Nummer: 28107
| Area : | Pacific Ocean |
| Sea area : | South Pacific |
| Date of attack : | 27.10.1942 |
| Time of attack : | 03:38 |
| Nationality of U-boat : | Japanese |
| U-boat : | I-21 |
| Commander : | Matsumura |
| presumed target type : | Battleship |
| presumed tonnage : | 32500 ts |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | Task F. |
| Date of observation : | 27.10.1942 |
| Nationality of target : | American |
| Actual type of target : | Battleship |
| Name of target : | Washington (BB 56) |
| Year of launch : | 1940 |
| Actual tonnage : | 35000 ts |
| Actual result : | target visibly missed |
| Position of target : | 15.30s 160.22e |
| Footnote : | I-21 assumed a hit on a battleship of "Colorado"-class, but the torpedo detonated 350 yards from the battleship USS "Washington", which had not been the target but was reported attacked by I-15/Ishikawa. - On Sep.15th I-15 had attacked the task group containing battleship USS "North Carolina", but its torpedoes missed. The hits came from an attack of I-19 some minutes earlier (see FN.5487). |
| Convoy : | Task F. |