Ruby
| Name | Ruby |
| Type | Steamer
|
| GRT | 234 tons |
| Country |  British |
| Built | 1882
|
| Builder | J. Fullerton & Co., Paisley
|
| Operator | W. Cooper & Sons, Kirkwall
|
| History |
|
U-boat attacks on Steamer Ruby
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties |
| 1 | 29 Mar 1917 | UC 42 (Otto Heinrich Tornow) | Sunk | Mined 2.5 miles from Auskerry, Orkney Islands
|
| Leith - Kirkwall
| general goods
| 6
|
| Date of sinking given incorrectly in British Vessels Lost at Sea as March 28 resulting in a misattribution to UC 44. Reassessed in 2020 by Michael Lowrey, Kevin Heath, and Simon Schnetzke.
|
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