Nummer: 01704
| Area : | Western Area |
| Sea area : | North Sea |
| Date of attack : | 10.04.1940 |
| Time of attack : | 02:13 |
| Nationality of U-boat : | German |
| U-boat : | U 4 |
| Commander : | Hinsch |
| Grid : | AN 2989 |
| presumed target type : | Submarine |
| presumed tonnage : | 1500 ts |
| presumed result : | sunk |
| Number of torpedoes/mines : | 2- |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 10.04.1940 |
| Nationality of target : | British |
| Actual type of target : | Submarine |
| Name of target : | Thistle |
| Year of launch : | 1939 |
| Actual tonnage : | 1090 ts |
| Actual result : | sunk |
| Position of target : | near Skudesnes |
