Nummer: 27909
| Area : | Pacific Ocean |
| Sea area : | Australian Area |
| Date of attack : | 03.06.1942 |
| Time of attack : | 21:38 |
| Nationality of U-boat : | Japanese |
| U-boat : | I-24 |
| Commander : | Hanabusa |
| Grid : | Sydney |
| presumed target type : | Steam Freighter |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 03.06.1942 |
| Time of observation : | 22:42 |
| Nationality of target : | Australian |
| Actual type of target : | Steam Freighter |
| Name of target : | Iron Chieftain |
| Year of launch : | 1937 |
| Actual tonnage : | 4812 BRT |
| Actual result : | sunk |
| Position of target : | 33.55s 151.50e |