Nummer: 12109a
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 11.09.1942 |
| Time of attack : | 00:16 |
| Nationality of U-boat : | German |
| U-boat : | U 404 |
| Commander : | Bülow |
| Grid : | AK 9876 |
| presumed target type : | Tanker |
| presumed tonnage : | 6000 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | ON.127 |
| Date of observation : | 10.09.1942 |
| Time of observation : | 22:25 |
| Nationality of target : | Norwegian |
| Actual type of target : | Motor Tanker |
| Name of target : | Marit II |
| Year of launch : | 1922 |
| Actual tonnage : | 7417 BRT |
| Actual result : | damaged |
| Position of target : | 51.16n 29.08w |
| Footnote : | U-404 observed hits after 3:12 min and 3:32 min with water columns. U-608 observed one hit after 28 sec. Probably only one torpedo of U-404 hit "Marit II". She was damaged but joined the convoy again on Sep.12th and reached port on Sep.16th, 1942. |
| related attacks : | Angriff 1 Angriff 2 |
| Convoy : | ON.127 |
| 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) |