Navigator
| Name | Navigator |
| Type | Steamer |
| GRT | 3,803 tons |
| Country |  British |
| Built | 1914 |
| Builder | Charles Connell & Co., Ltd., Glasgow |
| Operator | Charente SS. Co., Ltd. (T. & J. Harrison), Liverpool |
| History | or 2808 tons |
U-boat attacks on Steamer Navigator
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 18 Mar 1918 | UC 75 (Walter Schmitz) | Damaged | Torpedoed 10 miles N66°W of Portland Bill | Middlesborough - South Africa | general cargo | 0 |
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