Nummer: 04003a
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 21.12.1940 |
| Time of attack : | 22:09 |
| Nationality of U-boat : | Italian |
| U-boat : | MOCENIGO |
| Commander : | Agostini |
| Grid : | 40.40n 16.34w |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 3700 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 2- |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | OG.47 |
| Date of observation : | 21.12.1940 |
| Nationality of target : | Swedish |
| Actual type of target : | Steam Freighter |
| Name of target : | Mangen |
| Year of launch : | 1922 |
| Actual tonnage : | 1253 BRT |
| Actual result : | sunk |
| Position of target : | 40.45n 16.50n |
| related attacks : | Angriff 1 Angriff 2 |
| Convoy : | OG.47 |
| Route of convoy : | United Kingdom - Gibraltar (out) |
| Remark to convoy : | Sep 1939 to Jul 1940 via South Ireland, Jul 1940 to Aug 1943 via North Channel; later KMS. |