Diligence
| Name | Diligence |
| Type | Fishing vessel (smack) |
| GRT | 20 tons |
| Country |  British |
| Built | |
| Builder | |
| Operator | ?, Hull |
| History | Tonnage approximate. Registration H 217. |
U-boat attacks on Fishing vessel (smack) Diligence
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 28 Jun 1917 | UC 63 (Karsten von Heydebreck) | Damaged | Stopped and disabled 10 miles NE of Spurn Point | 0 |
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