Maidag
| Name | Maidag |
| Type | Steamer |
| GRT | 1,235 tons |
| Country |  Norwegian |
| Built | 1916 |
| Builder | P. Ph. Stuhr’s Mask. & Skbs., Aalborg |
| Operator | A/S Nordsjøen (Rich. Peterson), Christiania |
| History |
U-boat attacks on Steamer Maidag
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 15 Dec 1917 | U 104 (Kurt Bernis) | Sunk | Torpedoed 22 miles S of Wolf Rock | 49.36N, 05.36W | Newport - Bordeaux | coal | 3 |
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