| Name: | POLEZNYI also recorded as POLEZNY |
| Type: | Icebreaker & Tug |
| Launched: | 23/04/1887 |
| Completed: | 06/1887 |
| Builder: | R & W Hawthorn, Leslie & Co Ltd |
| Yard: | Hebburn |
| Yard Number: | 271 |
| Dimensions: | 363grt, 21nrt, 150.5 x 27.0 x 12.5ft |
| Engines: | T3cyl (19, 30 & 50 x 33ins), 144nhp |
| Engines by: | R & W Hawthorn, Leslie & Co Ltd, Newcastle |
| Propulsion: | 1 x Screw, 12.0knots |
| Construction: | Steel |
| Reg Number: | n/a |
| History: | |
| 06/1887 | Russian Steam Navigation & Trading Co (ROPIT), Odessa |
| 13/02/1915 | Russian Imperial Navy - Black Sea Fleet |
| 18/07/1915 | Renamed T-33 also TRALCHSICK-33 (Minesweeper-33) |
| 31/01/1916 | Renamed T-42 |
| 1918 | Russian Steam Navigation & Trading Co (ROPIT), Odessa |
| 05/1918 | Russian White Navy - Black Sea Fleet; renamed POLEZNYI |
| 02/1920 | Russian Red Navy - Black Sea Fleet |
| 08/1920 | Soviet Navy; renamed KANONERSKAYA LODKA NO 7 (Gunboat No 7) |
| 1921 | Renamed KANONERSKAYA LODKA NO 3 |
| 25/05/1921 | Renamed POLEZNYI |
| 16/07/1922 | Government of USSR - Black Sea-Azov Shipping Co; renamed SARYCH |
| by 1930 | Sovtorgflot, Odessa |
| 1936 | Renamed SILIN |
| 18/11/1941 | Destroyed |
| Comments: | Proved to be a better tug than an icebreaker |
| 13/02/1915: Requisitioned as a minesweeper. | |
| Armed with 2 x 47mm Hotchkiss guns | |
| 25/05/1921: Disarmed and used as a tug | |
| 1922: Also recorded as SARYTCH | |
| 1933: Deleted from Lloyds Register | |
| 1936: Rebuilt | |
| 18/11/1941: Destroyed in a German air attack near Taman, Black Sea |
Above photo as T-33 is courtesy of Lemachko BV