Dolfijn
| Name | Dolfijn |
| Type | Sailing vessel |
| GRT | 140 tons |
| Country |  Dutch |
| Built | 1899 |
| Builder | J.J. Patje & Zonen, Waterhuizen |
| Operator | T. Eppinga |
| History | Former owner: R. Speelman, Groningen |
U-boat attacks on Sailing vessel Dolfijn
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 16 Nov 1916 | U 47 (Heinrich Metzger) | Sunk | Stopped and scuttled | 56° 50'N, 4° 20'E | Christiania - Newcastle | pitprops | 0 |
Position of attack on Dolfijn
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