Nummer: 01816
| Area : | Western Area |
| Sea area : | North Sea |
| Date of attack : | 01.06.1940 |
| Time of attack : | 23:48 |
| Nationality of U-boat : | German |
| U-boat : | U 58 |
| Commander : | Kuppisch |
| Grid : | AN 1829 |
| presumed target type : | Armed Merchant Cruiser id |
| presumed tonnage : | 8400 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 01.06.1940 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Astronomer |
| Year of launch : | 1917 |
| Actual tonnage : | 8401 BRT |
| Actual result : | sunk |
| Position of target : | 58.01n 02.12w |
