Mary
| Name | Mary |
| Type | Barge
|
| GRT | 560 tons |
| Country |  Norwegian |
| Built | 1869
|
| Builder | A. McDougall, Maitland NB
|
| Operator | Lægter A/S Superb (Olsen & Ugelstad), Kristiania
|
| History | Built as a barque but cut down to a lighter in 1906.
|
U-boat attacks on Barge Mary
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties |
| 1 | 24 Jul 1916 | UB 23 (Ernst Voigt) | Sunk | Stopped and scuttled 30 miles ENE of the Tyne
| 55° 12'N, 0° 35'E
| Fredrikstad – West Hartlepool
| pit props
| 0
|
| Under tow of the steamer Veslefjell.
|
Position of attack on Mary
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