St. Magnus
| Name | St. Magnus |
| Type | Passenger steamer |
| GRT | 809 tons |
| Country |  British |
| Built | 1912 |
| Builder | Ramage & Ferguson, Ltd., Leith |
| Operator | North of Scotland, Orkney & Shetland Steam Nav. Co., Aberdeen |
| History |
U-boat attacks on Passenger steamer St. Magnus
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 12 Feb 1918 | UC 58 (Karl Vesper) | Sunk | Torpedoed 3 miles NNE of Peterhead | 57° 32'N, 1° 44'W | Lerwick - Aberdeen | passengers, mail & general cargo | 5 |
| 57.32.15N 01.43.36W | ||||||||
Position of attack on St. Magnus
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