Nummer: 12308
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 13.09.1942 |
| Time of attack : | 14:36 |
| Nationality of U-boat : | German |
| U-boat : | U 594 |
| Commander : | Mumm |
| Grid : | BD 6316 |
| presumed target type : | Steam Freighter id |
| presumed tonnage : | 6131 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | ON.127 s |
| Date of observation : | 13.09.1942 |
| Nationality of target : | Panamanian |
| Actual type of target : | Steam Freighter |
| Name of target : | Stone Street |
| Year of launch : | 1922 |
| Actual tonnage : | 6074 BRT |
| Actual result : | sunk |
| Position of target : | 48.18n 39.43w |
Steam Freighter Stone Street ex Italian Clara (bis 1941)
| Convoy : | ON.127 s |
| Route of convoy : | United Kingdom - North America |
| Remark to convoy : | 1st series: Jul 1941 to Mar 1943 ON and ONS combined, later ON mit continuing and ONS with new numbering (counter traffic HX and SC) |