Nummer: 03421
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 20.10.1940 |
| Time of attack : | 07:20 |
| Nationality of U-boat : | German |
| U-boat : | U 100 |
| Commander : | Schepke |
| Grid : | AM 4149 |
| presumed target type : | Steam Freighter id |
| presumed tonnage : | 5458 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) + Gunfire |
| Convoy : | HX.79 s |
| Date of observation : | 20.10.1940 |
| Time of observation : | 06:30 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Loch Lomond |
| Year of launch : | 1934 |
| Actual tonnage : | 5452 BRT |
| Actual result : | sunk |
| Position of target : | 56.00n 14.30w |
| Convoy : | HX.79 s |
| Route of convoy : | (New York) - Halifax - United Kingdom |
| Remark to convoy : | Sep 1939 to Sep 1942 ab Halifax, then from New York (counter traffic = ON), vgl. HXF und SC. |