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- Projekt ASS: U-Boot-Erfolge der Achsenmächte 1939-1945
- Übersicht > ID 4634
| Area : | Mediterranean |
| Sea area : | North African Seaway |
| Date of attack : | 13.06.1942 |
| Time of attack : | 00:40 |
| Nationality of U-boat : | German |
| U-boat : | U 431 |
| Commander : | Dommes |
| Grid : | CO 9316 |
| presumed result : | target visibly missed |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | Vigorous |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | City of Calcutta |
| Year of launch : | 1940 |
| Actual tonnage : | 8063 BRT |
| Actual result : | hit not ascertained |
| Position of target : | Tobruk |
| related attacks : | Angriff 1
|
| Convoy : | Vigorous |
| Route of convoy : | Alexandria, Port Said, Haifa - Malta (cf. Harpoon) |
| Remark to convoy : | Supply operation for Malta 12.-16.6.1942 |
