Nummer: 28213
| Area : | Pacific Ocean |
| Sea area : | South Pacific |
| Date of attack : | 24.04.1943 |
| Nationality of U-boat : | Japanese |
| U-boat : | I-26 |
| Commander : | Yokota |
| presumed target type : | Steam Freighter |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | BT.54 |
| Date of observation : | 24.04.1943 |
| Time of observation : | 19:00 |
| Nationality of target : | Australian |
| Actual type of target : | Steam Freighter |
| Name of target : | Kowarra |
| Year of launch : | 1916 |
| Actual tonnage : | 2125 BRT |
| Actual result : | sunk |
| Position of target : | 24.26s 153.44e |
| Convoy : | BT.54 |
| Route of convoy : | Brisbane - Townsville |
| Remark to convoy : | From August 1942 to May 1943 |