Nummer: 15607
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 11.03.1943 |
| Time of attack : | 19:17 |
| Nationality of U-boat : | German |
| U-boat : | U 621 |
| Commander : | Kruschka |
| Grid : | AK 7174 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 6000 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo coup de grâce |
| Convoy : | ONS.169s |
| Date when ship was reported missed : | 09.03.1943 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Baron Kinnaird |
| Year of launch : | 1927 |
| Actual tonnage : | 3355 BRT |
| Actual result : | sunk |
| Position of target : | 50n 40w |
| Footnote : | U-621 sank an independent ship steering southwest. - "Baron Kinnaird" was straggling after March 6th and reported missing after March 7th. |
| Convoy : | ONS.169s |
| 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) |