122:. The ZIF designation is an industrial one and it is possible that the naval designations were AK-157 (ZIF-71), AK-257 (ZIF-31) and AK-457 (ZIF-75). In smaller warships these mountings were sometimes associated with MR-103 and in larger ones with the Yakhond (Hawk Screech) radar. The ZIF-31/71/75 mountings may not have been very successful and an improved twin mounting appeared shortly afterwards as the AK-725. The twin 57mm ZIF-31 has also been manufactured in China as the Type 66 and there is a water-cooled derivative known as the Type 76. The AK-257 is currently employed on the
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The twin gun version, ZIF-31, appears to have entered service with the
Project 264 Minesweepers (T58 class) and the Project 310 (Don class) submarine support ships in 1958. In 1960, two other versions of the mounting appeared; a single gun ZIF-71 for the modernised
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is a Soviet 57mm naval gun, originally a land ZIF-31 L/70 57mm (Type 66/76) cannon. During the early 1950s, development began of naval versions of the 57x348mmSR 70 calibre weapon which had entered service with the
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in 1950 as the S-60. This was to be a supplementary weapon for larger warships and as the main gun armament for
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Soviet Cannon - A Comprehensive Study of Soviet Arms and
Ammunition in Calibres 12.7mm to 57mm
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77:Learn how and when to remove this message
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144:"Seagoing minesweeper - Project 264"
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177:. Austria: Koll. p. 472.
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171:Koll, Christian (2009).
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