Nummer: 15904
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 17.03.1943 |
| Time of attack : | 23:08 |
| Nationality of U-boat : | German |
| U-boat : | U 305 |
| Commander : | Bahr |
| Grid : | AK 9529 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 8400 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | SC.122 |
| Date of observation : | 17.03.1943 |
| Time of observation : | 22:14 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Port Auckland |
| Year of launch : | 1922 |
| Actual tonnage : | 8789 BRT |
| Actual result : | damaged |
| Position of target : | 52.25n 30.15w |
| Footnote : | U-305 hit "Port Auckland" and "Zouave" with a 2-torpedo spread, the latter of which sank in 5 min. A third torpedo hit "Port Auckland" which sank 2:08 hrs after a coup de grâce by U-305. |
| Convoy : | SC.122 |
| Route of convoy : | Sydney (Nova Scotia) - United Kingdom |
| Remark to convoy : | Slow (Atlantic) Convoys since Aug 1940, fast ones = HX, counter traffic = ON. |