| 02.01.44 | 
          19.16 | 
          ß ß 16.16   | 
        
        
          |   | 
            | 
          Intend to start return transit on the 4th day of the current month. | 
        
        
          |   | 
            | 
                                                                  "U-23"  | 
        
        
          |   | 
            | 
            | 
        
        
          | 04.01.44 | 
          16.06 | 
          ß ß 19.16   | 
        
        
          |   | 
            | 
          Ship has no recognition signals  for sea-air military forces (recognition signals for merchant ships).  | 
        
        
          |   | 
            | 
                                                                  "U-23"  | 
        
        
          |   | 
            | 
            | 
        
        
          | 10.01.44 | 
          06.11 | 
                                                                 23.58/9/x13 | 
        
        
          |   | 
            | 
          U-boat Control:  | 
        
        
          |   | 
            | 
          23.30 hours departure Convoy R 37 and Romanian K-boot from Constanța - Sulina on outside route  | 
        
        
          |   | 
            | 
                                                                  "U-Wahlen" | 
        
        
          |   | 
            | 
            | 
        
        
          | 10.01.44 | 
          16.53 | 
                                                                 16.42/10/x15 | 
        
        
          |   | 
            | 
          U-boat Control:  | 
        
        
          |   | 
            | 
          16.30 hours made fast, 17.00 hours will depart Sulina. | 
        
        
          |   | 
            | 
                                                                  "U-Wahlen" | 
        
        
          |   | 
            | 
            | 
        
        
          | 11.01.44 | 
          09.08 | 
                                                                 06.08/11/x20 | 
        
        
          |   | 
            | 
          U-boat Control:  | 
        
        
          |   | 
            | 
          06.00 hours made fast Galați. | 
        
        
          |   | 
            | 
                                                                  "U-23"  | 
        
        
          |   | 
            | 
            | 
        
        
          | 11.01.44 | 
          18.37 | 
          ß ß 18.37  | 
        
        
          |   | 
            | 
          Intend to start return transit on 15th of the current month. | 
        
        
          |   | 
            | 
                                                                  "U-19" | 
        
        
          |   | 
            | 
            | 
        
        
          | 16.01.44 | 
          20.24 | 
                                                                 19.41/16/x50 | 
        
        
          |   | 
            | 
          Commander U-boats: | 
        
        
          |   | 
            | 
          16.25 hours in square 1359 on  tanker 1500 GRT, loaded, 3 single shots, 1 hit aft 10 meters.  4 escorts.  Depth charges while on the surface.  Target speed 8, target angle left 80°, range 2500 meters, MZ on, calm, light swell, hazy, Vis. 1-2 nm.  | 
        
        
          |   | 
            | 
                                                                  "Grafen" | 
        
        
          |   | 
            | 
            | 
        
        
          | 18.01.44 | 
          19.52 | 
          ß ß 19.53  | 
        
        
          |   | 
            | 
          Intend to begin return transit on 23rd of the current month.  | 
        
        
          |   | 
            | 
                                                                  "U-20" | 
        
        
          |   | 
            | 
            | 
        
        
          | 23.01.44 | 
            | 
          ß ß 00.50  | 
        
        
          |   | 
            | 
          Began return transit Northern Route. | 
        
        
          |   | 
            | 
                                                                  "U-20" | 
        
        
          |   | 
            | 
            | 
        
        
          | 23.01.44 | 
          21.15 | 
                                                                 20.46/23/x24  | 
        
        
          |   | 
            | 
          Commander U-boats:  | 
        
        
          |   | 
            | 
          06.05 hours shore artillery firing naval square 1219, NE-corner.  Sea 0-1, Vis. 1 nm, 1028 mb, 15.5 cbm, 5 torpedoes, position 026.  | 
        
        
          |   | 
            | 
                                                                  "U-24" |