Nummer: 20719
| Area : | Arctic Ocean |
| Date of attack : | 30.05.1944 |
| Time of attack : | 20:17 |
| Nationality of U-boat : | German |
| U-boat : | U 957 |
| Commander : | Schaar |
| Grid : | AB 4693 |
| presumed target type : | Destroyer |
| presumed result : | damaged |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Convoy : | Task F. |
| Footnote : | U-957 heard a gnat detonation in a task group after 4:30 min. |
| Convoy : | Task F. |