Polymnia
| Name | Polymnia |
| Type | Steamer
|
| GRT | 2,426 tons |
| Country |  British |
| Built | 1903
|
| Builder | Blohm & Voss, Hamburg
|
| Operator | Kaye, Son & Co., Ltd., London (crown nominees)
|
| History |
|
U-boat attacks on Steamer Polymnia
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties |
| 1 | 15 May 1917 | UC 75 (Johannes Lohs) | Sunk | Torpedoed 15 miles W of the Lizard at 8:00am. Or 49.56N 05.35W
| 49° 54'N, 5° 34'W
| Huelva & Lisbon - U.K.
| iron ore & fruit
| 8
|
Position of attack on Polymnia
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