Nummer: 16810
| Area : | Western Area |
| Sea area : | US East Coast |
| Date of attack : | 02.07.1943 |
| Time of attack : | 06:07 |
| Nationality of U-boat : | German |
| U-boat : | U 66 |
| Commander : | Markworth |
| Grid : | DB 6374 |
| presumed target type : | Tanker |
| presumed tonnage : | 7000 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) + Gunfire |
| Date of observation : | 02.07.1943 |
| Nationality of target : | American |
| Actual type of target : | Steam Tanker |
| Name of target : | Bloody Marsh |
| Year of launch : | 1943 |
| Actual tonnage : | 10195 BRT |
| Actual result : | sunk |
| Position of target : | 31.33n 78.57w |