Rubonia
| Name | Rubonia |
| Type | Steamer
|
| GRT | 3,644 tons |
| Country |  Russian |
| Built | 1896
|
| Builder | Palmers’ SB. & Iron Co., Ltd., Jarrow
|
| Operator | Russian East Asiatic SS. Co., Ltd., St. Petersburg
|
| History | Built as British Trader for the British Shipowners Co., Ltd., Liverpool. Sold in 1906 to A. E. Stelp, Reval and renamed Sotrudnik. The Russian East Asiatic SS. Co. acquire the steamer in 1908, and changed the name to Rubonia.
|
U-boat attacks on Steamer Rubonia
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties |
| 1 | 22 Jul 1915 | U 36 (Ernst Graeff) | Sunk | W of the Shetlands
| 60° 20'N, 5° 19'W
| Cardiff - Archangelsk
| coal
| 0
|
Position of attack on Rubonia
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