Nummer: 01712
| Area : | Western Area |
| Sea area : | Norway West Coast |
| Date of attack : | 17.04.1940 |
| Time of attack : | 17:33 |
| Nationality of U-boat : | German |
| U-boat : | U 13 |
| Commander : | Schulte |
| Grid : | AF 7890 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 5000 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 17.04.1940 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Swainby |
| Year of launch : | 1917 |
| Actual tonnage : | 4935 BRT |
| Actual result : | sunk |
| Position of target : | 25sm N Muckle Flugga, She |
