Assertion: destroyer's gun | /r/HasProperty | guided by a mk 22 height-finder
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text: The main gun armament of the Fletcher was five dual-purpose 5 inch/38 caliber (127 mm) guns in single mounts, guided by a Mark 37 Gun Fire Control System, including a Mk 12 fire control radar and a Mk 22 height-finder (both replaced by the circular Mk 25 radar postwar) linked by a Mark 1A Fire Control Computer and stabilized by a Mk 6 8,500 rpm gyroscope.