Nummer: 28502
| Area : | Pacific Ocean |
| Sea area : | North Pacific |
| Date of attack : | 19.04.1944 |
| Nationality of U-boat : | Japanese |
| U-boat : | I-180 |
| Commander : | Fujita |
| Grid : | ---- |
| presumed target type : | --- |
| presumed tonnage : | ---- |
| presumed result : | hit not ascertained |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 18.04.1944 |
| Time of observation : | 23:58 |
| Nationality of target : | American |
| Actual type of target : | Steam Freighter |
| Name of target : | John Straub |
| Year of launch : | 1943 |
| Actual tonnage : | 7176 BRT |
| Actual result : | sunk |
| Position of target : | 54.22n 163.24w |
| Footnote : | I-180 did not report this successes as she was sunk with all hands on April 26, 1944. |
| updated on: | 00.00.0000 |
| Changes: | 1) Heßling 25.02.15: Unimak Is. 2) I-180 meldete weder Angriff noch Position. |