Nummer: 20501
| Area : | Arctic Ocean |
| Date of attack : | 30.01.1944 |
| Time of attack : | 06:28 |
| Nationality of U-boat : | German |
| U-boat : | U 313 |
| Commander : | Schweiger |
| Grid : | AB 6532 |
| presumed target type : | Destroyer |
| presumed result : | sunk |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Convoy : | JW.56B |
| Actual tonnage : | ---- -- |
| Actual result : | hit not ascertained |
| Footnote : | U-313 heard a Gnat detonation after a run-time of 8 min. |
| Convoy : | JW.56B |
| Route of convoy : | Loch Ewe - (Iceland) - Kola Fjord - (Arkhangelsk) |
| Remark to convoy : | Since Dec 1942, former PQ (counter traffic = RA) |