Cairndhu
| Name | Cairndhu |
| Type | Steamer |
| GRT | 4,109 tons |
| Country |  British |
| Built | 1911 |
| Builder | W. Doxford & Sons, Ltd., Sunderland |
| Operator | Cairn Line of Steamships, Ltd. (Cairns, Noble & Co.), Newcastle |
| History |
U-boat attacks on Steamer Cairndhu
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 16 Apr 1917 | UB 40 (Hans Howaldt) | Sunk | 25 miles W of Beachy Head | Tyne - Gibraltar | coal | 11 | |
| Or later on April 15. | ||||||||
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