Nummer: 17802a
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 11.02.1944 |
| Time of attack : | 00:11 |
| Nationality of U-boat : | German |
| U-boat : | U 731 |
| Commander : | Keller |
| Grid : | BE 2964 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 5000 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | OS.67 |
| Footnote : | U-731 fired a spread and assumed two hits on a steamer, and heard a gnat detonation after 2:30 min. |
| related attacks : | Angriff 1 |
| Convoy : | OS.67 |
| Route of convoy : | London / Liverpool - Freetown (Sierra Leone) |
| Remark to convoy : | Since Jul 1941, from Apr 1943 combined with KMS in Atlantic (counter traffic = SL) |