Nummer: 28321a
| Area : | Pacific Ocean |
| Sea area : | South Pacific |
| Date of attack : | 23.06.1943 |
| Nationality of U-boat : | Japanese |
| U-boat : | Ro-103 |
| Commander : | Ichimura |
| presumed target type : | Steam Freighter |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | unknown |
| Date of observation : | 23.06.1943 |
| Nationality of target : | American |
| Actual type of target : | Transport Cargo |
| Name of target : | Aludra (AK 72) |
| Year of launch : | 1942 |
| Actual tonnage : | 7440 BRT |
| Actual result : | sunk |
| Position of target : | 11.26s 162.00e |
| related attacks : | Angriff 1 |
Transport Cargo Aludra (AK 72) ex American Robert T. Lincoln (bis 1942)
| Convoy : | unknown |