Nummer: 21405
| Area : | Baltic Sea |
| Sea area : | Baltic West Coast |
| Date of attack : | 23.06.1941 |
| Time of attack : | 06:54 |
| Nationality of U-boat : | German |
| U-boat : | U 144 |
| Commander : | Mittelstaedt |
| Grid : | AO 6486 |
| presumed target type : | Submarine |
| presumed tonnage : | 206 ts |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 23.06.1941 |
| Time of observation : | 07:37 |
| Nationality of target : | Soviet |
| Actual type of target : | Submarine |
| Name of target : | M-78 |
| Year of launch : | 1935 |
| Actual tonnage : | 161 ts |
| Actual result : | sunk |
| Position of target : | 57.28n 21.17e |