Nummer: 28409
| Area : | Pacific Ocean |
| Sea area : | South Pacific |
| Date of attack : | 12.11.1943 |
| Nationality of U-boat : | Japanese |
| U-boat : | I-21 |
| Commander : | Inada |
| presumed target type : | Steam Freighter |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 11.11.1943 |
| Time of observation : | 05:30 |
| Nationality of target : | American |
| Actual type of target : | Steam Freighter |
| Name of target : | Cape San Juan |
| Year of launch : | 1943 |
| Actual tonnage : | 6711 BRT |
| Actual result : | sunk |
| Position of target : | 22.08s 178.06w |
| updated on: | 00.00.0000 |
| Remark: | Local date 12.11 |
| Changes: | 1) www.history.navy.mil: 12.11. Lokalzeit // 11.11. US-Zeit 2) sensuikan: Angriffsdatum 11.11. |