Nummer: 28917
| Area : | Pacific Ocean |
| Sea area : | West Pacific |
| Date of attack : | 27.03.1945 |
| Time of attack : | 14:00 |
| Nationality of U-boat : | Japanese |
| U-boat : | Ha-64 |
| Commander : | Sato (Takaaki) |
| Grid : | Okinawa |
| presumed target type : | Heavy cruiser |
| presumed result : | damaged |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 27.03.1945 |
| Nationality of target : | American |
| Actual type of target : | |
| Name of target : | Success (AM.310) |
| Year of launch : | 1944 |
| Actual tonnage : | 850 ts |
| Actual result : | target visibly missed |
| Position of target : | 6nm W Zampa Misaki |
| updated on: | 00.09.2008 |