Nummer: 21303
| Area : | Arctic Ocean |
| Sea area : | North Norway |
| Date of attack : | 22.04.1945 |
| Time of attack : | 02:45 |
| Nationality of U-boat : | German |
| U-boat : | U 481 |
| Commander : | Andersen |
| Grid : | AC 8499 |
| presumed target type : | Steam Freighter |
| presumed result : | damaged |
| Used weapon(s) : | Torpedo with gyro-angle and zig-zaggig course |
| Convoy : | PK.9 |
| Date of observation : | 22.04.1945 |
| Time of observation : | 06:18 |
| Nationality of target : | Soviet |
| Actual type of target : | Destroyer |
| Name of target : | Karl Libknekht |
| Year of launch : | 1916 |
| Actual tonnage : | 1399 ts |
| Actual result : | target visibly missed |
| Footnote : | U-481 fired a spraed of three LUT and heard two detonations, which were observed by the Soviet destroyers "Karl Libknekht" and "Derzhkii". |
| Convoy : | PK.9 |
| Route of convoy : | Petsamo / Kirkenes - Kola Fjord (soviet) |
| Remark to convoy : | Since Nov 1944, annual new numbering (counter traffic = KP) |