Sanwen
| Name | Sanwen |
| Type | Steamer |
| GRT | 3,689 tons |
| Country |  British |
| Built | 1915 |
| Builder | J. Priestman & Co., Sunderland |
| Operator | W. & C. T. Jones SS. Co., Ltd. (W. & C. T. Jones), London (Cardiff) |
| History |
U-boat attacks on Steamer Sanwen
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 29 Sep 1917 | U 32 (Kurt Hartwig) | Sunk | 50 miles E¾N of Cape Bear | 42° 52'N, 4° 15'E | Clyde - Naples | coal & coke | 2 |
Position of attack on Sanwen
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