Nummer: 22509b
| Area : | Mediterranean |
| Date of attack : | 31.03.1941 |
| Time of attack : | 02:44 |
| Nationality of U-boat : | Italian |
| U-boat : | AMBRA |
| Commander : | Arillo |
| Grid : | 33.20n 26.35e |
| presumed target type : | Destroyer |
| presumed result : | damaged |
| Number of torpedoes/mines : | - |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | GA.8 |
| Date of observation : | 31.03.1941 |
| Nationality of target : | Australian |
| Actual type of target : | Destroyer |
| Name of target : | Stuart (D.00) |
| Year of launch : | 1918 |
| Actual tonnage : | 1580 ts |
| Actual result : | target visibly missed |
| Position of target : | 90nm S Crete |
| Footnote : | "Ambra" observed a heavy ecxplosion and assumed one ship sunk and another damaged. - In reality the first torpedo hit and sank the cruiser, the second missed HMAS "Stuart". |
| related attacks : | Angriff 1 |
| Convoy : | GA.8 |
| Route of convoy : | Greece - Alexandria |
| Remark to convoy : | March to April 1941 |