Nummer: 18516
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 04.10.1944 |
| Time of attack : | 22:49 |
| Nationality of U-boat : | German |
| U-boat : | U 1227 |
| Commander : | Altmeier |
| Grid : | BD 3932 |
| presumed target type : | Destroyer |
| presumed tonnage : | 1690 ts |
| presumed result : | sunk |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Convoy : | ONS.33 |
| Date of observation : | 04.10.1944 |
| Time of observation : | 22:05 |
| Nationality of target : | Canadian |
| Actual type of target : | Fregate |
| Name of target : | Chebogue (K.317) |
| Year of launch : | 1943 |
| Actual tonnage : | 1370 ts |
| Actual result : | not repaired, total loss |
| Position of target : | 49.20n 24.20w |
| Footnote : | "Chebogue" was towed to Port Talbot but not repaired. |
| Convoy : | ONS.33 |
| Route of convoy : | United Kingdom - North America (slow) |
| Remark to convoy : | 2nd series: Apr 1943 with new numbering (counter traffic SC) |