Nummer: 20611
| Area : | Arctic Ocean |
| Date of attack : | 02.04.1944 |
| Time of attack : | 23:38 |
| Nationality of U-boat : | German |
| U-boat : | U 277 |
| Commander : | Lübsen |
| Grid : | AC ---- |
| presumed target type : | Destroyer |
| presumed result : | sunk |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Convoy : | JW.58 |
| Footnote : | U-277 heard two gnat detonations after 2:20 min and 3:18 min. |
| Convoy : | JW.58 |
| Route of convoy : | Loch Ewe - (Iceland) - Kola Fjord - (Arkhangelsk) |
| Remark to convoy : | Since Dec 1942, former PQ (counter traffic = RA) |