121b
| Name | 121b |
| Type | Sailing vessel |
| GRT | 124 tons |
| Country |  Greek |
| Built | |
| Builder | |
| Operator | |
| History | “Name” actually port registration number. |
U-boat attacks on Sailing vessel 121b
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 29 Aug 1918 | UC 37 (Otto Kümpel) | Sunk | 39° 44'N, 23° 19'E |
Position of attack on 121B
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