Nummer: 00204
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 15.09.1939 |
| Time of attack : | 15:44 |
| Nationality of U-boat : | German |
| U-boat : | U 53 |
| Commander : | Heinicke |
| Grid : | BE 3261 |
| presumed target type : | Steam Freighter (id) |
| presumed tonnage : | 8825 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 2 |
| Used weapon(s) : | Torpedo(es) + Gunfire |
| Date of observation : | 15.09.1939 |
| Time of observation : | 14:46 |
| Nationality of target : | British |
| Actual type of target : | Motor Tanker |
| Name of target : | Cheyenne |
| Year of launch : | 1930 |
| Actual tonnage : | 8825 BRT |
| Actual result : | sunk |
| Position of target : | 50.20n 13.30w |
| Footnote : | The abandoned wreck of "Cheyenne" was sunk by a British destroyer on Sep.15th, 1939. |
