Nummer: 28105
| Area : | Pacific Ocean |
| Sea area : | South Pacific |
| Date of attack : | 20.10.1942 |
| Nationality of U-boat : | Japanese |
| U-boat : | I-176 |
| Commander : | Tanabe |
| presumed target type : | Battleship |
| presumed result : | damaged |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | Task F. |
| Date of observation : | 20.10.1942 |
| Nationality of target : | American |
| Actual type of target : | Heavy cruiser |
| Name of target : | Chester (CA 27) |
| Year of launch : | 1929 |
| Actual tonnage : | 9200 ts |
| Actual result : | damaged |
| Position of target : | 13.31s 163.17e |
| Footnote : | I-176 attacked a task group containing the battleship USS "Washington" and assumed a hit on her. |
| Convoy : | Task F. |