Nummer: 11905
| Area : | Western Area |
| Sea area : | Canada |
| Date of attack : | 27.08.1942 |
| Time of attack : | 13:48 |
| Nationality of U-boat : | German |
| U-boat : | U 517 |
| Commander : | Hartwig |
| Grid : | AH 9823 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 5000 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | SG.6F |
| Date of observation : | 27.08.1942 |
| Time of observation : | 08:46 |
| Nationality of target : | American |
| Actual type of target : | Passenger Liner |
| Name of target : | Chatham |
| Year of launch : | 1926 |
| Actual tonnage : | 5649 BRT |
| Actual result : | sunk |
| Position of target : | 51.52n 55.30w |
| Convoy : | SG.6F |
| Route of convoy : | Sydney (Nova Scotia) - Greenland |
| Remark to convoy : | Since 1942 (counter traffic = GS) |
| updated on: | 30.05.2021 |
| Remark: | POS |
| Changes: | 1) 01.04.2002 Kolbicz (L2): -DP (Passagierdampfer) 2) 30.05.2021 Admirality War Diary: 51.52n 55.30w 3) Angabe in Lloyd's War Losses (51.53n 55.48w) siehe "Arlyn" |