Nummer: 21715
| Area : | Baltic Sea |
| Sea area : | Gulf of Finland |
| Date of attack : | 24.12.1944 |
| Time of attack : | 09:28 |
| Nationality of U-boat : | German |
| U-boat : | U 637 |
| Commander : | Riekeberg |
| Grid : | AO 3547 |
| presumed target type : | Patrol Craft |
| presumed result : | sunk |
| Number of torpedoes/mines : | 3+1 |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | unknown |
| Date of observation : | 24.12.1944 |
| Time of observation : | 12:10 |
| Nationality of target : | Soviet |
| Actual type of target : | Patrol Craft |
| Name of target : | BMO-594 Baltiets |
| Year of launch : | 1944 |
| Actual tonnage : | 39 ts |
| Actual result : | sunk |
| Position of target : | Cape Pakri |
| Footnote : | U-637 attacked with a 3-torpedo spread (FAT) at 9:28 a.m. and heard a detonation after 3:44 min and sinking noises. At 9:49 a T5 missed its target. At 10:09 a.m. a T5 is followed by a detonation after 3:00 min and sinking noises. |
| Convoy : | unknown |
| updated on: | 08.12.2018 |
| Remark: | ZEIT, TZ, WAFFE |
| Changes: | 1) Beckers, 9.1996 2) Zwei Datensätze reduziert auf einen. Siehe Fussnote 3) 09u28 3-FAT ; 09h49 1 T-5 |