Nummer: 18213b
| Area : | Western Area |
| Sea area : | Carribean Sea |
| Date of attack : | 04.07.1944 |
| Time of attack : | 16:46 |
| Nationality of U-boat : | German |
| U-boat : | U 539 |
| Commander : | Lauterbach-Emden |
| Grid : | ED 2394 |
| presumed target type : | Tanker |
| presumed tonnage : | 9000 BRT |
| presumed result : | damaged |
| Number of torpedoes/mines : | 2- |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 04.07.1944 |
| Nationality of target : | American |
| Actual type of target : | Steam Tanker |
| Name of target : | Kittanning |
| Year of launch : | 1943 |
| Actual tonnage : | 10195 BRT |
| Actual result : | damaged |
| Position of target : | 09.55n 79.27w |
| Footnote : | U-539 fired a spread of 2-torpedoes. The 1st one damaged "Kittanning" again, the 2nd one allegedly hit another tanker, behind. |
| related attacks : | Angriff 1 Angriff 2 Angriff 3 |
| updated on: | 05.09.2013 |
| Remark: | 2er-Fächer |
| Changes: | 1) 16u46 Torpedo abgefeuert. 2) 16u46 1. Detonation ; 16u49 2. Detonation 3) Einzelfahrer; kein Konvoi |