Nummer: 20902
| Area : | Arctic Ocean |
| Sea area : | Northern Russia |
| Date of attack : | 24.09.1944 |
| Time of attack : | 09:01 |
| Nationality of U-boat : | German |
| U-boat : | U 739 |
| Commander : | Mangold |
| Grid : | AS 2723 |
| presumed target type : | Fleet Minesweeper |
| presumed tonnage : | 600 ts |
| presumed result : | sunk |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Date of observation : | 24.09.1944 |
| Time of observation : | 10:15 |
| Nationality of target : | Soviet |
| Actual type of target : | Fleet Minesweeper |
| Name of target : | T-120 ex Assail |
| Year of launch : | 1942 |
| Actual tonnage : | 625 ts |
| Actual result : | sunk |
| Position of target : | 75.15n 84.30e |
Fleet Minesweeper T-120 ex Assail ex American Assail (AM.147) (bis 1943)