Ref:        TR/PG/14050/NID
 
 
 
 
 
 
 
 
 
"("U 2326") UNTERNEHMUNG (KRIEGSTAGEBUCH) 4.5.45 - 12.5.45"
 
 
 
 
 
 
(U-2326) OPERATION (WAR LOG) 4.5.45 - 12.5.45
 
 
 
 
 
 
 
 
 
 
                The following translation is promulgated for information.
 
 
 
 
2.             All inquiries relating to it should be addressed to the Director of Naval Intelligence quoting the reference number given above.
 
 
 
 
 
 
 
 
                                                                                             (Sgd.)  CLIVE LOEHNIA
 
 
                                                                                                            for D.N.I.
 
     
 
                                                                                                       3 0  JUL  1945
 
 
 
     
     
     
 
 
 
NID 12A/NS/P/598.
 
 
 
 
 
 
 
 
 

 

 
 
 
 
 
- 1 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
    2.  Operation  
       
4.5.45 0040 STAVANGER Departure for 2. War Cruise.
    Wind 1-2  
    Sea 0  
    Rain  
    Visibility 4000 m.  
       
  0116 AUSAVIKI BIGHT Picked up escort.
       
  0314 SVEINANE light Dropped escort.
       
  0323   Dived and proceeded submerged.
       
  0400 Sq. AN 2997 A - 30.
       
  0800 Sq. AN 2988 A - 30.
       
  1200 Sq. AN 3116 ) Day's run:
                          ) surfaced:      11 miles
  1600 Sq. AN 3142 ) submerged:  30 miles
          Total:       41 miles.
       
  1710 Sq. AN 3142 2 strange explosions resembling heavy artillery.
       
  1823 Sq AN 3144 Boat ventilated through SCHNORCHEL.
       
  1900 Sq. AN 3144 Another explosion, neither a/c bomb nor depth charge.
       
  2000 Sq. AN 3144 A - 30.
       
  2140 Sq. AN 4369 Twilight begins.
       
  2310 Sq. AN 4392 Battery charged by means of SCHNORCHEL.  No W/T routine heard on short wave.
       
  2358   All-round listening.
 
 
 
 
 

 

 
 
 
 
 
- 2 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
5.5.45 0000 Sq. AN 4392 At SCHNORCHEL depth, charging batteries.
       
  0002   All-round listening concluded.  Diesel started for charging.
       
  0058   All-round listening.
       
  0109   All-round listening concluded.  Battery still being charged.
       
  0147   All-round listening at 30 m.
       
  0320   Charging concluded.
       
  0400 Sq. AN 4394  
       
  0412   Diesel shut off, battery charged, went to A - 30.
       
  0425   Dawn begins.
       
  0800 Sq.  AN 4623  
       
  1200 Sq. AN 4621 Day's run:
    Wind:  1 Surfaced:      -
    Sea:    1 Submerged:  76.6 s.m.
    Cloud:  C 7     Total:       76.6 s.m.
    Visibility:  4-5 s.m.  
       
  1600 Sq. AN 4612 A - 30.
       
  1922   Boat ventilated through Schnorchel.
       
  2000 Sq. AN 4536 A - 30.
       
  2200   Twilight begins
       
  2251   Battery charged by SCHNORCHEL.
 
 
 
 
 

 

 
 
 
 
 
- 3 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
6.5.45 0000 Sq. AN 4561 SCHNORCHEL depth.
      No reception of W/T routine.
       
  0005   All-round listening, and battery charging by SCHNORCHEL.
       
  0105   All-round listening.
      Food eaten at A - 40.
       
  0158   Battery charging by SCHNORCHEL.
       
  0300   Battery charging concluded.
       
  0305   No "Elecktra Sonne" picked up.
       
  0317   At A - 30.
       
  0400 Sq. AN 4555 A - 30.
       
  0432   Dawn begins.
       
  0800 Sq. AN 4549 A - 30.
       
  1200 Sq. AN 4574 Day's run:
    Wind: 1-2 Surfaced:      -
    Sea:    1 Submerged:  87.8 s.m.
    Cloudy, C5 Total:            87.8 s.m.
    Visibility 5 s.m.  
       
  1600 Sq.  AN 4498 A - 30.
       
  1759   Boat ventilated through SCHNORCHEL.
       
  2000 Sq. AN 4723  
       
  2153   Twilight begins.
       
  2246   Battery charged through SCHNORCHEL.
       
  2348   All-round listening.
       
  2352   All-round listening concluded, battery charged.
 
 
 
 
 

 

 
 
 
 
 
- 4 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
7.5.45 0000 Sq. AN 4722  
       
  0104   Charging concluded.
      Torpedoes withdrawn and balanced at 30 m.
       
  0400 Sq. AN 4712  
       
  0445   Dawn begins.
       
  0800 Sq. AN 0133 A - 30.
       
  1139 Sq. AN 0131 Boat ventilated through SCHNORCHEL.
    Visibility 100 m.  
       
  1200 Sq. AN 0131 Day's run:
      Surfaced:      -
      Submerged:  83.3 s.m.
          Total:       83.3 s.m.
       
  1205 Sq. AN 0131 Took boat to bottom, as have obtained no fix
    Wind:  0 since leaving base.  Will await better
    Sea:    0-1 visibility.  Circular saw ((Kreiasäge)) heard
    Visibility:  100 m. at very long range.
       
  1230 Sq.  AN 0131 Circular saw, very loud, heard throughout the ship without apparatus.
       
  1435   Boat taken off the bottom.  Hydrophone bearing 3300.  True course = 2400.  Turned towards it, nothing to be observed.
       
  1535   Periscope depth.
      Hydrophone bearing 200, fading to Stbd., nothing seen.
 
 
 
 
 

 

 
 
 
 
 
- 5 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
7.5.45 1600 Sq. AN 0123 Went to 30 m, and swept ((ablaufen)) in the
    Wind:  0 direction of the bearing on course of 2800.
    Sea:     0 - 1  
    Visibility:  6000 m.  
       
  1702   Boat touched bottom.
       
  1716   Went to 195, headed for GIRDLE NESS, in order to obtain a fix.
      Position calculated in AN 0126.
      Bearings:
      GIRDLE NESS        =  true
      BANNER MILL      =  true
      SOUTH BREAKWATER LIGHT =  true
      MIDDLE BUOY      =  true.
       
  2000 Sq. AN 0126 Went to 30 m.  As no further activity to be
    Wind:    0 - 1 expected, headed South.
    Sea:      0 - 1  
    Visibility:  5000 m.  
       
  2203   Twilight begins.
       
  2256 Sq. AN 0129 Hydrophone bearing 2200.
      = 400 true
      Moving away ahead.
       
  2320   Nothing to be seen at periscope depth.
      Hydrophone bearing on 2450 = 650 true.
      Signal strength, 3-4, W/T routine.
       
  2336   Battery charged by SCHNORCHEL.  No W/T reception.
       
  2344   Alarm!  Steam ship with lights on, bearing 2750 = 950 true.
      Kept boat at periscope depth.
 
 
 
 
 

 

 
 
 
 
 
- 6 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
8.5.45. 0000 Sq. AN 0153 Steamship apparently turned eastwards.  No visual or hydrophone bearings.
       
  0009   Diesels started for charging.
       
  0030 Visibility 50 m.  Observations through periscope impossible
    Heavy fog owing to heavy fog.  All-round listening.
       
  0034   All-round listening ended, battery charged.
       
  0100   All-round listening.
       
  0107   8 depth charges.  Hardly a tremor.
       
  0121   Battery charged through SCHNORCHEL.
       
  0200   All-round listening; charging concluded.
       
  0210   Proceeded southwards along the convoy route A - 45.
       
  0400 Sq. AN 0159 Noise floats heard throughout boat.
       
  0446   Dawn begins.
       
  0800 Sq. AN 0185  
       
  1003 Wind S.E.1 Boat ventilated through SCHNORCHEL.
    Sea:  0 - 1 Impossible to fix position.
    Visibility 50 m.  
 
 
 
 
 

 

 
 
 
 
 
- 7 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
8.5.45 1200 Sq. AN 5112 Day's Run:
    Wind:  0 surfaced:      -
    Sea:    0 - 1 submerged:  72.3 Sm.
    Visibility:  100 m.      Total:      72.3 Sm.
       
      Impossible to fix position owing to bad visibility.
       
  1600 Sq. AN 5144  
    Wind:  SSE  1-2  
    Sea:    1  
    Visibility:  50 m.  
       
  1612 Visibility 100 m. Battery charged through SCHNORCHEL.
       
  1640   Visibility 30 m.
      Schnorchel ing broken off.
       
  1650   2 vessels, probably frigates passed over the boat which was lying at 30 metres, without noticing it.
       
  1720   Went to the bottom, 58 m.
       
  1933   Boat taken off the bottom.
       
  2000 Sq. AN 5117  
       
  2014   Approximate position fix on a position line AN 5117.
       
  2035   Hydrophone bearing at 2450 = 1550 true.  I turned 180 and headed towards it.  Visibility for a short while 800 - 1000 m.
 
 
 
 
 

 

 
 
 
 
 
- 8 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
8.5.45 2102   Steamship turned off toward the convoy route.  I turned onto the attack course - 2520.
      Visibility at the most 50 m.
       
  2113 Visibility 50 - 100 m. In spite of good hydrophone bearings, I did not press the attack, as firing was impossible in such visibility.
       
  2125   Boat taken to bottom.
       
9.5.45 0000 AN 5117 Boat on bottom.  Depth 58 m.
       
  0212 AN 5117 Boat taken off bottom.
       
  0235 AN 5117 Surfaced in order to ventilate the boat,
    Wind:  SSE 2 made off to the East.  No W/T reception.
    Sea:  1 - 2  
    Visibility: 2000 m.  
    dark night.  
       
  0309   Dived.
       
  0320   Went to bottom.
       
  0400 AN 5117 Depth 59 m.
       
  0452   Dawn begins.
       
  0610 AN 5117 In spite of loud noise from 2 noise-floats, hydrophone bearing at 3160 = 2500 true.
       
  0627   Boat raised from bottom.
       
  0647   Destroyer passed over boat, lying at 18 m.  High speed to periscope depth.  Destroyer painted white, inclination 1800, course South.
 
 
 
 
 

 

 
 
 
 
 
- 9 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
9.5.45. 0705 AN 5117 Proceeding along the convoy route on course
    SSE 1 200.  Destroyer on port side bearing 3000 =
    Sea:  0 - 1 3200 true, another on starboard side bearing
    Visibility: 400 = 600 true.
    800 - 1000 m. Fog. Distance from each, 600 m. course along the convoy route to the South.  At action stations.
       
  0710 AN 5117 1 steamship approaching, inclination, 0.
    SSE 1 I turned to starboard to 175; failed to get in
    Sea:  0 - 1 even an angled shot at this ship - a tanker of
    Visibility: 3000 G.R.T.  Enemy's speed; 12 knots. 
    800 - 1000, fog. Passed 200 m. to starboard.
       
  0715   Not worthwhile firing at coastal passenger ship of 300 tons.
       
  0718   Corvette on port quarter bearing 1100 - 500 true, starboard bow inclination 300.  Distance 600 m. Course south.
       
  0723   Corvette bearing 1500 = 100 true, inclination 0, distance 800 m.
 
 
 
 
 

 

 
 
 
 
 
- 10 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
9.5.45. 0725   Corvette held course towards me, I went quickly to 40 m.  It ran over me from astern on the starboard side to ahead on the port side without noticing me.
       
  0800 AN 5117 Boat passed underneath a noise float.
    SSE 2  
    Sea:  1  
    Visibility:  1000 m.  
       
  0845   At periscope depth.  Nothing seen.  Various hydrophone bearings, noise-floats, and the corvette heading away South.
       
  1200 AN 5117 Day's run:
    SSE 2 Surfaced:      -
    Sea:  1 Submerged:  42.2 Sm.
    Visibility:  3000 m.     Total:        42.2 Sm.
    misty.  
      At periscope depth.  No visual observation.
       
  1330 SSE 2 Buoy 22H in AN 5117 ahead.
    Sea:  1 Head south, looking for traffic, which uses
    Visibility:  2000 m. only one route N & S.
    Misty.  
 
 
 
 
 

 

 
 
 
 
 
- 11 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
9.5.45 1332 - 1342   Boat ventilated through SCHNORCHEL.
       
  1445 Visibility:  2000 m. No visual bearing.
    misty. Hydrophone bearings astern, probably from noise floats.
       
  1600 AN 5141  
       
  1805 AN 5143 Visual bearings
    SSE 2 - 3 ANBS HEAD:  1400 True
    Sea:  2 BASS ROCK:  2500 True
    Visibility:  15 Sm.  
       
  1815   Proceed on course 380 to the boundary of the declared area, so as to Schnorchel in twilight, and surfaced at 2300 to take W/T routine.  No W/T since departure, and no German news.  It is uncannily quiet, in contrast to the first operation.
       
  2000 AN 5143  
       
  2115   Periscope depth.  News from STAVANGER on the all-round DIPOL.
      Norwegian announcer.
      News for the German armed forces in Norway.  U-boats to proceed surfaced to German reception harbours.
 
 
 
 
 

 

 
 
 
 
 
- 12 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
9.5.45. 2115   Unconditional surrender is accepted.
       
  2204   Twilight begins.
       
  2248   All clear for surfacing!
       
  2258   Surfaced.  Charged!
       
  2318   Air alarm.
       
  2325   Boat on bottom.
       
10.5.45. 0000 AN 5112  
       
  0041   Boat raised from bottom
       
  0058   Surfaced.
       
  0105   Battery charged on the surface.
       
  0258   Lying abreast of BELLROCK about 1 - 1-1/2 miles to the east of the convoy route.  A large convoy - 8 steamships and 4 escort allowed to pass to port.
      Parts of P/L W/T messages from B.d.U.Ops. received.  Text partly mutilated or missing, as the aerials were swamped by the sea.
      Favorable opportunity for firing allowed to pass.
 
 
 
 
 

 

 
 
 
 
 
- 13 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
10.5.45 0258   Owing to confused situation, continue northwards in order to make off eastwards, submerged from AN 0131 and await further orders in the open North Sea.
       
  0358   On the port quarter, bearing 1900 = 2000 true, a modern tanker of about 10000 - 12000 G.R.T. in sight.  Escort destroyer 100 metres away on starboard side.
       
  0400 AN 0188  
       
  0450   Destroyer turned towards me.  Distance 300 m.  As situation still not clear, gave alarm!
      Altered round = 1800  Asdic!
      Rapid pulse sequence, not picked up.
       
  0502   Went to 00.  Continued Northwards.
 
 
 
 
 

 

 
 
 
 
 
- 14 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
10.5.45. 0800 AN 0159  
       
  1200 AN 0137 Day's run:
      Surfaced:      32.0 Sm.
      Submerged:  45.0 Sm.
              Total:    77.0 Sm.
       
  1600 AN 1898  
       
  1659   Boat ventilated through SCHNORCHEL.
       
  1708   At A - 30, 900.
       
  2000 AN 4712  
       
  2208   Twilight begins.
       
11.5.45. 0000 AN 4721  
       
  0015   Surfaced, charging batteries.
       
  0106   The first W/T messages arrive, some of them incomplete.
       
  0400 AN 4731  
       
  0427   Dawn begins.
       
  0800 AN 4812 Transmitter unserviceable.
       
  1200 AN 4832 Days run:
      surfaced:      88.0 Sm.
      submerged:  54.0 Sm.
             Total:  142.0 Sm.
       
  1220   Boat approached by a "FORTRESS"
 
 
 
 
 

 

 
 
 
 
 
- 15 -
 
 
 
   

Place

 Incidents
Day
Time
 Weather  
       
11.5.45 1220   Visual signal.  "Request your number".  Replied giving boat's No.  Proceeded eastwards, intending to reach KIEL.
       
  1600 AN 4921  
       
  1848   A "LIBERATOR" morsed:
      "Name R K"
      Gave boat's No.
      Reply:  "Am sending ____"
      Could not read following text.
      2 red stars from LIBERATOR and 1 long flash.
       
  1857   Continued passage
       
  2000 AN 4933  
       
  2155   Twilight begins.
       
  2158   Transmitter serviceable, was not heard.
      "KREMPLER MOOR" tuned to 21.4 KHz for intercepting all W/T messages.
       
12.5.45. 0000   0830        1030
      1045        1245