Nummer: 13103
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 29.10.1942 |
| Time of attack : | 22:16 |
| Nationality of U-boat : | German |
| U-boat : | U 509 |
| Commander : | Witte |
| Grid : | DH 5146 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 8000 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | SL.125 |
| Date of observation : | 29.10.1942 |
| Time of observation : | 19:30 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Corinaldo |
| Year of launch : | 1921 |
| Actual tonnage : | 7131 BRT |
| Actual result : | damaged |
| Position of target : | 33.20n 18.12w |
| Footnote : | "Corinaldo" was damaged by one torpedo from U-509 and two attempted coups de grâce from U-659, and was finally sunk by a torpedo and gunfire from U-203. |
| Convoy : | SL.125 |
| Route of convoy : | Sierra Leone (Freetown) - United Kingdom (Liverpool) |
| Remark to convoy : | Since Sep 1939; from May 1943 combined with MKS in Atlantic, counter traffic = OS. |