Nummer: 19011a
| Area : | Western Area |
| Sea area : | Irish Sea |
| Date of attack : | 21.02.1945 |
| Time of attack : | 08:26 |
| Nationality of U-boat : | German |
| U-boat : | U 1064 |
| Commander : | Schneidewind |
| Grid : | AM 6547 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 6000 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | UR.155 |
| Date of observation : | 21.02.1945 |
| Time of observation : | 08:39 |
| Nationality of target : | Icelandic |
| Actual type of target : | Steam Freighter |
| Name of target : | Dettifoss |
| Year of launch : | 1930 |
| Actual tonnage : | 1564 BRT |
| Actual result : | sunk |
| Position of target : | 55.03n 05.29w |
| Footnote : | U-1064 reported three ships of 17.000 gross tons sunk. |
| related attacks : | Angriff 1 Angriff 2 |
| Convoy : | UR.155 |
| Route of convoy : | Loch Ewe / Belfast - Reykjavik (Iceland) |
| Remark to convoy : |