Nummer: 17201
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 21.09.1943 |
| Time of attack : | 03:41 |
| Nationality of U-boat : | German |
| U-boat : | U 377 |
| Commander : | Kluth |
| Grid : | AK 2928 |
| presumed target type : | Destroyer |
| presumed result : | damaged |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Convoy : | ON.202 |
| Footnote : | U-377 heard a gnat detonation after 3:05 min - a misfunction. |
| Convoy : | ON.202 |
| 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) |