Helenus
| Name | Helenus |
| Type | Steamer |
| GRT | 7,555 tons |
| Country |  British |
| Built | 1913 |
| Builder | Scotts’ SB. & Eng. Co., Ltd., Greenock |
| Operator | Ocean Steam Ship Co., Ltd. (A. Holt & Co.), Liverpool |
| History |
U-boat attacks on Steamer Helenus
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 1 Dec 1917 | U 53 (Hans Rose) | Damaged | Torpedoed 150 miles SW of Lizard | Baltimore & New York - London | 0 |
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