Nummer: 16901a
| Area : | Western Area |
| Sea area : | Brasilian Coast |
| Date of attack : | 07.07.1943 |
| Time of attack : | 06:07 |
| Nationality of U-boat : | German |
| U-boat : | U 185 |
| Commander : | Maus |
| Grid : | FC 7179 |
| presumed target type : | Tanker |
| presumed tonnage : | 8000 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | BT.18 |
| Date of observation : | 07.07.1943 |
| Nationality of target : | American |
| Actual type of target : | Steam Tanker |
| Name of target : | William Boyce Thompson |
| Year of launch : | 1921 |
| Actual tonnage : | 7061 BRT |
| Actual result : | sunk |
| Position of target : | 04.05s 35.58w |
| Footnote : | U-185 probably made two attacks. In the first, hits on two ships were observed. The ships were left in sinking condition. An additional megnetic detonation was heard. In the second attack, an ammunition freighter exploded, and another ship slowly sank. |
| related attacks : | Angriff 1 Angriff 2 |
| Convoy : | BT.18 |
| Route of convoy : | Bahia - Trinidad |
| Remark to convoy : | Nov 1942 to Jul 1943 (counter traffic = TB), then JT. |