U-1305 - 1st War Patrol

Translation by Jerry Mason with help from Robert Derencin

Departed
Date
Arrived
Date
Days at Sea
Stavanger
4 April 1945
Loch Eriboll, UK
10 May 1945
37

 

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
24 Apr 45
14.44
55°21'N, 8°05'W
MONMOUTH COAST
878
British
 
     
 Total = 878
   
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.-T.-B.  
                                                    = = = = = = =  
                                            1st War Patrol "U-1305"  
                                             from 17.03.45 up to___  
           
    17.03.45 Kiel    
    14.20   Departed Kiel-Wik to transit to the north together with "U-2511".  
    15.45   Anchored Anchor Location "G".  
    16.00 Kiel Lightship    
      NE 1-2, Sea 0-1, passing showers, Vis. 6 nm, 1023 mb    
18.40   End of twilight.
20.00 Kiel Lightship  
  NE 0-1, Sea 0, passing showers, Vis. 6 nm, 1025 mb  
24.00 Kiel Lightship    
  WNW 2, Sea 0-1, Vis. about 3 nm, 1027 mb    
           
    18.03.45 Kiel Lightship    
    03.57   Incoming Radio Message 0142/18/k 21:  "U-2511", "U-1305":  Taken in convoy 18 March 04.30 hours Rot 01.  
                                                                5.U.-Flottille.  
    04.00 Kiel Lightship    
      NW 1-2, Sea 0, clear sky, Vis. 8 nm, 1030 mb    
    04.10   Raised anchor!  With E-motors back and forth in position. Escort does not arrive.  
    06.18   End of twilight.  
    08.00 Kiel Lightship Anchored again at "G".  
      NW 1-2, Sea 0, clear sky, Vis. 8 nm, 1030 mb    
        Mid morning fire control training.  
    08.39   "U-2511" requests escort by Radio Message.  
    12.00 Kiel Lightship Day's run:  4.5 nm.  
      NNW 1-2, Sea 0, clear sky, Vis. 6 nm, 1026 mb    
    16.00         "    
    19.28   End of twilight.  
        Flashing light from "U-2511":  Meeting escort 19 March at 15.00 hours due to failure of escort boat.  
    20.00 NNW 0-1, Sea 0, clear sky, Vis. 4 nm, 1027 mb    
    24.00 NNW 0-1, Sea 0, clear sky, Vis. 4 nm, 1028 mb    
           
        © U-boat Archive 2014  - all rights reserved  
Click the flag to view the above page from the original German KTB
Sun and Moon Data 17.03.45
Sun and Moon Data 18.03.45
Sun and Moon Data 19.03.45
 
- 2 -
 
           
           
           
           
    19.03.45 Kiel Lightship    
    04.00 SSW 0-1, Sea 0, clear sky, Vis. 8 nm, 1025 mb    
    05.30   Beginning of twilight.  
    08.00 SSW 0-1, Sea 0, clear sky, Vis. 8 nm, 1024 mb Fire control training, damage control training, role duty.  
    12.00 SW 0-1, Sea 0, passing showers, Vis. 6 nm, 1022 mb Day's run:  0 nm.  
    14.40   Raised anchor!  Taken under escort.  Took station as second in line.  S&T deployed. [mine countermeasure]  
    16.00 AO 7731    
      SE 0-1, Sea 0, clear sky, Vis. 6 nm, 1020 mb    
    19.27   End of twilight.  
    19.30   Due to fog anchored square AD 7469.  
    20.00 AO 7469    
      SW 1-2, Sea 0-1, clear sky, Vis. 6 nm, 1020 mb    
    24.00 SW 3, Sea 1-2, overcast, passing showers, Vis. 5 nm, 1015 mb    
           
    20.03.45 Great Belt    
    04.00 SW 4, Sea 2, passing showers. mist, Vis. 4 nm, 1010 mb    
    05.24   Beginning of twilight.  
    06.42   Outgoing Radio Message 0630/20/k58:  5.U.-Flottille proceeding in convoy with "U-2511"  
                                                    "U-1305" (Christiansen)  
    08.00 AO 7641    
      WSW 7, Sea 3, clear sky, Vis. 8 nm, 1005 mb    
    08.42   Kosør abeam.  
    10.20   Due to weather anchored off Romsø.  Escort vessel can no longer deploy gear.  
    11.25   Outgoing Radio Message 1020/20/k62  32:  
        5.U.-Flottilla:  Due to weather anchored off Romsø with "U-2511".  
                                                    "U-1305" (Christiansen)  
    12.00 AO 7199 Day's run:  80.7 nm.  
      WSW 7-8, Sea 4, clear sky, Vis. 8 nm, 1007 mb    
    16.00 WSW 6, Sea 3, cloudy, Vis. 8 nm, 1010 mb    
    19.23   End of twilight.  
           
           
           
Sun and Moon Data 19.03.45
Sun and Moon Data 20.03.45
 
- 3 -
 
           
           
           
    continued      
    20.03.45      
    20.00 W 6, Sea 3, cloudy, Vis. 8 nm, 1012 mb    
    24.00 WSW 6, Sea 3, blue sky, Vis. 8 nm, 1011 mb    
           
    21.03.45 "Romsø"    
    04.00 NW 6, Sea 3, blue sky, Vis. 8 nm, 1011 mb    
    05.22   Beginning of twilight.  
    05.45   Raised anchor!  Continued transit in convoy.  Hohentwiel [radar] system out of service due to the burnout of a condenser after 4 hours of operation.  
    08.00 AO 7195    
      W 7, Sea 3, 3/10, Vis. 6 nm, 1010 mb    
    10.19   Anchored off Samsø with "U-2511".  Escort boat runs towards Aarhus to coal.  
    12.00 AO 7167 Day's run:  28 nm.  
      NW 6, Sea 2, 7/10, Vis. 10 nm, 1012 mb    
    16.00 NW 4, Sea 1, blue sky, Vis. 10 nm, 1015 mb    
    19.37   End of twilight.  
    20.20 NW 1-2, Sea 0-1, overcast, Vis. 10 nm, 1020 mb    
    24.00 SW 2, Sea 0-1, clear sky, Vis. 5 nm, 1022 mb    
           
    22.03.45 "Samsø"    
    04.00 SW 1-2, Sea 0, clear sky, Vis. 5 nm, 1024 mb    
    05.15   Beginning of twilight.  
    08.00 SW 1, Sea 0, clear sky, Vis. 8 nm, 1026 mb    
    10.20   Convoy transit continued:  U-boat again ready.  
    10.53   Outgoing Radio Message 1030/22/k79:  
        5.U.-Flottilla:  Convoy cruise with "U-2511" continued.  
                                                    "U-1305" (Christiansen)  
    12.00 AO 7191 Day's run:  15 nm.  
      WSW 1, Sea 0, overcast/mist, Vis. 5 nm, 1027 mb    
    13.45 - 14.00   Anchored for a short time, due to route closure.  Abeam "Sjellands Odde" brief detection in Borkum scope.  
    16.00 AO 7241    
      WSW 0-1, Sea 0, 3/10, Vis, 8 nm, 1027 mb    
    21.15   Air danger for the Kattegat.  Borkum gear out of service.  
           
Sun and Moon Data 20.03.45
Sun and Moon Data 21.03.45
Sun and Moon Data 22.03.45
 
- 4 -
 
           
           
           
    continued      
    22.03.45      
    23.23   Outgoing Radio Message 2304/22/k90:  
        5.U.-Flottilla:  Point Schwarz 14 released from convoy proceeding alone with "U 2511".  
                                                    "U-1305" (Christiansen)  
    24.00 AO 4818    
      W 2, Sea 0-1, blue sky, Vis. 10 nm, 1027 mb    
           
    23.03.45 "Kattegat"    
    02.58   Outgoing Radio Message 0225/23/k91:  
        5.U.-Flottilla:  Have lost sight of "U 2511" in thick fog.  Anchored on Route 48 between Position 5 and 6..  
                                                    "U-1305" (Christiansen)  
    04.00 W 1-2, Sea 0, fog, Vis. 100 meters, 1026 mb    
    05.19         " Beginning of twilight.  
    08.00 W 1, Sea 0, blue sky, Vis. 200 meters, 1026 mb    
    09.00   Raised anchor!  
    09.01   Outgoing Radio Message 0845/23/k91:  
        5.U.-Flottilla:  Waiting for darkness at Skagen.  Then will continue.  
    11.15   Anchored, because the fog is too thick.  
    12.00 AO 4493 Day's run:  155 nm.  
      W 1-2, Sea 1, fog, Vis. 80 meters, 1027 mb    
    14.20   Raised anchor!  
    14.30   Drifting mine shot with 3.7 cm square AO 4547.  
    16.00 AO 4544    
      W 1, Sea 1, fog, Vis. 120 meters, 1027 mb    
    19.44   End of twilight.  
    23.20   Anchored 1 nm west of Færder Lighthouse, because entry into Oslo Fjord by night is prohibited.  
    24.00 AO 4123    
      SW 2, Sea 0-1, fog, Vis. 120 meters, 1027 mb    
           
    24.03.45      
    01.35   1 minute detection on Mücke.  
    02.50   Detection on Fliege (5 minutes).  
    02.58   Outgoing Radio Message 0230/24/k5:  
        See Commander:  [illegible handwritten message]  
                                                                "U-1305"  
    04.00 SW 1, Sea 1, fog, Vis 120 meters, 1027 mb    
    08.00 SW 1, Sea 0, fog, Vis. 80 meters, 1028 mb    
    10.15   Raised anchor!  Entered Oslo Fjord in thick fog.  
    12.00 AO 1689 Day's run:  85 nm.  
      SE 1, Sea 0, fog, Vis. 150 meters, 1029 mb    
    16.00 Oslo Fjord    
      SW 1, Sea 0, fog, Vis. 150 meters, 1029 mb    
           
Sun and Moon Data 22.03.45
Sun and Moon Data 23.03.45
Sun and Moon Data 24.03.45
 
- 5 -
 
           
           
           
    continued      
    24.03.45      
    18.00   Anchored off Østøy.  Entering Horten is not possible because of fog.  
    18.40   Outgoing Radio Message 1805/24/k12:  
        5.U.-Flottilla:  Local office Agru-Front.  Anchored off Østøy.  
    19.22   End of twilight.  
    20.00 SW 1/2, Sea 0, fog, Vis. 100 meter, 1025 mb    
    24.00
-  "  -
   
           
    25.03.45 "Oslo Fjord"    
    04.00 SW 1/2, Sea 0; fog, Vis. 100 meters, 1025 mb    
    05.01   End of twilight  
    08.00
-  "  -
   
    12.00 SW 1, Sea 0, fog, Vis. 200 meters, 1023 mb Day's run:  29 nm.  
    13.04   Raised anchor, due to visibility improving.  
    15.00   Off Horton Roads.  After consulting with No. II anchored at Anchorage 3.  Rubber dinghy tested.  
           
    26.03.45      
    07.00 E 1, Sea 0, fog, Vis. 500 meters, 1021 mb Raised anchor for harbor cruise.  Snorkeling not possible due to fog.  2nd Watch Officer with Masch.Gefr. Küchler in rubber dinghy ashore.  Küchler in the district hospital for 2 days because of boils.  
    10.15   Anchored Anchorage 3.  
    13.30   Raised anchor, due to visibility improvement.  Afternoon snorkel training with Obltn. Funke and 1 Ob.Masch.  
    19.00   Anchored Anchorage 3.  
           
    27.03.45 "Horten"    
    07.00 E 0, Sea 0, mist, Vis. 5 nm, 1018 mb Raised anchor.  
    08.00   Embarked Ltn.(Ing.) Funke, Ob.Masch. Jenneke, 2 Engineering Officer students and Radioman Specialist for snorkel installation adjustment in square II.  Disembarked the Radioman who replaced the Hohentweil amplifier.  
        Borkum system again operable after replacement of resistor.  
    17.45   Disembarked.  
    18.32   Anchored Anchorage 3.  
           
    28.03.45 "Horten"    
    07.00   Raised anchor.  
    08.00 SE 1, Sea 0, fog, Vis. 1000 meters, 1011 mb Ordered to conduct deep diving test (depth 2A -10 meters) off Østøy.  
    08.49   Dived.  At depth 2A -20 flange of the flood valve linkage leaking.  G.H.G. (Balkon) turns out very bad.  
        Forward diving plane interferes substantially.  
        Passenger freighter not heard at 800 meters.  
        Cause:  possibly water layering.  
        Diesel air intake duct makes a little water.  Blowing distributor slowly loses pressure.  
    10.07   Surfaced.  Flange of the flood valve was removed.  
           
Sun and Moon Data 24.03.45
Sun and Moon Data 25.03.45
Sun and Moon Data 26.03.45
Sun and Moon Data 27.03.45
Sun and Moon Data 28.03.45
 
- 6 -
 
           
           
           
    continued      
    28.03.45      
    12.30   Ltn.(Ing.) Funke and Ob.Masch on board for follow-up snorkel training.  
    18.30   Instructors disembark.  
    19.16   Anchored Anchorage 3.  
        Fresh provisions loading.  
           
    29.03.45 "Horten"    
    09.30 E 0, Sea 0, mist, Vis. 200 meters, 1008 mb Raised anchor, due to fog planned departure not possible.  
    12.30   Kaptlt.(Ing.) Nietschke with training instructors and specialists aboard.  
        Combat training and execution of G.H.G. repairs.  Repair of the snorkel round antenna noted for Kristiansand, because in Horten it is not possible.  Repairs by specialists reported by secure teletype.   
    18.20   F.d.U. West aboard for farewell of the boat.  
    19.02 - 19.30   Submerged snorkeling measured mile.  
    20.00 AO 1689    
      E 0, Sea 0, 7/10, Vis. 8 nm, 1001 mb    
    20.06   Departed Horten with "U-1107" in accordance with outbound orders.  In Oslo Fjord several short term detections on Borkum.  
    22.35   Abeam "Lille Færder".  
    24.00 AO 4124    
      E 0, Sea 0, clear sky, Vis. 8 nm, 1002 mb    
           
    30.03.45 "Kristiansand"    
    04.00 AO 3386    
      SW 2, Sea 1, overcast/mist, Vis. 3 nm    
    04.42   Beginning of twilight.  
    07.45   Made fast Kristiansand Marviken.  Afternoon deep diving test to depth 2A -20.  Snorkel runddipol antenna operable.  Loaded drinking water.  
    20.00 "Kristiansand" Taken under escort with "U-1107".  
      SW 4, Sea 3, 8/10, Vis. 8 nm, 1002 mb    
    24.00 AN 3535    
      SW 3-4, Sea 3, 2/10, Vis. 10 nm, 1002 mb    
           
    31.03.45 "South of Kristiansand" Switched to night routine.  
    00.30   Escort turned off to starboard and ran into "Manne Fjord" and so passes out of sight.  After a long search with "U-1107" decide to proceed together 30 nm to escort dismissal without escort.  
    04.00 AN 3524 Course 300°.  
      SW 3, Sea 3, 3/10, Vis. 8 nm, 1003 mb    
           
Sun and Moon Data 28.03.45
Sun and Moon Data 29.03.45
Sun and Moon Data 30.03.45
Sun and Moon Data 31.03.45
 
- 7 -
 
           
           
           
    continued      
    31.03.45      
    04.15   Reached "Krieger".  Ship's position exactly fixed by cross bearing.  Dived, came to 240°.  Proceeded submerged at depth 40 meters.  
    05.02   Twilight begins.  
    12.00 AN 3519 Day's run:  55 nm  
           -  "  -      12 nm  
        Total:             67 nm.  
    14.43 - 14.53   Boat ventilated through snorkel with the port diesel, CO - concentration 2.5%.  
        Hull shut-off of the compressed air WC leaks at depth 40 meters, so that water is admitted up to the vent cock.  WC only usable at snorkel depth.  Outer starboard exhaust flap valve leaks heavily.  
    16.00 AN 3542    
    20.00 AN 3544    
    20.10   End of twilight.  
    20.30 SW 6, Sea 4, 0/10, Vis. 10 nm Began Snorkeling.  A perfect Elektra-sonne bearing at 23.16 hours resulted in a difference between dead reckoning and actual position: of 240°T, 7.5 nm.  However, this can not be correlated with soundings.  
    24.00 AN 3462 Presume error of the Elektra-sonne.  Ship's position was already exactly determined.  
      SW 6, Sea 5  
           
    01.04.45 "West of Stavanger"    
    02.30   Snorkeling ended.  Boat can be held only with difficulty and cut under frequently.  
    04.00 AN 3425    
    05.05   Twilight begins.  
    08.00 AN 2424    
    10.05 - 10.12   Snorkeled to ventilate.  Leakage from the hull shut-off valve of the compressed air WC is heavier.  Packing is forced out with a plug.  The tank is constantly under outside pressure.  I decide that with weather improvement to set tight the WC-discharge with diving gear from outside, to include a new valve and packing.  After installation, wood peg is removed again.  
    12.00 AN 3413 Day's run:  Snorkeled 22 nm  
                                      35 nm  
                              Total:    57 nm.  
    16.00 AN 3178    
    19.00   After consulting with the Engineering Officer it appears replacing the hull-valve at sea in the prevailing weather is too dangerous.  Come to northerly course to run to Stavanger.   
    20.00 AN 3177    
      WSW 5, Sea 4, blue sky    
    20.22   End of twilight.  
    20.33   Began snorkeling.  
    23.00   Difference between dead reckoning and actual position:  131°T, 4 nm.  
    24.00 AN 4365    
           
    02.04.45 "West of Stavanger"    
    00.57   Snorkeling ended.  
    04.00 AN 4362    
    05.05   Course change to 60°.  
    12.00   Day's run:  Snorkeled: 19.5 nm  
                                      39.5 nm  
                                        17.0 nm  
        Total:                          66.0 nm.    [typo should be 76.0]  
           
Sun and Moon Data 31.03.45
Sun and Moon Data 01.04.45
Sun and Moon Data 02.04.45
 
- 8 -
 
           
           
           
    continued      
    02.04.45      
    14.19   Outgoing Radio Message 1130/2/k55:  F.d.U. West:  Have lost packing from hull valve.  Running to Stavanger.  Position at "Sveinane" today at 20.00 hours.  
                                                    "U-1305"  
    13.50   Surfaced.  Rod antenna on the direction finder loop is broken.  
    16.00 AN 2989 COnvoy cruise from "Sveinane" with M-boat.  
      WSW 3, Sea 2, 2/10, Vis. 10 nm Course 85°.  
    15.24   Warning shot by 15 cm battery on land.  After agreement by searchlight transit continued.  Recognition cartridge 7 gave incorrect stars.  Suppose failure due to moisture.  
    18.42   Made fast Stavanger alongside M-boat.  
           
    03.04.45 "Stavanger"    
        Shipyard day in Stavanger.  
        Hull valve of the WC removed and ground in.  Pressure oil renewed due to water contamination.  Rod antenna leak flanged.  
           
    04.04.45 "Stavanger"    
    10.25 - 11.30   Deep diving test.  Radio direction finder leaked, the flange leaked.   
    11.45   Made fast at fuel oil pier to load.  
    20.00 Stavanger Ready for sea.  Taken in convoy by M-boat to "Sveinane".  
      W 2, Sea 1-2, blue sky, Vis. 15 nm, 1008 mb Course 273°.  
    20.36   Beginning of twilight.  
    21.53   Dived.  Went to depth A -40 meters.  
    22.45   Began snorkeling.  After passing "Skudesnes Fjord" continuous detection on Borkum gear.  Suspect land stations.  
    24.00 AN 2989    
           
    05.04.45 "West of Stavanger"    
    01.58   Snorkeling ended.  Proceeding submerged at depth A -40 meters.  
    04.00 AN 2979    
    05.49   Twilight begins.  
    08.00 AN 2978    
    12.00 AN 2977 Day's run:                15.5 nm  
                          Snorkeled  16.5 nm  
                                          18.2 nm  
                              Total:      50.2 nm.  
    15.20   Distant saw sounds and weak depth charge series ahead. With periscope extension discovered, that control valve piston jammed.   Periscope cannot be extended.  In 8 hours work attack periscope control valve removed and exchanged with the air search periscope. Cause: foreign body in the pressure oil.  
    16.00 AN 2899 Distant depth charge series.  
    17.18   Surfaced, to tighten the fittings of the pressure oil cylinder of the snorkel mast which causes constant chirping sounds.  
    20.00 AN 2899    
      W 1, Sea 1, 2/10, Vis. 15 nm    
           
Sun and Moon Data 02.04.45
Sun and Moon Data 03.04.45
Sun and Moon Data 04.04.45
Sun and Moon Data 05.04.45
 
- 9 -
 
           
           
           
    continued      
    05.04.45      
    21.29   End of twilight.  
    21.45   5 distant depth charges.  
    22.25   Began snorkeling.  
    24.00 AN 2889    
      W 1, Sea 1    
           
    06.04.45 "West of Stavanger"    
    00.47   Difference between dead reckoning and actual position:  60°T, 10.5 nm.  
    02.07   Snorkeling ended.  
    04.00 AN 2884    
    05.56   Beginning of twilight.  
    08.00 AN 2876    
    12.00 AN 2875 Day's run:  Snorkeled  14.8 nm  
      NE 1, Sea 1, blue sky, Vis. 15 nm                                 34.0 nm  
                          Total:      48.8 nm.  
    13.30   Boat ventilated by snorkel.  
        G.H.G. has strong noise interference in the forward sector, malfunction eliminated by replacing an amplifier tube.  
    16.00 AN 2874    
      NE 1, Sea 1, blue sky, Vis. 15 nm    
    20.00 AN 2796    
    21.51   End of twilight.  
    22.19   Beginning of snorkeling.  
    23.19   Detection on Borkum.  Went to 20 meters because of the glassy sea and heavy marine phosphorescence.  Sound sweeps every half-hour.  
    24.00 AN 2794    
           
    07.04.45 70 nm East of "Fair Island"    
    00.40   Difference between dead reckoning and actual position: +0 nm from Elektra-sonne.  
    01.25   Detection; was probably not detected; no searchlight use.  
    03.35   Snorkeling ended.  
    04.00 AN 2784    
    05.59   Beginning of twilight.  
    08.00 AN 2776    
    12.00 AN 2775 Day's run:  Snorkeled  27.3 nm  
                                        24.0 nm  
                            Total:      51.3 nm.  
    13.20 - 13.35   Boat ventilated.  
    14.00   Course change to 292°.  
    16.00 AN 2774    
    18.45 - 21.00   Half-hourly distant depth charge series of 5 charges each.  
    20.00 AN 2695    
    22.00   End of twilight.  
    22.50   Began snorkeling.  Half-hourly sound sweeps.  
    24.00 AN 2691    
           
    08.04.45 East of "Fair Island"    
    00.30   Difference between dead reckoning and actual position:  292°T, 3 nm.  
    03.20   Luminous effect abeam to starboard.  Probably lamp of an aircraft.  
    03.50   Snorkeling ended.  (1 hour of charging.)  
    04.00 AN 2646    
    06.00   Beginning of twilight.  
           
           
Sun and Moon Data 05.04.45
Sun and Moon Data 06.04.45
Sun and Moon Data 07.04.45
Sun and Moon Data 08.04.45
 
- 10 -
 
           
           
           
    continued      
    08.04.45      
    08.00 AN 2645    
    12.00   Day's run:                29.1 nm  
                        Snorkeled  28.0 nm  
                           Total:      57.1 nm.  
    13.15   Boat ventilated.  Detection.  Went to depth 20 meters.   
    13.28   While ventilating detection and aircraft sighting bearing 60°T, 2500 meters.  Crash dive.  Went to depth A.  Not identified, because up to the cutting under of the periscope the aircraft remained at target angle green 30°.  No aircraft bombs.  Ventilating shifted to charging time.  
    16.00 AN 2641    
    20.00 AN 1642    
    22.00   End of twilight.  
    23.00   Began snorkeling.  During snorkeling continuous detection volume 3-4.  Apparently a land device.  Recurrence 21 seconds.  After passing the narrows strength decreases.  
    23.20   Difference between dead reckoning and actual position: +0 nm.  Half-hourly sound sweeps.  
    23.46   Incoming Radio Message 1821/8k 80:  
        "U-1055" and "Christiansen" on 9 April 08.00 hours switch "Diana" Circuit.  
                                                    F.d.U.-West  
    24.00 AN 1461    
      SW 3, Sea 3, 8/10    
           
    09.04.45 West of "Fair Island"    
    04.00 AN 1427 Snorkeling ended.  
    05.55   Beginning of twilight.  
    08.00 AN 1419    
    12.00 AN 1418 Day's run:                  33.8 nm  
      N 1, Sea 1, swell, 3/10, Vis. 3 nm                  Snorkeled   26.0 nm  
                           Total:      59.8 nm.  
    13.10 - 13.25   Boat ventilated.  
    16.00 AN 1414    
    20.00 AN 1334    
    22.20   End of twilight.  
    22.52   Began snorkeling.  
    23.05 Sonne 1 and 100-meter line Difference between dead reckoning and actual position:  280°T, 5 nm.  
    24.00 AN 1334 Course 270°.  
           
    10.04.45 20 nm West of "Fair Island"    
    02.37   Crash dive for steamer with set navigation lights, distance 150 meters, bearing 20°T, turned away hard.  Went to depth A -20 meters.  No defense.  Propeller sounds are lost bearing 250°T.  
    03.30   Continued snorkeling.  1/2-hour.  Ran off on course 330°.  
    04.00 AN 1326    
    04.44   Crash dive for searchlight ahead to starboard.  Probably an aircraft.  No detection.  Snorkeling ended, because the battery is full anyway.  
    05.59   Beginning of twilight.  
    08.00 AN 1316    
           
Sun and Moon Data 08.04.45
Sun and Moon Data 09.04.45
Sun and Moon Data 10.04.45
 
- 11 -
 
           
           
           
    continued      
    10.04.45      
    01.15 - 01.30   Ventilated the boat.  
    12.00 AN 1315 Day's run:                23.5 nm  
                       Snorkeled   31.4 nm  
                           Total:      54.9 nm.  
    16.00 AN 1314    
    19.40   Passed the 200-meter line  
    20.00 AM 3436    
    22.00   Heavy detonation to starboard.  Suspect mine.  
    22.04   End of twilight.  
    23.00   Beginning of snorkeling.  
    24.00 AM 3426    
      E 6, Sea 5, dark    
           
    11.04.45 North of the "Hebrides"    
    00.28   Course change to 300°, because the boat can not be held at snorkeling depth.  
    02.30   Came to course 250°.  
    03.03   Snorkeling ended.  
    04.00 AM 3422 Heavy propeller sounds ahead to starboard.  
    06.13   Beginning of twilight.  
    08.00 AM 3422    
    12.00 AM 3416 Day's run:                 29.0 nm  
      E 6, Sea 4, 8/10, Vis. 10 nm                  Snorkeled  32.6 nm  
                            Total:      61.6 nm.  
        Course 250°, difference between dead reckoning and actual position: 0°T, 5 nm.  
    13.00   Boat ventilated.  Lubricating oil pump ruptured at the elbow.  
    15.15   Snorkeling to ventilate with welding in the control room.  
    15.24   To depth 20 meters due to detection.  
    15.30   Continued snorkeling and welding work.  Despite the heavy sea the boat can be held well with the seas from port astern.  
    16.00 AM 3414    
      ESE 6, Sea 5, 4/10, Vis. good    
    16.08   Work and snorkeling ended.  
    20.00 AM 3336    
    22.17   End of twilight.  
    23.08   Began snorkeling.  
    24.00 AM 3335    
      E 6, Sea 5    
           
    12.04.45 North of the "Hebrides"    
    03.10   Difference between dead reckoning and actual position: 300°T, 13 nm.  
    03.15   Snorkeling ended.  Course change to 220°.  
    04.00 AM 3316    
    08.00 AM 3315    
    12.00 AM 3317 Day's run:                 35.0 nm  
      E 7, Sea 6, 9/10, Vis. 12 nm                  Snorkeled   21.0 nm  
                             Total:      56.0 nm.  
        Course 220°.  
           
           
Sun and Moon Data 10.04.45
Sun and Moon Data 11.04.45
Sun and Moon Data 12.04.45
 
- 12 -
 
           
           
           
    continued      
    12.04.45      
    11.00 - 12.40   Due to failure of "Goliath" proceeded at periscope depth.  Both E-motors HF.  Boat can not be held at KF.  
        "Nauen" bad reception.  
    12.45   Boat ventilated.  
    16.00 AM 3311    
    20.00 AM 2466    
    22.28   End of twilight.  
    23.00   Began snorkeling.  
    24.00 AM 2482 During the last day the forward diving plane has made strong sounds, suspect in the thrust bearing.  
      E 3, Sea 4, swells, Vis. good  
           
    13.04.45 Northwest of the "Hebrides"    
    04.00 AM 2612    
    05.58   Snorkeling ended (200 Amperes, 149 Volts).  
    06.16   Beginning of twilight.  
    08.00 AM 2615    
    12.00 AM 2617 Day's run:                 29.5 nm  
                         Snorkeled   38.4 nm  
                             Total:      67.9 nm.  
    14.28   Boat ventilated.  
    15.50 - 16.10   Went to depth 16 meters.  (Program time)  
    16.00 AM 2617    
      SE 6, Sea 5-6, 9/10, Vis. good    
    16.50   Diesel sounds bearing 280°T.  Went to periscope depth.  Nothing seen.  Sounds continue to be heard at volume 2.  A snorkeling boat?  
    17.10   Went to depth A -20 meters, because at KF drive setting the boat can not be held at periscope depth and there were no visual bearings.  
    18.00   Asdic and diesel sounds ahead to port, initially astern, then shifting ahead.  Depth A +20 meters.  Impulse rate greatly changing (60-110).  Not identified.  After 2 hours nothing further heard.  
    20.00 AM 2563    
    22.30   End of twilight.  
    24.00 AM 2565    
           
    14.04.45 West of the "Hebrides"    
    00.30   Difference between dead reckoning and actual position:  182°T, 16 nm  
        Began snorkeling.  1/2 hour ran on course 270°.  
    03.10   Snorkel alarm due to water in fuel oil.  
    04.00 AM 2722 Snorkeling continued.  
      SE 4, Sea 3, 6/10, Vis. heavily changing    
    05.10   Snorkeling ended.  
    06.20   Beginning of twilight.  
    08.00 AM 2724    
    12.00 AM 2727 Day's run:                29.5 nm  
                       Snorkeled   38.0 nm  
                           Total:      67.5 nm.  
    15.50   Boat ventilated.  (Program time).  
    16.00 AM 2719 Sounds of the forward diving planes are considerably louder.  Examination showed wear of the outer spindle due to grease being forced out which  
           
Sun and Moon Data 12.04.45
Sun and Moon Data 13.04.45
Sun and Moon Data 14.04.45
 
- 13 -
 
           
           
           
    continued      
    14.05.45      
        gets warm with heavy use.  Small steel pieces were in the oil.  Suppose destruction of a ball of the bearing.  Renewal with on board means very bad.  Spare bearing not on board.  
    20.00 AM 2743    
    23.03   End of twilight.  
    24.00 AM 2745 Began snorkeling.  Course change 30° to starboard, boat can be held relatively well in the beam sea.  
      SSE 8, Sea 6, 5/10  
        Difference between dead reckoning and actual position:  110°T, 5 nm.  
           
    15.04.45 Northwest of "Ireland"    
    01.14   Incoming Radio Message Officer-Only Paula 1915/14d72:  
        Assignment of square AM 5297 as operations area.  
    03.45   Snorkeling ended.  Came to old course.  
    04.00 AM 1896    
    08.00 AM 1899    
    12.00 AM 1898 Day's run:                32.5 nm  
                       Snorkeled   19.8 nm  
                           Total:      52.3 nm.  
    16.00 AM 0131    
    17.30   Course change to 131°.  Boat ventilated.  
    20.00 AM 0134 Course 130°.  
    23.05   End of twilight.  Began snorkeling.  
    24.00 AM 0129    
           
    16.04.45 Northwest of "Ireland"    
    00.25   Crash dive for searchlight astern.  Probably a low flier, distance about 4000 meters.  Went to depth A -10 meters.  Course changed.  No bombs.  No detection on Borkum.  
    01.45   Both compressors are out of service.  
    04.00 AM 2973 Snorkeling ended.  
    04.27   Surfaced to send passing report and clean out.  
    04.36   Outgoing ßß:  Square AM 29.  Weak defenses and surveillance.   
                                                                 "U-1305".  
        Was not heard by Control.  
    04.42   Dived, went to depth A -20 meters.  
    06.25   Beginning of twilight.  
    08.00 AM 2981    
    12.00 AM 2982 Day's run:                34.3 nm  
                       Snorkeled   25.0 nm  
                           Total:      59.3 nm.  
    16.00 AM 2986    
      S 5, Sea 4, 3/10, Vis. good    
    16.25   Began snorkeling, because both compressors are in service again and the compressed air inventory is very low.  
    17.30   Program time.  
    20.00 AM 2986 Snorkeling ended.  
    22.58   End of twilight.  
    24.00 AM 2997 Began snorkeling.  
      S 3, Sea 2-3, 8/10    
           
    17.04.45 Northwest of "Ireland"    
    00.30   Difference between dead reckoning and actual position: 0°T, 5 nm.  
    03.20   Snorkeling ended.  
           
           
           
Sun and Moon Data 14.04.45
Sun and Moon Data 15.04.45
Sun and Moon Data 16.04.45
Sun and Moon Data 17.04.45
 
- 14 -
 
           
           
           
    continued      
    17.04.45      
    03.30   Surfaced for a new attempt to send passing report.  
    03.37   Outgoing ßß:  Position AM 29.  Weak defenses and surveillance.   
        Short signal was sent on alternate frequency; was not acknowledged by headquarters.  
    03.43   Dived.  Went to depth A -20 meters.  
    04.00 AM 5131 Pressure oil installation has some malfunctions, caused by the penetration of salt water at beginning of the patrol. Control valves and end position cut off switch jam.  The smallest rust particles are in the circulating oil.  Malfunctions can be removed for a short time by removing and cleaning.  
    06.26   Beginning of twilight.  
    08.00 AM 5135    
    12.00 AM 5139 Day's run:                35.8 nm  
      SSW 5, Sea 4, overcast, hazy                Snorkeled   19.0 nm  
                           Total:      54.8 nm.  
    12.37 - 12.50   Boat ventilated.  
    16.00 AM 5217    
    20.00 AM 5242    
    22.54   End of twilight.  
        I decide to make no attempt to send the Radio Message a third time, because the boat is already too close to the operations area, and the prospect of success is slight, evidently the antenna duct is flooded.  
    24.00 AM 5242    
           
    18.04.45 North of Ireland    
    00.40   Location by direction finder bearings "Tory Island" and "Eagle".  Radio beacons as in peacetime.  Bearings while snorkeling very feasible; briefly came to 10 meters.  
    00.45   Difference between dead reckoning and actual position: 81°T, 24 nm.  
        Supercharger of the charging diesel out of service; inspection hatch of the pressure part of the supercharger torn approximately 30 cm. Continued charging at low RPM.  
    04.00 AM 5296    
    05.00   During sound sweep strong propeller sounds ahead which also stop shortly afterwards.  No searchlight use.  Went to depth A -55 meters.  Continued to monitor.  Course change to 270°.  
    08.00 AM 5298 At various depths back and forth in the operations area and listened.  No traffic detected.  
    12.00 AM 5297 Day's run:                19.2 nm  
      SW 2, Sea 2, long swell, hazy                Snorkeled   26.0 nm  
                           Total:      45.2 nm.  
    13.20   Heavy detonation to starboard.  Suspect scare bomb.  At periscope depth.  Nothing seen.  
    14.42   Course 180°.  Boat ventilated.  Afterwards steered for the bottom for execution of welding work on the starboard super charger.  At depth A -20 still felt swells.  Balkon GHG is completely unusable on the bottom, because scraping sounds drown out every sound bearing.  Pressure oil installation has a lot of malfunctions.  Foreign bodies constantly in the oil.  
    16.00 AM 5297 Occasional detonations at long range.  Boat put on the bottom for the execution of welding work lasting several hours.  Depth A +15 meters.  
           
Sun and Moon Data 17.04.45
Sun and Moon Data 18.04.45
 
- 15 -
 
           
           
           
    continued      
    18.04.45      
    20.00 AM 5297 Boat raised from the bottom, ventilated.  
      SW 0-1, swells, hazy    
    22.57   End of twilight.  Absolutely no traffic observed.  Because the operations area square was gived to a depth of 40 nm, intend to proceed off "Tory Island" to observe traffic.  
    24.00 AM 5297    
      Wind 0, swell, fog    
           
    19.04.45 North of "Tory Island"    
    00.15   Began snorkeling.  Snorkeling will become much more difficult, because moon is in the 1st quarter and the sea very flat.  Radio beacon bearings provide ship's position perfectly.  
        Difference between dead reckoning and actual position: 125°T, 7 nm.  
    02.21   "Tory Island" lighthouse in sight.  Snorkeling with one side driving and one side pure charging to avoid foam streaks.  
    04.00 AM 5614 Snorkeling ended.  Boat put on the bottom at the beginning of lightness.  
    06.27   Beginning of twilight.  Came to periscope depth.  Ship's position determined by cross bearings.  During the day alternating at periscope depth and other depths to listen.  Absolutely no traffic.  Mirror flat sea.  
    12.00 AM 5614 Day's run:                18.3 nm  
      Wind 0, Sea 0, swell, 7/10                 Snorkeled  18.0 nm  
                           Total:      36.3 nm.  
        Afternoon alternating at periscope depth and depth 30 meters.  No visual or sound bearings.  
    16.00 AM 5614    
    18.25   Fighter bomber astern to starboard.  Course east.  Quickly went to depth 40 meters.  Remained unnoticed.  
    20.00 AM 5613    
    23.15   Began snorkeling without drive diesel.  Crash dive for detection.  After 10 minutes without interruption continued snorkeling.  
    24.00 AM 5613    
           
    20.04.45 Operations area    
    03.45   Snorkeling ended.  Headed for the bottom at the beginning of brightness.  Balkon GHG is of little use on the bottom, because with the low sea state noise sounds drown everything.  
    04.00 AM 5376    
    06.16   Beginning of twilight.  
    08.00 AM 5376 After rising from the bottom went to periscope depth on course 180°.  I decide, to observed the waters off "Tory Island" by day, if no traffic is detected to go on course 90° towards "Malin Head", because the area appears favorable as a traffic junction  
      N 3, Sea 1, overcast, rain showers  
    12.00 AM 5379 Day's run:                21.4 nm  
                        Snorkeled  10.0 nm  
                           Total:      31.4 nm.  
    13.45   Quickly went to depth A -40 meters for a "Sunderland".  Aircraft appeared suddenly out of the clouds, course south, distance 1500 meters.  Was not seen in spite of the raised snorkel mast (boat was ready to ventilate).  After 10 minutes to periscope depth, boat ventilated.  
           
Sun and Moon Data 18.04.45
Sun and Moon Data 19.04.45
Sun and Moon Data 20.04.45
 
- 16 -
 
           
           
           
    continued      
    20.04.45      
    14.35   Course change to 90°.  
    16.00 AM 5616    
    18.05   Propeller sounds bearing 65°T.  To Action Stations!  Nothing seen in the direction of the sound bearings.  With a periscope sweep a destroyer coming out of the sun glare from the opposite direction of the sound bearing.  Distance 1200 meters.  
    18.42 AM 5624 2-fan Lut from tube I and III on destroyer.   
        Target speed = 15 knots; range = 900 meters; target angle 100°; enemy length 100 meters.  
        Long loops, Lut velocity green 10°, lead angle 12°, impact angle green 80°.  MZ on.  
        1.  Detonation after 9 minutes 19 seconds.  
        2.          "           :     9 minutes 22 seconds.  
        No hit effects observed, because after shooting went to depth A -30 meters.  Sinking sounds detected in the GHG.  No defense.  
    18.57   At periscope depth.  Nothing further seen of destroyer.  Floating wreckage not observed.  Continuous propeller sounds bearing 220°T.  At periscope depth ran off in the opposite direction;  no visual bearings.  
    20.00 AM 5621    
    21.45   Came to course 0°, to run off from the shooting location.  
    22.54   End of twilight.  
    24.00 AM 5387    
      N 2, Sea 2, 6/10, Vis. clear    
           
    21.04.45 "Malin Head"    
    00.28   Began snorkeling.  Went to the north for 2 hours, then headed for "Malin Head".  
    04.00 AM 5389    
    05.08   Snorkeling ended.  
    06.14   Beginning of twilight.  On changing course back and forth in position between "Malin Head" and "Inishtrahull".  
    08.00 AM 5631    
    12.00 AM 5626 Day's run:                 30.4 nm  
      N 4, Sea 2, 2/10, Vis. good                 Snorkeled   24.0 nm  
                            Total:      54.4 nm.  
    14.25   16 depth charge detonations at long range.   
    15.10   Saw sounds bearing 110°T in the GHG.  To Action Stations!  Came to periscope depth.  Nothing detected in the periscope.  
    15.35   Saw sounds fade away.  
        Secured from Action Stations.  
    16.00 AM 5623 Lying at 30 meters seems to be a favorable sound depth.  
    20.00 AM 5622    
    22.55   End of twilight.  
    23.15   Began snorkeling.  Attempt to snorkel without driving diesel, fails because of too much swell. Bright foam tracks (full moon) must be accepted.  
    24.00 AM 5623    
           
Sun and Moon Data 20.04.45
Sun and Moon Data 21.04.45
 
- 17 -
 
           
           
           
           
    22.04.45 "Inishtrahull"    
    03.50   Snorkeling ended.  
        Set off to the north and again returned, so that at dawn the boat is positioned at "Inishtrahull"-"Malin Head".  
    04.00 AM 5632    
      N 3, Sea 2, 2/10, Vis. clear    
    06.07   Beginning of twilight.  
    07.20 - 08.20   Passed close between "Malin Head" and "Inishtrahull".  
        In the course of this, scraping sounds and bangs in boat close by.  No explosive detection, because several blows in quick succession.  
    08.00 AM 5631 Back and forth in position on changing courses south of "Inishtrahull".  Occasional saw and propeller noises in the GHG.  No visual bearings.  Heavy banging outside of the conning tower.  Aircraft passed 1000 meters abeam.  Was not sighted.  
      NNW 3, Sea 2, 2/10, Vis. good  
    12.00 AM 5633 Day's run:                24.2 nm  
                       Snorkeled   17.0 nm  
                           Total:      41.2 nm.  
    14.40   Attempt to head for bottom fails due to the current.   Navigation difficult because of the current.  Good bearing objects: "Inishtrahull" and lookout tower "Malin Head ".  
    16.00 AM 5633 Occasional detonations at medium range.  Probably scare depth charges.  Nothing seen in the periscope.  
    22.30   Began snorkeling despite the lightness, because current runs heavily in the shallows.  Snorkeling always undisturbed.  Crash dive for [radar] detection.  Suspect land gear on "Inishtrahull".  Impulse series  changing (2-4 beats/sec).  Continued snorkeling undisturbed.  
    22.56   End of twilight.  
    23.05   8 to 10 dark red light phenomena abeam to starboard in square AM 6412.  (on the water surface burning phosphorous?)  
    24.00 AM 5631 Set off 15 nm from land, to be able to surface.  Knocking in the conning tower may come from net deflector part or a broken net deflector.  
      N 3, Sea 2, bright moonshine, Vis. good  
           
    23.04.45 "Inishtrahull"    
    03.16   Snorkeling ended.  
    03.30   At short notice surfaced.  Sounds seems to be caused by lubricating tubes, because nothing else can be determined.  
    03.47 AM 5622 Dived, went to depth A -40 meters.  
    08.00 AM 5621 For the whole day depth charge series each 8-9 depth charges at long range.  Time gaps between the series approximately 1-1/2 hours.   Sound sweeps at different depths.  No sound or visual bearings.  
    12.00 AM 5613 Day's run:                23.2 nm  
      NE 2, Sea 1, lightly cloudy, hazy                 Snorkeled   26.0 nm  
                          Total:      49.2 nm.  
    16.00 AM 5613    
    17.00, 17.30, 17.40, 18.23, 21.00 Each 8-9 depth charges.  Seem to lie ahead to starboard.  Perhaps forerunners of a convoy from the west.  Continued on  
           
           
           
Sun and Moon Data 22.04.45
Sun and Moon Data 23.04.45
 
- 18 -
 
           
           
           
    continued      
    23.04.45      
        course 170°, to come close by "Tory Island".  
    20.00 AM 5631    
    23.10   Began snorkeling.  Depth charge detonations no longer heard.  
    24.00 AM 5632 Snorkeling in the bright moonshine and flat sea is questionable.  Yet continued night snorkeling, to be able to go just off the coast during the day.  
      NE 1, Sea 1, Vis. clear  
           
    24.04.45 "Tory Island"    
    01.15   With sound sweep circular saw detected bearing 245°T.  Volume 1.  Suspect, traffic that is routed inside "Tory Island".  Intend, to go between "Tory Island" and the mainland by day.  
    02.55   Snorkeling ended.  
    04.00 AM 5632    
    06.02

 

Beginning of twilight.  
    07.15   Sound bearing 140°T.  At periscope depth.  No visual bearing.  During the whole day continuous sound bearings at volume 3.  Every time went to periscope depth.  No visual bearings.  (Small fishing trawlers off the coast?  Rocky coast possibly works as a reflector hence the loud volume).  
    08.00 AM 5632    
      N 1, Sea 0, Vis. good    
    12.00 AM 5616 Day's run:                32.0 nm  
                        Snorkeled  25.0 nm  
                           Total:      57.0 nm.  
    14.15   Sound bearing, quickly shifting.  Fishing trawler target angle 130°, distance 1500 meters.  To Action Stations.  Did not shoot, because a larger freighter sighted from "Bloody Foreland".   Approach complicated, because of the mirror flat sea.  
    14.44 AM 5616 2-fan Lut from tube I and IV.  Depth 4 meters, target speed 8 knots, target angle left 80°, range 800 meters, enemy length 100 meters.  
        Long loops, Lut velocity 12 knots, red 5°, impact angle red 90°, lead angle 11°, 16°.  MZ on.  
        2 detonations after 18 seconds and after 8 minutes 15 seconds.  After shooting went to depth 30 meters.  After second detonation went to periscope depth.  Steamer (about 3000 GRT) sunk.  Lifeboats and rafts with wreckage at sinking location.  
        Snorkeled away from the shooting location to the north.  No defense, except for locating (land gear).  
    16.00 AM 5616    
      N 2, Sea 1, hazy    
    19.32   Snorkeling and charging ended.  Boat loses air from bottle group 1.  Headed for the bottom to reload, depth A -10 meters.  Bottle group 1 closed off.  
    20.00 AM 5384    
    22.59   End of twilight.  
    23.05   Boat raised from the bottom.  Saw sounds volume 4 bearing 120°T.  
    24.00 AM 5381    
           
    25.04.45 Operations area    
    00.11   Snorkeling cruise, large day's run used for high charging  
           
Sun and Moon Data 23.04.45
Sun and Moon Data 24.04.45
Sun and Moon Data 25.04.45
 
- 19 -
 
           
           
           
    continued      
    25.04.45      
        (200 Amperes, 149 volts) and air compressing.  Short term detections.  Continued snorkeling undisturbed.  Air supply had dropped to 65 kgs due to a leak in bottle group 1.  
    04.00 AM 5269 Snorkeling ended.  Boat positioned 40 nm away from the shooting location.  Surfaced to transmit Radio Message, because our presence is known.  Was not heard by headquarters.  
    04.52   Crash dive for searchlight ahead to port.  Propeller sounds.  To Action Stations.  Intend to shot T 5 by the air search periscope.  After initially approaching the enemy turns away again.  
    05.47   Secured from Action Stations.  
    08.00 AM 5292    
    12.00 AM 5294 Day's run:                20.0 nm  
                       Snorkeled   43.5 nm  
                           Total:      63.5 nm.  
        Continuous propeller sounds at various volumes.  Nothing seen in the periscope.  Very good sound conditions.  From previous experience, volume in the GHG gives no indication of range.  Propeller sounds were heard shortly before yesterday's shot at range 7500 meters at the same volume as with the current sound bearings with no visual observation.  
    12.15   To Action Stations!  
        Patrol vessel from astern with a "Liberator" flying overhead, distance 3000 - 3500 meters.  Turned off immediately and presented target angle 180°.  Afterwards no further sound bearings.  
    12.33   Secured from Action Stations.  Had the intention of appearing perhaps by surprise off "Islay" or to visit old hunting ground to detect traffic again.  Occasional sound bearings.  Nothing seen in the periscope.  
    16.15 - 17.00   Quickly shifting diesel sounds astern to starboard to ahead to starboard.  Nothing seen.  Can only be from a snorkeling boat.  Own course 100°.  
    17.20   Boat ventilated.  
    20.00 AM 5292    
      NE 3, Sea 2, Vis. good    
    21.45   Sudden propeller sounds with roaring saw sounds directly over the boat.  To Action Stations!  Sounds shift directly ahead.  At periscope depth a patrol vessel, distance about 2500 meters running off at high speed.  No other vessels.  Remained at periscope depth, to watch for the return of the patrol vessel.  
    22.15   Secured from Action Stations.  Went to depth A -60 meters.  
    23.02   End of twilight.  
    24.00 AM 5293    
           
    26.04.45 "Operations area"    
    00.42   Began snorkeling.  With occasional detection continued snorkeling undisturbed, at steady detection crash dive for 15 minutes at depth 20 meters.  With  
           
Sun and Moon Data 25.04.45
Sun and Moon Data 26.04.45
 
- 20 -
 
           
           
           
    continued      
    26.04.45      
        course 90° searched old area again.  
    04.00 AM 5387 Good ship's position by cross bearings "Fanad Point" and "Inishtrahull".  Further bearing possibilities offered by day "Muckish Mountain".  
      N 1, Sea 1, overcast  
    05.18   Snorkeling ended.  Because of continual sound bearings, intend to remain for some time in the operations area. Positioned between "Inishtrahull" and mine barrier back and forth on courses of 0° and 180°.   Very good sound conditions.  Propeller sounds volume 2 and saw sounds volume 4 in various directions.  No visual bearings.  
    05.57   Beginning of twilight.  
    12.00 AM 5397 Day's run:               19.0 nm  
                       Snorkeled   20.0 nm  
                           Total:      39.0 nm.  
    15.35   Boat ventilated.  While doing so, crash dive for flying boat (Sunderland), distance 2500 meters.  Remained unnoticed.  Occasional distant aircraft bomb detonations and bangs near the boat.  Back and forth on courses of 0° and 180° northwest of "Inishtrahull".  Absolutely no traffic observed.  After the approach of two land-based aircraft went to depth 20 meters.  Shortly thereafter clapping noises heard perhaps emitted from sound buoys?  
    16.00 AM 5397    
      WNW 2, Sea 2, rain showers.    
    18.45   After sound bearings went to periscope depth.  Nothing observed.  
    20.00 AM 5631    
    22.50   Diesel sounds bearing 45°T.  To Action Stations!  Nothing observed in air search periscope.  
    23.04   End of twilight.  
    23.55   Began snorkeling.  
    24.00 AM 5397    
           
    27.04.45 "Inishtrahull"    
    01.15   Crash dive for steady tone.  Probably land gear at "Inishtrahull", which was frequently observed before.  
    04.00 AM 5397    
    04.15   Snorkeling ended.  
    05.55   Beginning of twilight.  
    08.00 AM 5398 By day further sound bearings in different directions.  Nothing seen in the periscope.  
    12.00 AM 5398 Day's run:                22.0 nm  
                        Snorkeled   17.0 nm  
                            Total:      39.0 nm.  
    16.00 AM 5397 Boat ventilated.  I decide to advance to the other side of the Channel and to monitor the area west of "Islay", because recently frequent saw sounds could be heard in northeast direction.  
      NNE 7, Sea 5, rain showers  
    20.00 AM 5389    
    23.04   Began snorkeling.  
    23.10   End of twilight.  
    24.00 AM 5388    
           
    28.04.45 "North Channel"    
        While snorkeling frequent weak detections.  Continued snorkeling undisturbed.  
           
Sun and Moon Data 26.04.45
Sun and Moon Data 27.04.45
Sun and Moon Data 28.04.45
 
- 21 -
 
           
           
           
    continued      
    28.04.45      
    00.38   Came to course 45°.  
    03.35   Snorkeling ended.  Transit at depth A -50 meters.  
    04.00 AM 5392    
    05.51   Beginning of twilight.  
    08.00 AM 5369    
    12.00 AM 6144 Day's run:                26.0 nm  
      NNW 5, Sea 4, Vis. good                 Snorkeled   22.0 nm  
                           Total:      48.0 nm.  
    12.30   Very loud thinning saw sounds bearing 315°T.  At periscope depth sighted a smoke trail.  
    12.44   To Action Stations!  2 escort vessels in line abreast about 300 meters apart.  Bow right target angle 10°, distance 5000 meters.  2-fan Lut prepared because of circular saw.  Enemy zigzags to range = 2500 meters to bow left target angle 20° and afterwards to bow left target angle 90°.  Switched to tube I (reversal shot).  
    13.01 AM 6147 Reversal shot from tube I.  
        Steering NS; depth 4 meters; MZ on.  
        Target speed 8 knots; target angle bow left 130°; range = 1800 meters.  Missed.  
        Intend to wait for the return of the corvettes whose saws were have already been detected now and then during the last days in the GHG.  
    16.00 AM 6144 Boat ventilated.  If the wind and rough sea continue, snorkeling will become very difficult.  While ventilating steady detection, probably from land gear on "Islay".  The rough ground swell of the North Channel becomes apparent.  Boat rolls heavily at depth A -50 meters.  In the prevailing north storm the reappearance of the search group can not be expected.  Awaiting better weather.  
      NNW 6, Sea 4  
    20.00 AM 5366    
      NNW 10, Sea 7, 4/10, rain showers    
    23.08   End of twilight.  
    23.45   Beginning snorkeling.  Snorkeling is possible with the seas abeam; however, during sound sweeps the boat cuts under or comes free completely, so that only by filling the negative buoyancy tanks can it be kept submerged.   Air supply thereby compromised.  Believe snorkeling without sound sweeps with this weather is not dangerous.  
    24.00 AM 5365 With frequent detections continued snorkeling undisturbed.  
           
    29.04.45 West of "Islay"    
    04.00 AM 6144 Snorkeling back and forth on course 250° and 70°.  
      N 7, Sea 5, rain showers    
    04.33   Snorkeling ended.  Lighthouse on "Dubh Urtach" seen twice.  Identification as in peacetime.  
    05.49   Begining of twilight.  
    08.00 AM 6191 Navigation is very difficult in the heavy current.  Sailing handbook shows current strength up to 8 knots.  
      N 5, Sea 4, rain showers  
    12.00 AM 6142 Day's run:               23.0 nm  
                       Snorkeled  26.0 nm  
                           Total:      49.0 nm.  
        In the GHG no more sound bearings were detected since yesterday at midday.  Shipping seems to be completely stopped in the bad weather.  
    16.00 AM 6142 Intend to advance to the "Barra Passage".  
      N 5, Sea 3-4, Vis. good    
           
           
           
Sun and Moon Data 28.04.45
Sun and Moon Data 29.04.45
 
- 22 -
 
           
           
           
    continued      
    29.04.45      
    17.35   Began snorkeling.  Snorkeling by day, because of the full moon; favorable sea state.  
    20.00 AM 5361    
    21.00   Snorkeling ended.  Diesel compressor out of service.   
    23.00   Began snorkeling.  
    23.10 AM 5334 End of twilight.  
      N 3, Sea 2, rain showers    
           
    30.04.45 "South of the Hebrides"    
    00.30   "Skerryvore" abeam to starboard.  
    02.05   Snorkeling ended.  
    04.00 AM 5331    
    05.45   Twilight begins.  
    08.00 AM 3985    
    12.00 AM 3983 Day's run:               19.0 nm  
                       Snorkeled   32.0 nm  
                           Total:      51.0 nm.  
        Loud saw sounds heard with the naked ear in the boat.  Mastheads and smoke stack of a patrol vessel bearing 200°T, course 270°.  
    12.15   To Action Stations!  Patrol vessel runs out of sight.  On course 70° ran toward 6 mastheads off "Tiree" which when close turn out to be the transmitter masts of a Radio Station. Had gone deep several times before this "Marauder". Remained unnoticed.  Saw sounds to starboard increase in volume.  
    16.00 AM 3986    
      N 3, Sea 2, sunshine, hazy    
    17.15   To Action Stations!  Escort boat (EYRET -class?).  Target angle 0°, every 2 minutes zig zagged about 60-70° with circular saw.  Northeasterly general course.  
    17.27 AM 3994 2-fan Lut from tubes II and III, depth 4, MZ on.  
        Shooting data:  Target speed 7; target angle red 90°; range = 800 meters; enemy length 100 meters; long legs; Lut velocity red 10 knots, red 5 knots, impact angle red 75°, lead angle 17°.  
        After shooting went to depth A -40 meters.  Heavy detonation followed by cracking after 9 minutes 51 seconds.  Suspect looping hit.  At periscope depth.  Nothing seen.  No defense.  Intend to snorkel away from the shooting location, to foil the heavy air patrol.  Ran off at depth A -50 to the south, to search the old area again.  
    20.00 AM 3994    
      N 3, Sea 2-3, cloudy    
    23.00   Began snorkeling.  
    23.14   End of twilight.  
    24.00 AM 3988    
           
    01.05.45 "Skerryvore Passage"    
    01.30   Crash dive for searchlight ahead.  Just prior weak detection.  In the GHG nothing detected; probably an aircraft.  Snorkeling ended.  
    03.45   Diesel compressor again in service.  
    04.00 AM 5338    
    05.43   Beginning of twilight.  
    08.00 AM 5338    
      N 2, Sea 2, Vis. good    
           
Sun and Moon Data 29.04.45
Sun and Moon Data 30.04.45
Sun and Moon Data 01.05.45
 
- 23 -
 
           
           
           
    continued      
    01.05.45      
    12.00 AM 5337 Day's run:               18.0 nm  
                       Snorkeled   20.0 nm  
                           Total:      38.0 nm.  
        Propeller sounds Volume 3 bearing 30°T, increasing quickly.  
    12.15   To Action Stations!   
        4 destroyers (2 smokestacks) in line abreast, without saws, slow speed, distance from ship to ship about 300 meters.  Unfortunately only a T V is ready forward.  
    12.24 AM 5337 Reversal shot from tube IV.  Missed.  
        Shooting data:  target velocity 12 knots; bow right target angle 70°; range 1000 meters.  Steering WS.  Depth 4 meters; torpedo speed = 24.5 kots; MZ on.  
        Destroyers overlapping at the shot on both sides.  Water depth 42 meters.  Intention not to make any more reversal shots in water depth under A +20 meters.  Approach was unnoticed.  After shot went to depth A -20 meters.  In the afternoon continuous patrol vessel traffic with saws bearing 120 to 180°T.  In the periscope only mastheads and smokestacks were seen.  
    16.00 AM 5363    
    18.00 - 21.00   Continuous scare depth charges at medium to long range.  No sound bearings except for circular saws.  
    20.00 AM 5362    
      N 2, Sea 2, Vis. good    
    23.00   Began snorkeling.  Strong detection and with sound sweep propeller sounds up to volume 3.  Not identified.  
    23.16   End of twilight.  
    24.00 AM 5367    
           
    02.05.45 "North of Inishtrahull"    
    01.25   Crash dive for light beam ahead.  30 minutes later snorkeling continued.  
    02.36   Incoming Radio Message 0201/02/d 53:  
        To all boats:  
        On the 30th of April the Führer has fallen with his soldiers in the heroic battle for Germany in Berlin.  By his order Großadmiral Dönitz has taken over the succession.  The order of the day of the Großadmiral follows.  The battle of our people goes on.  
    03.20   Snorkeling ended.  Boat put on the bottom at depth A -20 meters.  Mustered the crew in the bow room for announcement.  
    04.00 AM 5397    
    07.00   Boat raised from the bottom.  Near "Inishtrahull" frequent double detonations close by the boat, sound like explosive location. Time interval between 2 bangs approximately 1 second.  
    08.00 AM 5397    
    12.00 AM 5394 Day's run:                17.0 nm  
      N 2, Sea 1-2, hazy, cloudy                 Snorkeled   19.0 nm  
                           Total:      36.0 nm.  
        State of health of the crew is good except for Ob.Masch. Kühnemund who suffers greatly from rheumatism.  Bed rest with heating pad and warm water bag provides temporary relief.  
           
Sun and Moon Data 01.05.45
Sun and Moon Data 02.05.45
 
- 24 -
 
           
           
           
    continued      
    02.05.45      
    16.00 AM 5386 Went deep for approaching 4-engined bomber.  Shortly afterwards sounds heard in the boat, as if objects were striking the water surface.  Possibly throwing of detection buoys?  
    19.15   Several aircraft bomb detonations, some particularly violent, in northwesterly direction.  
    20.00 AM 5386    
      N 1, Sea 1, Vis. good    
    23.10   Began snorkeling.  
    23.19   End of twilight.  
    24.00 AM 5385    
           
    03.05.45 "North of Tory"    
        Had hoped to get missing Serial Number "d26" of 25 April, finally gave up.  
    02.50   Snorkeling ended.  Boat put on the bottom in square AM 5374 at depth A +10 meters.  
    03.10   Announcement of the Großadmiral's order of the day.  
    04.00 AM 5374    
    05.39   Beginning of twilight.  
    08.00 AM 5374    
      NE 2, Sea 2, lightly cloudy, Vis. good    
    08.50   Saw sounds volume 3, building immediately.  Boat raised from the bottom.  At periscope depth nothing observed.  
    12.00 AM 5378 Day's run:               21.0 nm  
      NE 1, Sea 0, long swells, clear                Snorkeled   19.0 nm  
                           Total:      40.0 nm.  
        Depth charges at hourly intervals. Saw sounds volume 2-3 in northerly direction.  Beyond periscope visual range.  
    16.00 AM 5299 Searched on westerly courses in the operations area between the 100 and 200-meter line.  Patrol vessels with saw and Asdic at the 100-meter line, an aircraft circling overhead.  Asdic impulses very irregular (1-8 impulses each second, constantly changing).  Ran toward patrol vessel.  Afterwards nothing further seen or heard.  Otherwise no traffic detected.  
      Wind calm, sunshine  
    20.00 AM 5297    
    23.21   End of twilight.  
    24.00 AM 5297 Began snorkeling.  
      Mirror flat sea, long swells, starry clear night    
           
    04.05.45 "Northern part of the operations area"  
    03.06   Crash dive for searchlight, from port side snorkel head illuminated.  Alarm was given during sound sweep, no sound bearings.  Probably a stopped patrol vessel or an aircraft.  Quickly went to depth A meters; silent speed.  No depth charges, no propeller sounds.  Continued transit at depth A meters, because charging had ended.  
    04.00 AM 5285    
    05.36   Beginning of twilight.  
        At periscope depth "Catalina" at about 4000 meters over the crash dive location, observed circling for 1/2 hour.  
           
           
Sun and Moon Data 02.05.45
Sun and Moon Data 03.05.45
Sun and Moon Data 04.05.45
 
- 25 -
 
           
           
           
    continued      
    04.05.45      
    08.00 AM 5282    
      SW 1, Sea 0, long swells, blue sky    
    12.00 AM 5258 Day's run:                22.0 nm  
                       Snorkeled   17.0 nm  
                           Total:      39.0 nm.  
        Because provisions outfitting was intended for up to 25 May, I decide to start the return transit.  Then with normal return transit duration still 5-6-day's provisions remain for hoped for attack opportunities in deep water for which I still have both stern T V's.  If to . . .  
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
Sun and Moon Data 04.05.45


Note: the remaining pages of the KTB are hand written and difficult to make out.  The handwritten KTB starts on 2 May at 16.00 hours and so far as can be determined, matches the overlapping typed version.

- 45 -
 
           
           
           
    continued      
    02.05.45      
        State of health of the crew is good except for Ob.Masch. Kühnemund who suffers greatly from rheumatism.  Bed rest with heating pad and warm water bag provides temporary relief.  
    16.00 AM 5386 Went deep for approaching 4-engined bomber.  Shortly afterwards sounds heard in the boat, as if bodies were striking the water surface.  Possibly throwing of detection buoys?  
    19.15   Several aircraft bomb detonations, some particularly violent, in northwesterly direction.  
    20.00 AM 5386    
      N 1, Sea 1, Vis. good    
    23.10   Began snorkeling.  
    23.19   End of twilight.  
    24.00 AM 5385    
           
    03.05.45 "North of Tory"    
        Had hoped to get missing Serial Number "d26" of 25 April, finally gave up.  
    02.50   Snorkeling ended.  Boat put on the bottom in square AM 5374 at depth A +10 meters.  
    03.10   Announcement of the Großadmiral's order of the day.  
    04.00 AM 5374    
    05.39   Beginning of twilight.  
    08.00 AM 5374    
      NE 2, Sea 2, lightly cloudy, Vis. good    
    08.50   Saw sounds volume 3, building immediately.  Boat raised from the bottom.  At periscope depth nothing observed.  
           
           
           
Sun and Moon Data 02.05.45
Sun and Moon Data 03.05.45
 
- 46 -
 
           
           
           
    continued      
    03.05.45      
    12.00 AM 5378 Day's run:               21.0 nm  
      NE 1, Sea 0, long swells, clear                Snorkeled   19.0 nm  
                           Total:      40.0 nm.  
        Distant depth charges to the south.  Saw sounds volume 2-3 in northerly direction.  Beyond periscope visual range.  
    16.00 AM 5299 Searched on westerly courses in the operations area between the 100 and 200-meter line.  Patrol vessels with saw and Asdic at the 100-meter line, an aircraft circling overhead.  Asdic impulse very irregular (1-8 impulses each second, continuously [illegible word]).  Ran toward patrol vessel.  Afterwards nothing further seen or heard.  Otherwise no traffic detected.  
      Wind calm, sunshine  
    20.00 AM 5298    
    23.21   End of twilight.  
    24.00 AM 5297 Began snorkeling.  
      Mirror flat sea, long swells, starry clear night    
           
    04.05.45 "Northern part of the operations area"  
    03.06   Crash dive for searchlight, from port side snorkel head illuminated.  Alarm was given during sound sweep, no sound bearings.  Probably a stopped patrol vessel or an aircraft.  Quickly went to depth A meters; silent speed.  No depth charges, no propeller sounds.  Continued transit at depth A meters, because charging had ended.  
    04.00 AM 5285    
    05.36   Beginning of twilight.  
        At periscope depth "Catalina" at about 4000 meters over the crash dive location, observed circling for 1/2 hour.  
           
           
           
Sun and Moon Data 03.05.45
Sun and Moon Data 04.05.45
 
- 47 -
 
           
           
           
    continued      
    04.05.45      
    08.00 AM 5282    
      SW 1, Sea 0, long swells, blue sky    
    12.00 AM 5258 Day's run:               22.0 nm  
                      Snorkeled   17.0 nm  
                           Total:      39.0 nm.  
        Because provisions outfitting was intended for up to 25 May, I decide to start the return transit.  Then with normal return transit duration still 5-6-day's provisions remain for hoped for attack opportunities in deep water for which I still have both stern T V's.  If to . . .  
    16.00 AM 5258    
    17.00 S 1, Sea 0, blue sky Course 303°.  
    20.00 AM 5255    
    23.00   [illegible entry]  
    23.24   End of twilight.  
    24.00 AM 5255    
      SE 2, Sea 1, sky clear Course 303°.  
           
           
           
           
           
           
           
           
           
           
           
           
           
Sun and Moon Data 04.05.45
 
- 48 -
 
           
           
           
           
    05.05.45      
    00.30   Difference between dead reckoning and actual position: 300°T, 8 nm.  
        [illegible entry]  
    04.00 AM 5136    
    04.37   [illegible entry]  
    08.00 AM 5135    
    12.00 AM 5131 Day's run:                30.0 nm  
                        Snorkeled   25.0 nm  
                           Total:      55.0 nm.  
    14.15   [illegible few words] for "Liberator", range 4000 meters, went to depth 20 meters.  
    14.30   Boat ventilated.  
    16.00 AM 2998    
      SE 3, Sea 2, [illegible few words]    
    20.00 AM 2994    
    23.25   End of twilight.  
    23.30   Began snorkeling.  
    24.00 AM 2959    
           
    06.05.45 [illegible word] "Rockall"    
    01.10   [illegible entry]  
           
           
           
           
           
           
           
           
Sun and Moon Data 05.05.45
Sun and Moon Data 06.05.45
 
- 49 -
 
           
           
           
    continued      
    06.05.45      
    01.40   Snorkeling continued  
    04.00 AM 2927    
    05.27   Beginning of twilight.  
        [illegible entry]  
    08.00 AM 2924    
    12.00 AM 2921 Day's run:                29.0 nm  
                       Snorkeled   19.0 nm  
                           Total:      48.0 nm.  
    15.00 - 16.30   Boat ventilated (Program time).  
    15.45   Incoming Radio Message 1433/5/d 70:  
       

[illegible 6 words] Kriegsmarine, Luftwaffe and Waffen SS [illegible 6 words].

 
    15.36   Incoming Radio Message 1558/5/d 71:  
        All boats:  
        1.)  SKL orders for all:  
        Immediately cease war against English and Americans.  
        2)  Order [illegible 2 words]  Radio Message 1614/4/d 66:  M-Officer [illegible 2 words].  
    16.00 AM 2784    
      E 0-1, Sea 1, cloudy mist    
    19.00   [illegible entry]  
    20.00 AM 2781    
    23.00   Began snorkeling, Program time.  
        [illegible entry]  
    23.55   End of twilight.  
           
           
           
           
           
           
Sun and Moon Data 06.05.45
 
- 50 -
 
           
           
           
    continued      
    06.05.45      
    24.00 AM 2757    
      E 7, [illegible few words]    
           
    07.05.45 [illegible word] Hebrides    
    02.42   Snorkeling ended.  
        [illegible entry]  
    04.00 AM 2761    
      E 0-1, Sea 0-1, blue sky    
    04.45 - 05.48   [illegible entry]  
    08.00 AM 37    
    09.00 - 10.40   Boat ventilated (Program time).  
        [illegible entry]  
    11.00   [illegible word] Incoming Radio Message 1614/4/d66:  
        Officer "Karl".  
    12.00   Day's run:                   27 nm  
                         Snorkeled    33 nm  
                             Total:      60 nm.  
    14.35   [illegible entry]  
    16.00 AM 2733    
    16.30   [illegible entry]  
           
           
           
           
           
           
           
           
           
           
Sun and Moon Data 06.05.45
Sun and Moon Data 07.05.45
 
- 51 -
 
           
           
           
    continued      
    07.05.45      
    20.00 AM 2677    
    23.50   Began snorkeling.  
    23.55   End of twilight.  
    24.00 AM 2477    
           
    08.05.45 [illegible word] Hebrides    
    02.15   Difference between dead reckoning and actual position: 270°T, 19 nm  
        Course changed to 60°.  
    02.32   Snorkeling ended.  
    04.00 AM 2615 Course 60°.  
    05.16   Beginning of twilight.  
    05.00 - 05.45   Boat ventilated (Program time).  
    08.00 AM 2616    
    12.00 AM 2621 Day's run:               31.0 nm  
                       Snorkeled   22.0 nm  
                           Total:      53.0 nm.  
    16.00 AM 2488    
      SSE 3, Sea 2, [illegible two words]    
    20.00 AM 2489    
           
           
           
           
           
           
           
           
           
Sun and Moon Data 07.05.45
Sun and Moon Data 08.05.45

Appendices to U-1305's KTB - click on the text at left to proceed to the documents
Sketch Combat sketches
Excerpt Excerpt of KTB from 10 - 11 December 1944 - Tactical training exercise in the central Baltic


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