Nummer: 28304a
| Area : | Pacific Ocean |
| Sea area : | South Pacific |
| Date of attack : | 12.05.1943 |
| Nationality of U-boat : | Japanese |
| U-boat : | I-180 |
| Commander : | Kusaka |
| Grid : | Coff's Harbor |
| presumed target type : | Steam Freighter |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | PG.50 |
| Date of observation : | 12.05.1943 |
| Time of observation : | 14:12 |
| Nationality of target : | Australian |
| Actual type of target : | Steam Freighter |
| Name of target : | Ormiston |
| Year of launch : | 1922 |
| Actual tonnage : | 5832 BRT |
| Actual result : | damaged |
| Position of target : | 30.16s 153.23e |
| related attacks : | Angriff 1 |
| Convoy : | PG.50 |
| Route of convoy : | Brisbane - Sydney (Australia) |
| Remark to convoy : | Ascertained in 1943 |