Nummer: 28203
| Area : | Pacific Ocean |
| Sea area : | South Pacific |
| Date of attack : | 22.01.1943 |
| Nationality of U-boat : | Japanese |
| U-boat : | I-21 |
| Commander : | Matsumura |
| Grid : | Sydney |
| presumed target type : | Steam Freighter |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 22.01.1943 |
| Time of observation : | 21:55 |
| Nationality of target : | American |
| Actual type of target : | Steam Freighter |
| Name of target : | Peter H. Burnett |
| Year of launch : | 1942 |
| Actual tonnage : | 7176 BRT |
| Actual result : | not repaired, total loss |
| Position of target : | 32.54s 159.32e |
| Footnote : | I-21 reported during this patrol the sinking of 6 ships. "Mobilube" and "Peter H. Burnett" were towed into port, but were total losses. "Starr King" sank on Feb.11th, 1943. |