Nummer: 27116
| Area : | Indic Ocean |
| Date of attack : | 05.10.1943 |
| Time of attack : | 02:37 |
| Nationality of U-boat : | Japanese |
| U-boat : | I-10 |
| Commander : | Tonozuka |
| Grid : | Aden Gulf |
| presumed target type : | Tanker |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | AP.47 d |
| Date of observation : | 05.10.1943 |
| Nationality of target : | Norwegian |
| Actual type of target : | Motor Tanker |
| Name of target : | Anna Knudsen |
| Year of launch : | 1931 |
| Actual tonnage : | 9057 BRT |
| Actual result : | damaged |
| Position of target : | 14.20n 50.47e |
| Convoy : | AP.47 d |
| Route of convoy : | Aden - Persisan Gulf |
| Remark to convoy : | Since autemn 1942 |