Hartdale
| Name | Hartdale |
| Type | Steamer |
| GRT | 3,839 tons |
| Country |  British |
| Built | 1910 |
| Builder | Craig, Taylor & Co., Ltd., Stockton |
| Operator | Trechmann SS. Co., Ltd. (Trechmann Bros.), West Hartlepool |
| History |
U-boat attacks on Steamer Hartdale
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 13 Mar 1915 | U 27 (Bernd Wegener) | Sunk | 7 miles SExE South Rock | 54.25N, 05.08W | Glasgow - Alexandria | coal | 2 |
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