Nummer: 15710e
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 16.03.1943 |
| Time of attack : | 20:50 |
| Nationality of U-boat : | German |
| U-boat : | U 172 |
| Commander : | Emmermann |
| Grid : | CF 4515 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 10000 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | UGS.6 |
| Date of observation : | 16.03.1943 |
| Nationality of target : | American |
| Actual type of target : | Steam Freighter |
| Name of target : | Benjamin Harrison |
| Year of launch : | 1942 |
| Actual tonnage : | 7191 BRT |
| Actual result : | sunk |
| Position of target : | 39.09n 24.15w |
| Footnote : | U-172 attacked at the same time as U-524, and heard ten detonations. U-524 didn't report any hits. U-172 fired a 4-torpedo spread and heard detonations after 2:50 min, 3:10 min, and 3:20 min (2). After a stern spread, hits after 56 sec and 58 sec were observed. Probably both torpedoes hit "Benjamin Harrison". Other detonations must have been depth charges of the American escorts. |
| related attacks : | Angriff 1 Angriff 2 Angriff 3 Angriff 4 |
| Convoy : | UGS.6 |
| Route of convoy : | U.S.A. - Gibraltar (slow) |
| Remark to convoy : | Since Oct 1942, initially for Op. Torch, then to ports in Northwest-Africa |