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|Name:||Vanya class (Project 257)|
|Preceded by:||Sasha class minesweeper|
|Succeeded by:||Zhenya class minesweeper|
|Displacement:||200 tons standard, 260 tons full load|
|Propulsion:||2 shaft diesel engines 2200 hp|
|Speed:||16 knots (30 km/h)|
|Range:||2,400 nautical miles (4,444.8 km) at 10 knots (19 km/h)|
|radar: Don 2|
The ships were designed as coastal mine hunters. The hulls were built out of wood for significantly reduced magnetic signature. Measures were also taken to reduce electrical and acoustic signature. The propellers were fitted without bubble shields. A more advanced version the Project 257DM was introduced in the mid-1960s. The Project 699 was a version with more powerful diesel engines for towing heavier sweeps.
A total of 47 units were built by shipyards in Kolpino and Vladivostok (3 Project 699).
All ships were retired by the mid-1990s
Gardiner, Robert (ed.). Conway's all the World's Fighting Ships 1947-1995. London: Conway Maritime. ISBN 0-85177-605-1. OCLC 34284130. Also published as Gardiner, Robert; Chumbley, Stephen; Budzbon, Przemysław. Conway's all the World's Fighting Ships 1947-1995. Annapolis, MD: Naval Institute Press. ISBN 1-55750-132-7. OCLC 34267261.