Nummer: 12309a
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 14.09.1942 |
| Time of attack : | 02:05 |
| Nationality of U-boat : | German |
| U-boat : | U 91 |
| Commander : | Walkerling |
| Grid : | BC 6191 |
| presumed target type : | Destroyer |
| presumed tonnage : | 1375 ts |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | ON.127 |
| Date of observation : | 14.09.1942 |
| Time of observation : | 00:03 |
| Nationality of target : | Canadian |
| Actual type of target : | Destroyer |
| Name of target : | Ottawa (H 60) |
| Year of launch : | 1935 |
| Actual tonnage : | 1375 ts |
| Actual result : | sunk |
| Position of target : | 47.55n 43.27w |
| Footnote : | U-91 assumed that she hit two destroyers, but in reality only "Ottawa" was hit by two torpedoes. |
| related attacks : | Angriff 1 |
Destroyer Ottawa (H 60) ex British Destroyer Griffin (H.31) (bis 1943)
| Convoy : | ON.127 |
| Route of convoy : | United Kingdom - North America |
| Remark to convoy : | 1st series: Jul 1941 to Mar 1943 ON and ONS combined, later ON mit continuing and ONS with new numbering (counter traffic HX and SC) |
| updated on: | 25.06.2002 |
| Remark: | Ottawa (H 60) |