
   
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.


 
 
           
           
           
           
           
           
           
           
           
           
           
           
                                            K  R  I  E  G  S  T  A  G  E  B  U  C  H  
              "  U  604  "  
           
           
           
           
              Kommandant:          Kapitänleutnant        H  ö  l  t  r  i  n  g    
           
           
           
           
           
           
           
           
                            Beginning:  1.1.  1943  
                                Ending:   9.3. 1943  
              
           
           
           
        © U-boat Archive 2014  - all rights reserved  
Click the flag to view the above page from the original German KTB
 
- 1 -
 
           
           
           
           
    01.01.43 -      
    07.02.43   Idle period Brest.  
    08.02.43      
    16.02   Put to sea from Brest.  
    16.17   Steered various courses by the instructions of the Kommandant.  
    09.02.43      
    01.44   Course 239°, LF.  
    02.57         "     320°,  "  
    03.15         "     300°,  "  
    03.45         "     270°,  "  
    04.00 BF 5492    
      SWbyW 8, Sea 5, overcast (rain), 1010 mb, +12°C, Vis. 6-12 nm, heavy marine phosphorescence    
    05.13 BF 5491 Dived to proceed submerged by day.  
    08.00 BF 5483    
      Weather absent because dived Day's run:  151.5 nm.  
    12.00 BF 5485    
      Weather absent because dived    
    16.00 BF 5484    
      Weather absent because dived    
    20.00 BF 5479    
      Weather absent because dived    
    21.21 BF 5478 Surfaced.  
    21.40   Course 240°, HF.  
    23.58 BF 4938 Crash dive (detection).  
           
    10.02.43      
    00.00 BF 4935    
      W 5, Sea 5, 1021 mb, +12°C, faint marine phosphorescence, overcast    
           
           
           
Sun and Moon Data 08.02.43
Sun and Moon Data 09.02.43
Sun and Moon Data 10.02.43
 
- 2 -
 
           
           
           
    continued      
    10.02.43      
    01.10 BF 4935 Surfaced.  Proceeding on the surface by night.  
    04.00 BF 4952    
      WbyN 3-4, Sea 3, overcast, 1026 mb, +14°C, medium marine phosphorescence    
    07.30 BF 4971 Dived to proceed submerged by day.  
    08.00 BF 4971    
      Weather absent because dived    
    09.33 - 09.39   Depth charges on the starboard side at about 50 nm.  
    11.48 - 11.57       "          "                       "          "           "       "  
    12.00 BF 4893 Day's run:  110.2 nm.  
      Weather absent because dived    
    16.00 BF 4895    
      Weather absent because dived    
    20.00 BF 4897    
      Weather absent because dived    
    21.11 BF 4897 Surfaced to proceed on the surface by night.  
           
    11.02.43      
    00.00 BF 7229    
      W 5, Sea 4-5, overcast, 1034 mb, +16°C, Vis. 8 nm, medium marine phosphorescence    
    04.00 BF 7168    
      W 5, Sea 4-5, overcast, 1034 mb, +16°C, Vis. 6-8 nm, medium marine phosphorescence    
    07.00   Course 270°, HF.  
           
           
Sun and Moon Data 10.02.43
Sun and Moon Data 11.02.43
 
- 3 -
 
           
           
           
    continued      
    11.02.43      
    07.56 BF 7177 Dived to proceed submerged by day.  
    08.00 BE 9399    
      Weather absent because dived    
    08.28   Asdic sounds bearing 340°T.  
    08.57   Sounds put astern, course 180°.  
    09.07   Single depth charges range 20-50 nm.  
    09.18   No Asdic sounds.  
    10.00   Asdic sounds to starboard.  
    10.05   Asdic sounds very loud [illegible word] propeller sounds.  
    10.19 BE 9633 Surfaced.  Ran off on course 180° at GF.  
      overcast (fog), ground fog, Vis. 300 meters    
    11.41   Course 270°.  
    12.00 BE 9662 Day's run:  153 nm.  
      W 2-3, Sea 2, medium swell, overcast (fog), Vis. 500 meters, 1015 mb, +16°C    
    12.37 BE 9661 Dived (fog).   
        No sound bearings.  
    14.35   Sound bearing to starboard.  
    16.00 BE 9653    
      Weather absent because dived    
    16.47   Course 240°.  
    19.33 BE 9655 4 depth charges (range about 30 nm) to starboard.  
    20.00 BE 9655    
      Weather absent because dived    
    20.30   Propeller sounds bearing 202°T, range about 20 nm.  
    20.43 BE 9655 Surfaced, to operate on sound bearing.  Course 230°, speed 12 knots, Vis. 3 nm.  
    21.39 BE 9657 Dived to listen.  
        Listening results:  Patrol vessel with new Asdic (tongue click or similar sound).  Last bearing 194°T.  
           
           
           
Sun and Moon Data 11.02.43
 
- 4 -
 
           
           
           
    continued      
    11.02.43      
    21.47 BE 9657 Surfaced.  Course 294°, HF.  
           
    12.02.43      
    00.00 BE 9641    
      WNW 3-4, Sea 3, overcast (rain) (fog), Vis. 6-10 nm, 1040 mb, +15°C, faint marine phosphorescence    
    04.00 BE 9524    
      WNW 3-4, Sea 3,, overcast, Vis. 10-12 nm, 1040 mb, +14°C, medium marine phosphorescence    
    08.00 BE 9195    
      W 4, Sea 3, overcast (fog), Vis. 6-10 nm, 1040 mb, +14°C, faint marine phosphorescence    
    12.00 BE 9146 Day's run:  180 nm.  
      WbyN 3, Sea 3, overcast (fog), Vis. 4-12 nm, 1040 mb, +14°C    
    16.00 BE 8338 Difference between dead reckoning and actual position after a navigation fix:  84°T, 22.3 nm.  
      WbyN 4, Sea 3, overcast (fog), Vis. 8 nm, 1040 mb, +13.5°C  
    20.00 BE 9967    
      WNW 3-4, Sea 3, overcast (fog), Vis. 6 nm, 1040 mb, +14.5°C    
           
    13.02.43      
    00.00 BE 5924    
      WbyN 3, Sea 2-3, overcast, Vis. 12 nm, 1041 mb, +14°C, light marine phosphorescence    
    04.00 BE 5675    
      WbyN 2-3, Sea 3, Vis. 20 nm, 1042 mb, +13.5°C, light marine phosphorescence    
           
           
Sun and Moon Data 11.02.43
Sun and Moon Data 12.02.43
Sun and Moon Data 13.02.43
 
- 5 -
 
           
           
           
    continued      
    13.02.43      
    08.00 BE 5562    
      WbyN 3, Sea 3, overcast (fog), Vis. 1000 meters, 1042 mb, +13.5°C    
    12.00 BE 5288 Day's run:  180 nm.  
      W 3, Sea 3, overcast (fog), Vis. 1000 meters, 1042 mb, +14°C    
    16.00 BE 5249 Difference between dead reckoning and actual position after a navigation fix:  135°T, 14 nm.  
      W 3, Sea 3, overcast (fog), Vis. 100 meters, 1041 mb, +15°C  
    18.03 BE 5245 Deep diving test.  Depth:  A +40 meters.  
    19.00   Surfaced, course 320°, KF.  
    20.00 BE 5241    
      SW 3, Sea 2-3, overcast (fog), Vis. 6-10 nm, 1041 mb, +14°C, light marine phosphorescence    
           
    14.02.43      
    00.00 BE 2797    
      SW 3-4, Sea 3, overcast (rain), Vis. 6-12 nm, 1038 mb, +13.5°C, light marine phosphorescence    
    04.00 BE 2758    
      SWbyW 4, Sea 3, overcast, Vis. 12 nm, 1038 mb, +13.5°C, light marine phosphorescence    
    08.00 BE 2715    
      SWbyS 4, Sea 3, overcast (fog), Vis. 6 nm, 1037 mb, +13°C    
           
           
Sun and Moon Data 13.02.43
Sun and Moon Data 14.02.43
 
- 6 -
 
           
           
           
    continued      
    14.02.43      
    12.00 BE 1695 Day's run:  162 nm.  
      SWbyS 4-5, Sea 3, overcast (fog), Vis. 8 nm, 1035 mb, +13°C    
    16.00 BE 1636    
      SW 5, Sea 3-4, overcast, Vis. 10-12 nm, 1031 mb, +13°C    
    20.00 BE 1624    
      W 5, Sea 4, overcast (rain), Vis. 6-12 nm, 1030 mb, +13°C    
           
    15.02.43      
    00.00 BE 1371    
      NW 5, Sea 4, overcast (rain), Vis. 8-12 nm, 1035 mb, +13°C, light marine phosphorescence    
    04.00 BE 1265    
      NW 6, Sea 4-5, cloudy, Vis. 12 nm. 1039 mb, +12.5°C, light marine phosphorescence    
    08.00 BE 1226    
      NW 5, Sea 4-5, cloudy, Vis. 10 nm, 1041 mb, +13°C, light marine phosphorescence    
    12.00 AL 8776 Day's run:  137 nm.  
      NWbyW 4-5, Sea 3-4, overcast, Vis. 12 nm, 1043 mb, +13°C    
    15.30 AL 7836 Dived to adjust torpedoes.  
    16.00 AL 7836 Difference between dead reckoning and actual position after a navigation fix:  355°T, 14 nm.  
      Weather absent because dived  
    20.00 AL 7832 Asdic sounds bearing 302°T and 5°T.  
      Weather absent because dived    
           
           
Sun and Moon Data 14.02.43
Sun and Moon Data 15.02.43
 
- 7 -
 
           
           
           
           
    16.02.43      
    00.00 AL 7598    
      Weather absent because dived    
    00.56 AL 7598 Surfaced.  
    01.00   Course 20°, HF.  
    04.00 AL 7566    
      SW 4, Sea 3-4, overcast, Vis. 12 nm, 1046 mb, +13°C, light marine phosphorescence    
    06.00   Course 0°, HF.  
    08.00 AL 8411    
      SW 4-5, Sea 4, overcast, Vis. 10 nm, 1046 mb, +12.5°C, light marine phosphorescence    
    08.24   Course 320°, HF.  
    12.00 AL 7267 Day's run:  125 nm.  
      SW 5, Sea 4, overcast, Vis. 10 nm, 1047 mb, +12°C Course 304°, HF.  
    16.00 AL 7237    
      SWbyS 4, Sea 3-4, overcast, Vis. 12 nm, 1045 mb, +11°C    
    20.00 AL 7139    
      SWbyS 4, Sea 3, overcast, Vis. 10 nm, 1043 mb, +11°C    
           
    17.02.43      
    00.00 AL 7123    
      SW 4-5, Sea 4, overcast, Vis. 12 nm, 1041 nm, +10.5°C, medium marine phosphorescence    
    04.00 AL 4746    
      SW 4, Sea 4, overcast, Vis. 8-10 nm, 1041 mb, +10.5°C, medium marine phosphorescence    
    08.00 AK 6968    
      SWbyW 4-5, Sea 4, overcast, Vis. 10 nm, 1040 mb, +11°C, light marine phosphorescence    
    12.00 AK 6928    
      SWbyW 4-5, Sea 4,    
           
Sun and Moon Data 16.02.43
Sun and Moon Data 17.02.43
 
- 8 -
 
           
           
           
    continued      
    17.02.43      
    12.00 AK 6928 Day's run:  152 nm.  
      SWbyW 3-5, Sea 4, overcast, Vis. 12 nm, 1040 mb, +11°C    
    13.19   Course 0°, HF.  
    16.00 AK 6684    
      W 5, Sea 4, overcast, Vis. 10 nm, 1040 mb, +11.5°C    
    16.19 AK 6684 Dived.  
    20.00 AK 6681    
      Weather absent because dived    
    23.17 AK 6657 Surfaced.  Course 30°, LF.  
           
    18.02.43      
    00.00 AK 6655    
      SWbyW 4, Sea 3, overcast, Vis. 10 nm, medium swell, 1040 mb, +10.5°C, light marine phosphorescence    
    04.00 AK 6396    
      SWbyW 4, Sea 3-4, medium swell, overcast, Vis. 8-10 nm, 1040 mb, +10°C, light marine phosphorescence    
    08.00 AL 4124    
      SW 4-5, Sea 4, medium swell, overcast, Vis. 8 nm, 1040 mb, +10.5°C, light marine phosphorescence    
    08.53 AL 1987 Dived.  
    09.18 AL 1987 Surfaced, boat ventilated.  
    09.34 AL 1987 Dived.  
    09.53   Course 210°, KF.  
    12.00 AL 1987 Day's run:  154 nm.  
      Weather absent because dived    
    16.00 AL 4121    
      Weather absent because dived    
           
           
Sun and Moon Data 17.02.43
Sun and Moon Data 18.02.43
 
- 9 -
 
           
           
           
    continued      
    18.02.43      
    20.00 AL 4119    
      Weather absent because dived    
    22.40 AL 4142 Surfaced, course 130°.  
           
    19.02.43      
    00.00 AL 4143    
      SSW 8, Sea 6-7, overcast, Vis. 6-8 nm, high swell, 1027 mb, +9°C, medium marine phosphorescence    
    03.51   Course 205°, LF.  
    04.00 AL 4185 Radio Message 2349/131:  
      SWbyW 8, Sea 7, high swell, Vis. 6-8 nm, +9°C, cloudy, 1027 mb, medium marine phosphorescence "Olrich", [Höltring], "Walkerling", and "Zurmühlen" form group "Knappen" and occupy from 20 February 00.00 hours patrol line from EJ 9295 to 9684 [AK 9293 to AK 9684].  Westbound convoy expected on 20 February.  From 19 February at 08.00 hours switch to Diana Circuit.  
    08.00 AL 4443    
      SWbyW 6-7, Sea 7, cloudy, Vis. 10 nm, high swell, 1027 mb, +9.5°C, light marine phosphorescence    
    12.00 AK 6933 Day's run:  143.4 nm.  
      SW 3, Sea 5, medium swell, cloudy, Vis. 12 nm, 1034 mb, +10.5°C    
    16.00 AK 6985    
      SEbyE 4, Sea 3, overcast, Vis. 6 nm, medium swell, 1026.5 mb, +11°C    
    20.00 AK 9354    
      SbyW 4, Sea 3, overcast (fog), Vis. 8 nm, medium swell, 1025 mb, +11°C    
    21.44 AK 9373 Dived to proceed submerged, to get larger detection range for the night.  
           
           
           
Sun and Moon Data 18.02.43
Sun and Moon Data 19.02.43
 
- 10 -
 
           
           
           
           
    20.02.43      
    00.00 AK 9373 Maneuver in patrol line.  
      Weather absent because dived    
    04.00 AK 9376    
      Weather absent because dived    
    08.00 AK 9612    
      Weather absent because dived    
    08.50   Propeller sounds bearing 40°T.  
    09.42 AK 9612 Surfaced.  Operated on propeller sounds.  
    09.44   Course 90°, speed 6 knots.  
    11.15 AK 9613 Enemy in sight to starboard bearing 6°T, range about 5000 meters.  Put destroyer astern with hard turn to port.  Very bad visibility.  Rain squalls.  Enemy course 230°.  Port flank escort makes recognition signal by searchlight.  Ran off at AK against the sea.  Corvette does not follow.  Due to bad visibility the enemy runs out of sight again.  Temporarily turned to 270° and regained contact.  1 steamer and 3 corvettes distinguished.  Held contact.  
    12.00 AK 9619 Day's run:  143 nm.  
      SW 5, Sea 4-5, high swell, overcast (rain), Vis. 5 nm, 1020 mb, +11°C    
    16.00 AK 9596    
      SW 5-6, Sea 4-5, high swell, overcast (rain), Vis. 8 nm, 1020 mb, +11°C    
    18.16 AK 9834 Convoy out of sight.  Held contact on enemy destroyer screen, forced off, then lost sight.  
           
           
           
           
           
           
Sun and Moon Data 20.02.43
 
- 11 -
 
           
           
           
    continued      
    20.02.43      
    20.00 AK 9861    
      SW 5, Sea 4-5, high swell, overcast, Vis. 10 nm, 1018 mb, +11.5°C    
    21.02 AK 9853 Quick dive to listen.  Sound bearing 10°T.  
    21.23 AK 9853 Surfaced.  
    21.30   Enemy in sight bearing 30°T, range 3 nm, apparently boat surfaced ahead of the convoy.  Forward sweeper about 500 meters astern while blowing.  The convoy must have gone on a southerly course.  
           
    21.02.43      
    00.00 AK 9881 From now contact keeping signals.  Boat has exceptionally good attack opportunity, ahead of the convoy and the moon has still not risen, plus forward sweeper was out maneuvered and boat is within the screen, however attack is forbidden.  
      SWbyW 4, Sea 3-4, medium swell, overcast, Vis. 10 nm, 1021 mb, +11.5°C, light marine phosphorescence  
      In accordance with Radio Message 1915/20/720:  
        To "Höltring" attack free as soon as another boat reports contact.  Send bearing signals.  
        Continuous bearing signals were sent up to depth charge pursuit.  
    01.43 AK 9887 Crash dive for destroyer.  
    01.47   5 close depth charges.  
    02.30   1 depth charge further off.  Destroyer must have located us because he could not have sighted us.  
    04.00 BD 3128 Surfaced.  Pursued on enemy course 190°, 200° at GF.  
      SW 4, Sea 3-4, medium swell, Vis. 12-14 nm, 1025 mb, +11.5°C, light marine phosphorescence    
    08.00 BD 3181    
      SW 3, Sea 3, medium swell, overcast, Vis. 12-14 nm, 1026 mb, +12°C, light marine phosphorescence    
    09.56 BD 3424 2 smoke clouds in sight bearing 201°T, range 10 nm.  Operating on smoke cloud.  Apparently the rear sweepers, because soon lost from sight again and not found with pursuit.  
           
           
Sun and Moon Data 20.02.43
Sun and Moon Data 21.02.43
 
- 12 -
 
           
           
           
    continued      
    21.02.43      
    12.00 BD 3458 Day's run:  186.5 nm.  
      Wind 2-3, Sea 2-3, medium swell, overcast, Vis. 14 nm, 1026 mb, +13°C    
    13.22 BD 3485 Crash dive for aircraft.  
    13.30   Sound bearing of the convoy bearing 260°T, range about 20-30 nm.  
    14.28   Surfaced.  Pursued at GF.  Frequent small diesel breakdowns due to faulty shipyard work.  For example, heavy lubricating oil loss from the starboard vibration damper, because during assembly the housing screws were only screwed 1 thread and not tightened.  As a result, highest speed could not be used.  
    16.00 BD 3721    
      NW 3-4, Sea 3, medium swell, overcast, Vis. 14 nm, 1029 mb, +12.5°C    
    17.00   Difference between dead reckoning and actual position after a navigation fix:  65°T, 33.5 nm.  
    20.00 BD 3748    
      NW 3, Sea 2-3, medium swell, overcast, Vis. 12-14 nm, 1030 mb, +11.5°C
Nothing found therefore,
 
    21.14 BD 2992 Dived to listen.  Sound bearing in a swath from 241°T to 251°T.  
        25 depth charges at medium range.  
    21.41 BD 2992 Surfaced.  Operated on sound bearing.  No further attack possibilities, because it is too bright.  
           
    22.02.43      
    00.00 BD 2984 Course 240°, LF, because otherwise against the sea there is no use of binoculars and lookouts are severely affected.  
      SW 3, Sea 2-3, light swell, overcast, Vis. 10-12 nm, 1030 mb, +11°C, medium marine phosphorescence  
           
           
           
Sun and Moon Data 21.02.43
Sun and Moon Data 22.02.43
 
- 13 -
 
           
           
           
    continued      
    22.02.43      
    00.14   Destroyer bearing 220°T, range 4-5 nm, target angle 0°, turned away at GF.  
    00.18   Destroyer bearing 330°T, range 6 nm, target angle 90-100°, bow right.  
    01.49   Destroyer passes out of sight bearing 290°T.  
        Apparently rear sweeper  
    02.24   Port diesel fails.  Course 120°, starboard HF.  
    03.15   Course 190°, LF.  
    04.00 BD 5529    
      SW 3-4, Sea 3, overcast, Vis. 8-10 nm, light swell, 1030 mb, +11°C, light marine phosphorescence    
    05.30   Course 270°, LF.  
    08.00 BD 5345    
      W 4, Sea 2-3, light swell, overcast, Vis. 10 nm, 1028 mb, +12°C, light marine phosphorescence    
    11.00   Difference between dead reckoning and actual position after a navigation fix:  51°T, 19 nm.  
   

11.06

11.57

  5000 GRT steamer in sight lying stopped, burning below the bridge bearing 270°T, range 13 nm.  Initiated attack for coup de grace.  At the same time the ex-Polish destroyer "BURZA" in sight.  Turned away.  Destroyer takes over the crew and sinks the steamer at 12.20 hours by torpedo.  Afterwards runs off at high speed.  
    12.00 BD 5259    
      SW 2-3, Sea 2, light swell, overcast, Vis. 12 nm, 1025 mb, +12°C    
    12.29   Pursued on convoy course.  
    16.00 BD 5258 Difference between dead reckoning and actual position after a navigation fix:  25.5°T, 5 nm.  
      SW 3-4, Sea 3, medium swell, overcast, Vis. 12 nm, 1025 mb, +12°C  
      Report from Manstein concerning independent BD 5255, main course 260°, speed 11 knots, own speed 9 knots.  
    18.48   Operating on reported independent, because it is close by and Manstein can not hunt at his own reported speed.  
           
           
Sun and Moon Data 22.02.43
 
- 14 -
 
           
           
           
    continued      
    22.02.43      
    20.00 BD 5192    
      SW 5, Sea 4, medium swell, overcast, Vis. 10 nm, 1023 mb, +12°C    
    20.03 BD 5192 Dived to listen.  Only faint sounds heard.  
    20.30 BD 5168 Surfaced.  Course 245°, HF.  Operating on convoy.  
           
    23.02.43      
    00.00 BD 5184    
      SWbyW 5-6, Sea 4-5, overcast (rain), Vis. 8-10 nm, 1022 mb, +12°C, light marine phosphorescence    
    03.04 BD 4633 Steamer bearing 87°T, range about 2500 meters.  Steamer course 230°, speed 12 knots.  
    03.09   Came to attack course with hard turn to starboard.  
    03.12   4-fan shot.  2 hits.  
    03.15 AD 4633 Steamer sunk.  
        Steamer was a single smokestack ship with island type, two deck passenger superstructure.  Meier bow, cruiser stern.  Type like:  "BOSCHFONTAIN" from "Merchant Ships" 7000 GRT after two hits internal explosion, after 3 minutes sunk.  
    03.16   Course 245°, LF.  Operating on convoy.  
    04.00 BD 4635    
      SWbyW 4-5, Sea 4, medium swell, overcast (rain), Vis. 1000 meters, 1022 mb, +11.5°C, medium marine phosphorescence    
    05.32 BD 4635 Dived to reload torpedoes.  Loud destroyer sounds ahead to port, probably the rear sweeper.  
           
           
           
Sun and Moon Data 22.02.43
Sun and Moon Data 23.02.43
 
- 15 -
 
           
           
           
    continued      
    23.02.43      
    08.00 BD 4628    
      SW 3-4, Sea 4, overcast, Vis. 8-10 nm, medium swell, 1025 mb, +11.5°C    
    08.54 BD 4628 Surfaced.  Course 245°, GF.  Converted to ballast tank mode [main ballast and reserve fuel oil tanks]  
    12.00 BD 4566 Day's run:  219 nm.  
      SW 2-3, Sea 2, light swell, overcast, Vis. 10 nm, 1020 mb, +11°C    
    12.45 BD 4566 Test dive.  
      BD 4566 Surfaced.  No sound bearings.  
    13.27   Course 245°, HF.  
    16.00 BD 4582 Difference between dead reckoning and actual position after a navigation fix:  90°T, 3.8 nm.  
      SW 4-5, Sea 4, medium swell, overcast (rain), Vis. 6-8 nm, 1018 mb, +12°C  
    16.35   GF.  
    17.13 BD 4573 A cutter with red sails bearing 346°T.  
    20.00 BD 4734    
      SW 3-4, medium swell, Sea 3, overcast, Vis. 12 nm, 1022 mb, +14°C    
    19.57   Course 180°, GF.  
    20.24         "     310°,   "  
           
    24.02.43      
    00.00 BD 4478 Because the convoy, from the experience of the last two nights, has deployed a remote escort approximately 30-40 nm astern, decide to avoid it by a large margin, because the boat must constantly run across the remote escort while pursuing on convoy course.  
      SW 4, Sea 3-4, medium swell, overcast, Vis. 10 nm, 1018 mb, +12.5°C, medium marine phosphorescence  
    04.00 BC 6926    
      W 5-6, Sea 4, medium swell, Vis. 6-8 nm, 1017 mb, +12°C, medium marine phosphorescence    
           
           
Sun and Moon Data 23.02.43
Sun and Moon Data 24.02.43
 
- 16 -
 
           
           
           
    continued      
    24.02.43      
    08.00 BC 6941    
      W 5-6, Sea 4, medium swell, overcast (rain), Vis. 8-10 nm, 1017 mb, +12°C    
    08.43   Course 180°, GF.  
    08.58   Course 200°, GF.  
    10.18 BC 6898 Dived to listen.  
    10.30   Course 180°.  No propeller sounds heard.  G.H.G. not in order.  
    11.25 BC 6898 Surfaced.  
    12.00 BC 9232 Day's run:  220 nm.  
      W 1, Sea 2, overcast, Vis. 10 nm, 1030 mb, +13°C    
    14.17 BC 9225 4 heavy aircraft bombs from a flying boat "Consolidated" at depth 18 meters.  Flying boat threw too far - the first bomb directly astern to starboard, three others further away.  Train release.  Both compressors wrenched off, shafts shifted in an axial direction, diesel clutches knock strongly, main clutches cannot release completely.  50 cm long crack in main ballast tank V, tank vented very quickly.  Set off on course 50° for repairs.  
    16.00 BC 9221    
      Weather absent because dived    
    16.21 BC 9221 Surfaced.  
    16.23   Course 50°.  
    20.00 BC 6943    
      SW 2, Sea 1-2, Vis. 12 nm, overcast, 1032 mb, +13°C    
    20.06   Course 112°, LF.  
           
           
           
           
Sun and Moon Data 24.02.43
 
- 17 -
 
           
           
           
           
    25.02.43      
    00.00 BC 6964 During the night the base of both compressors was welded.  The Junkers compressor is again in service.  Cooling water hull valve leaks heavily.  Tightened loose fitting bolts.  It is assumed that during the last shipyard period the stud nuts were not properly tightened.  With the loose bolts the packing was ripped out or crushed.  Suspect that the stud nuts may have broken.  
      SW 1-2, Sea 1, Vis. 12 nm, overcast, 1034 mb, +13°C, light marine phosphorescence  
    04.00 BC 6969  
      SW 2, Sea 1, Vis. 8-10, overcast, +13.2°C, 1034 mb, medium marine phosphorescence  
         
         
    08.00 BD 6784    
      SW 1-2, Sea 1, Vis. 10 nm, overcast, 1036 mb, +13°C, light marine phosphorescence    
    09.30   Difference between dead reckoning and actual position after a navigation fix:  90°T, 9.8 nm.  
    10.26 BD 7132 Repairs to main ballast tank V.  Course 350°.  
    12.00 BD 4794    
      S 2, Sea 1-2, overcast, Vis. 12 nm, 1036 mb, +14°C    
    16.00 BD 7136    
      S 2-3, Sea 2, cloudy, Vis. 12 nm, 1038 mb, +14°C.    
    18.25 BD 7217 Dived to adjust the cooling water hull valve flanges.  
        Depth A +70 meters.  Flanges still leak only lightly.  
    20.00 BD 7241    
      Weather absent because dived    
    20.44 BD 7245 Surfaced.  
           
    26.02.43      
    00.00 BD 7212    
      S 2-3, Sea 2, overcast (rain), Vis. 8-10 nm, 1033 mb, +15°C, light marine phosphorescence    
    09.30   Course 90°, HF.  Began return transit due to the damage.  
           
           
Sun and Moon Data 25.02.43
Sun and Moon Data 26.02.43
 
- 18 -
 
           
           
           
    continued      
    26.02.43      
    04.00 BD 4888    
      S 3, Sea 2-3, overcast (rain), Vis. 8 nm, 1022 mb, +13°C, light marine phosphorescence    
    08.00 BD 4899 In my opinion, the lookout, the No. 1 Seaman, is not to be reproached for the late sighting, because the aircraft came out of a strong layer of haze and was recognized only with naked eye by the port forward sector which had just been searched with binoculars.  
      S 3, Sea 2-3, overcast, Vis. 10 nm, 1030 mb, +13°C, light marine phosphorescence  
    12.00 BD 4979 Day's run:  147 nm.  
      S 3-4, Sea 3, overcast, Vis. 12 nm, 1030 mb, +13°C    
    16.00 BD 4989 Even with the low sea state the boat lies very badly in the sea, because main ballast tanks IV and II both are leaking, the boat floats on the watertight bow, the remaining V, III and half of I which is flooded to put boat on an even keel.  
S 3-4, Sea 3, overcast, Vis. 12 nm, 1030 mb, +13°C
    17.00   Difference between dead reckoning and actual position after a navigation fix:  54°T, 6.5 nm.  
    17.08   Course 125°, LF.  
    19.50   By the instructions of the Kommandant on various courses to search for U-"Vowe".  
    20.00 BD 5778    
      S 3-4, Sea 3, overcast, Vis. 10 nm, 1029 mb, +12°C    
    23.58 BD 5747 Dived.  Course 180°.  
           
    27.02.43      
    00.00 BD 5747 In conclusion, for the convoy operation it can be said that the boat would have caught the convoy without a doubt if it had not been hindered by frequent minor diesel repairs which prevented utilization of its highest speed and further delayed by the destroyers on the 22 February the wrecked steamer on the 22nd and the sinking with subsequent reload on 23 February.  
      Weather absent because dived  
    04.00 BD 5771  
      Weather absent because dived  
    08.00 BD 5774  
      Weather absent because dived  
           
           
           
Sun and Moon Data 26.02.43
Sun and Moon Data 27.02.43
 
- 19 -
 
           
           
           
    continued      
    27.02.43      
    09.18 BD 5777 Surfaced.  
    12.00 BD 8111 Day's run:  116 nm.  
      SbyW 2-3, Sea 2, medium swell, overcast (fog), Vis. 6-8 nm, 1028 mb, +12°C    
    14.00 BD 8111 U-Vowe in sight, bearing 330°T, range about 8 nm.  
    14.00 - 16.00   Took over new Fu.M.B.s and 8 pairs of binoculars.  
    16.00 BD 8112    
      SSW 2, Sea 2, medium swell, overcast (fog), Vis. 12 nm, 1030 mb, +14°C    
    20.00 BD 5798    
      SW 2, Sea 2, medium swell, cloudy, Vis. 12 nm, 1030 mb, +14.5°C    
           
    28.02.43      
    00.00 BD 5879    
      SE 2, Sea 2, light swell, cloudy, Vis. 10 nm, 1032 mb, +14°C, heavy marine phosphorescence    
    04.00 BD 5898    
      E 2-3, Sea 2, overcast, Vis. 8 nm, 1035 mb, +14°C, heavy marine phosphorescence    
    08.00 BD 5979    
      E 2, Sea 2, cloudy, Vis. 8 nm, 1039 mb, +15°C, medium marine phosphorescence    
    12.00 BD 5997 Day's run:  162 nm.  
      E 3-4, Sea 2, overcast (fog), Vis. 6 nm, 1039 mb, +16°C    
    16.00 BD 9111    
           
           
           
Sun and Moon Data 27.02.43
Sun and Moon Data 28.02.43
 
- 20 -
 
           
           
           
    continued      
    28.02.43      
    16.00 BD 9111    
      S 3, Sea 2, cloudy, Vis. 14 nm, 1040 mb, +16.5°C    
    20.00 BD 9122    
      SbyE 3, Sea 2, cloudy, Vis. 12 nm, 1040 mb, +16°C    
    20.50 BD 9123 Test dive.  
    21.18 BD 9131 Surfaced.  
           
    01.03.43      
    00.00 BD 9133    
      SE 3, Sea 2, overcast, Vis. 10 nm, 1040 mb, +14°C, medium marine phosphorescence    
    04.00 BD 9221    
      SE 3, Sea 2, overcast (rain), Vis. 10 nm, 1042 mb, +14°C, medium marine phosphorescence    
    08.00 BD 9232    
      E 3, Sea 2-3, cloudy, Vis. 10 nm, 1040 mb, +13°C, light marine phosphorescence    
    12.00 BD 9313 Day's run:  163 nm.  
      E 3-4, Sea 3, medium swell, cloudy, Vis. 12 nm, 1039 mb, +13°C    
    16.00 BD 9322 Difference between dead reckoning and actual position after a navigation fix:  275°T, 13 nm.  
      EbyS 4, Sea 3, medium swell, cloudy, Vis. 12 nm, 1038 mb, +14°C  
           
           
           
Sun and Moon Data 28.02.43
Sun and Moon Data 01.03.43
 
- 21 -
 
           
           
           
    continued      
    01.03.43      
    20.00 BD 9333    
      E 4, Sea 3, Vis. 10 nm, overcast, medium swell, 1038 mb, +14°C    
           
    02.03.43      
    00.00 BE 7111    
      E 4, Sea 3, Vis. 10 nm, overcast, medium swell, 1038 mb, +13°C, light marine phosphorescence    
    04.00 BE 7122    
      E 4, Sea 3, medium swell, overcast (rain), Vis. 8-10 nm, 1038 mb, +13°C, light marine phosphorescence    
    08.00 BE 7132    
      E 4, Sea 3, medium swell, Vis. 8 nm, 1038 mb, +13°C, light marine phosphorescence    
    08.58 BE 7153 Dived.  
    12.00 BE 7211 Day's run:  128.5 nm.  
      Weather absent because dived    
    16.00 BE 7212    
      Weather absent because dived    
    20.00 BE 7213    
      Weather absent because dived    
    21.50 BE 7221 Surfaced.  
           
           
           
           
           
Sun and Moon Data 01.03.43
Sun and Moon Data 02.03.43
 
- 22 -
 
           
           
           
           
    03.03.43      
    00.00 BE 7222    
      E 3-4, Sea 3, medium swell, overcast (rain), Vis. 8 nm, 1024 mb, +13°C, medium marine phosphorescence    
    04.00 BE 7233    
      ENE 3, Sea 3, medium swell, overcast (rain), Vis. 6-8 nm, 1022 mb, +13°C, medium marine phosphorescence    
    08.00 BE 7321    
      ESE 3-4, Sea 3, medium swell, overcast (rain), Vis. 6 nm, 1023 mb, +13°C, medium marine phosphorescence    
    08.25 BE 7321 Dived.  
    09.22 BE 7322 4 aircraft bombs or torpedo detonation bearing 0°T, range about 30-50 nm.  
    12.00 BE 7322 Day's run:  92 nm.  
      Weather absent because dived    
    12.14   4 detonations to port, range about 40 nm.  
    14.22   Faint diesel sounds bearing 260°R.  
    15.05      "        "         "           "      330°R beyond listening range.  
    16.00 BE 7323    
      Weather absent because dived    
    20.00 BE 7331    
      Weather absent because dived    
    20.43 BE 7331 Surfaced.  
    21.04   Course 97°, LF.  
           
           
           
Sun and Moon Data 03.03.43
 
- 23 -
 
           
           
           
           
    04.03.43      
    00.00 BE 8111    
      N 4, Sea 3-4, medium swell, overcast, Vis. 8 nm, 1020 mb, +13°C, medium marine phosphorescence    
    04.00 BE 8124    
      N 4, Sea 3-4, medium swell, cloudy, Vis. 8 nm, 1019 mb, +13°C, medium marine phosphorescence    
    08.00 BE 8138    
      NE 2-3, Sea 1-2, medium swell, 1026 mb, +13°C, light marine phosphorescence    
    08.19 BE 8139 Dived.  
    11.36      " 4 aircraft bombs to port, range about 30 nm.  
    11.50      " 1 detonation.  
    12.00 BE 8139 1 detonation.  
      Weather absent because dived Day's run:  95.5 nm.  Dived.  
    12.32 - 15.35   48 depth charges, range about 30-40 nm to starboard ahead.  
    16.00 BE 8217    
      Weather absent because dived    
    18.58   3 depth charges, range 30-40 nm to starboard ahead.  
    20.00 BE 8218    
      Weather absent because dived    
    20.10   3 depth charges, range 30-40 nm starboard ahead.  
    21.02 BE 8218 Surfaced.  
           
    05.03.43      
    00.00 BE 8261 Course 97°, HF.  
      NE 3, Sea 2-3, overcast, Vis. 8 nm, 1028 mb, +13.5°C, medium marine phosphorescence    
    04.43   Radio Message 1547/4/21 from Communications Center.  
        Air reports 12.50 hours a 2nd convoy in CG 1453 at slow speed northerly course.  Consists of 20 merchant ships and 6 escort vessels.  
           
           
           
Sun and Moon Data 04.03.43
Sun and Moon Data 05.03.43
 
- 24 -
 
           
           
           
    continued      
    05.03.43   - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  
    04.00 BE 8346 Convoy 16-20 steamers sighted square BE 9764, speed 5-7 knots, course 20°.  10.30 hours from "U-130".  
      NE 3-4, Sea 2, medium swell, overcast, Vis. 8 nm, 1029 mb, +14°C, medium marine phosphorescence  
      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  
      1.)  Outbound boats, insofar as position permits and favorable inbound boats, insofar as fuel permits, operate on "Keller"-convoy.  
     
    08.00 BE 8365 2.)  "Keller" attack.  Report contact.  
      NE 4, Sea 3-4, medium swell, overcast, Vis. 8 nm, 1027 nm, +13.5°C, light marine phosphorescence    
         
         
    08.08 BE 8365 Dived.  
    10.30   1 detonation to starboard.  
    10.38   2 detonations to starboard.  
    12.00 BE 8369 Day's run:  127 nm.  
      Weather absent because dived    
    13.26   2 detonations to starboard  
    16.00 BE 9147    
      Weather absent because dived    
    17.50 - 17.55 BE 9147 2 detonations (probably torpedoes), range about 30 nm.  
    18.00   Detonations (Artillery fire).  
    18.15 - 18.42 BE 9147 19 detonations, depth charges, (aircraft bombs), to starboard, 30-50 nm  
    20.00 BE 9148    
      Weather absent because dived    
    20.15 - 20.45 BE 9148 6 detonations depth charges (aircraft bombs) to starboard, 30-40 nm  
    20.57 BE 9148 Surfaced, course 96°, LF.  
           
    06.03.43      
    00.00 BE 9159 By plotting the boat must be at the convoy at 01.15 hours, according to "Keller" report by Short Signal at 15.12 hours.  
      NEbyE 3-4, Sea 2-3, overcast, 1032 mb, +14°C, medium marine phosphorescence  
    00.48 BE 9191 Dived to listen.  
           
           
           
Sun and Moon Data 05.03.43
Sun and Moon Data 06.03.43
 
- 25 -
 
           
           
           
    continued      
    06.03.43      
    00.59   Surfaced.  Course 96°, diesel-electric.  
    04.00 BE 9271    
      E 3-4, Sea 3, medium swell, Vis. 6-8 nm, 1034 mb, +14°C, cloudy, medium marine phosphorescence    
    07.53 BE 9253 Dived.  
    08.00 BE 9253 Difference between dead reckoning and actual position after a navigation fix:  32°T, 24 nm.  
      E 1-2, Sea 2, light swell, Vis. 8 nm, 1035 mb, +14°C, overcast  
    08.03   Faint propeller sounds bearing 164°T, with 2 [sets of ] sound gear.  
    08.32 - 08.46   12 detonations (depth charges) bearing 164°T.  
    09.10 - 13.45   Faint propeller sounds from search group bearing 169°T.  
    13.45   Out of sound range bearing 246°T.  
    12.00 BE 9261 Day's run:  104 nm.  
      Weather absent because dived    
    15.25 BE 9265 Faint propeller sounds, quickly out of sound range bearing 146°T.  
    15.28   5 detonations bearing 150-180°T.  
    15.30   1         "             "             "  
    15.58   5         "             "             "         . faint.  
    16.00 BE 9265    
      Weather absent because dived    
    16.14 - 19.37 BE 9265 10 detonations bearing 176°T to 166°T, faint.  
    20.00 BE 9266    
      Weather absent because dived    
    20.51 BE 9266 Surfaced, course 96°, HF.  
           
    07.03.43      
    00.00 BE 9356 (L.I. / 26 nm / ,  / 87 nm / )  
      ENE 2-3, Sea 2, overcast, Vis. 8 nm, 1030 mb, +13°C, medium marine phosphorescence    
           
           
           
Sun and Moon Data 06.03.43
Sun and Moon Data 07.03.43
 
- 26 -
 
           
           
           
    continued      
    07.03.43      
    01.38   Course 86°, HF.  
    04.00 BF 7154    
      EbyN 2-3, Sea 1-2, overcast, Vis. 6-8 nm, 1030 mb, +13°C, medium marine phosphorescence    
    07.35 BF 7245 Dived to proceed submerged.  
    08.00 BF 7246    
      E 3, Sea 2, overcast, Vis. 8 nm, 1030 mb, +13°C, medium marine phosphorescence, weather on diving    
    12.00 BF 7254 Day's run:  150 nm.  
      Weather absent because dived    
    12.51 BF 7254 Surfaced to shoot the sun.  
    12.56   Dived to proceed submerged.  
    15.02 BF 7255 Surfaced.  
    15.04   Dived to proceed submerged.  
    16.00 BF 7255 Difference between dead reckoning and actual position after a navigation fix:  214°T, 8 nm.  
      Weather absent because dived  
    20.00 BF 7256    
      Weather absent because dived    
    20.30 BF 7256 Surfaced.  
           
    08.03.43      
    00.00 BF 7317 (L.I. / 21.1 nm / ,  /111 nm / )  
      EbyN 2, Sea 2, overcast, Vis. 8-10 nm, 1024 mb, +13°C, light marine phosphorescence    
    00.43 BF 7315 Crash dive (detection).  
    01.44 BF 7315 Surfaced.  
    01.56 BF 7316 Crash dive (detection).  
    03.27 BF 7324 Surfaced, course 60°, HF.  
    04.00 BF 7324    
      EbyN 2-3, Sea 1-2, overcast, Vis. 10 nm, 1023 mb, +13°C, light marine phosphorescence    
           
           
Sun and Moon Data 07.03.43
Sun and Moon Data 08.03.43
 
- 27 -
 
           
           
           
    continued      
    08.03.43      
    06.40 BF 4982 Crash dive (detection).  
    08.00 BF 4982    
      Weather absent because dived    
    12.00 BF 4983 Day's run:  111 nm.  
      Weather absent because dived    
    13.35 BF 4965 Surfaced, course 60°, GF.  
    16.00 BF 5742 Dived to proceed submerged  
      NNE 2, Sea 1-2, overcast, Vis. 14 nm, 1025 mb, +13.5°C    
    17.00   Difference between dead reckoning and actual position after a navigation fix:  60.5°T, 11.5 nm.  
    20.00 BF 5724    
      Weather absent because dived    
    20.01 BF 5724 Surfaced.  
    23.52   By the instructions of the Kommandant steered courses to enter Brest.  
           
    09.03.43      
    04.06   Dived to await escort.  
    10.14   Surfaced.  
    10.16   Taken in convoy.  
        Entered Brest by the instructions of the Kommandant.  
    14.30   Made fast Brest.  
           
                On board, 9 March 1943  
                     
                Kapitänleutnant and Kommandant  
           
           
           
           
           
           
           
           
           
           
           
Sun and Moon Data 08.03.43
Sun and Moon Data 09.03.43

  Appendices to U-604's KTB - click on the text at left to proceed to the documents
   
Chart Track chart for the period 8 February to 9 March 1943
   
Radio Excerpt of the Radio Log

 
 
     
 

Comments of the Befehlshabers der Unterseeboote on the

 
 
K.T.B. of "U-604" from 1.1.43 - 9.3.43.
 
     
  The operation of the Kommandant on the Höltring-convoy was not satisfactory.  It was impaired by diesel breakdowns and an initially existing attack prohibition which unfortunately did not prevent breaking contact.  
  More was expected from the Kommandant on this operation!  
  The return transit was begun due to heavy aircraft damage.  
     
  Accredited success:  
  1 passenger freighter            7000 GRT sunk.  
     
     
   

For the Befehlshaber der Unterseeboote

 
    - The Chief of the Operations Department -  
 
 
                       
            
     


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