Nummer: 02413
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 02.08.1940 |
| Time of attack : | 03:45 |
| Nationality of U-boat : | German |
| U-boat : | U 99 |
| Commander : | Kretschmer |
| Grid : | AL 6616 |
| presumed target type : | Tanker id |
| presumed tonnage : | 6556 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) + Gunfire |
| Convoy : | OB.191 |
| Date of observation : | 02.08.1940 |
| Time of observation : | 03:32 |
| Nationality of target : | British |
| Actual type of target : | Motor Tanker |
| Name of target : | Lucerna |
| Year of launch : | 1930 |
| Actual tonnage : | 6556 BRT |
| Actual result : | damaged |
| Position of target : | 55.18n 16.39w |
| Convoy : | OB.191 |
| Route of convoy : | Liverpool - North America (out) |
| Remark to convoy : | Sep 1939 to Jul 1940 via South Ireland, Jul to Okt 1940 via North Cannel, then ON. |