Nummer: 20413
| Area : | Arctic Ocean |
| Sea area : | North Norway |
| Date of attack : | 26.01.1944 |
| Time of attack : | 02:40 |
| Nationality of U-boat : | German |
| U-boat : | U 957 |
| Commander : | Schaar |
| Grid : | AC 4543 |
| presumed target type : | Tanker |
| presumed tonnage : | 7000 BRT |
| presumed result : | damaged |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Convoy : | JW.56A |
| Actual tonnage : | ---- -- |
| Actual result : | hit not ascertained |
| Footnote : | U-957 heard one Gnat end-of-run detonation after 13:35 min and observed a ship burning. |
| Convoy : | JW.56A |
| Route of convoy : | Loch Ewe - (Iceland) - Kola Fjord - (Arkhangelsk) |
| Remark to convoy : | Since Dec 1942, former PQ (counter traffic = RA) |