Britain
Sea Cat GWS-20, GWS-21 and GWS-22
Updated 19 November 2006
Sea Cat was the first point-defense missile to enter Naval service and was based upon the Malkara anti-tank missile.  This missile was designed to replace twin 40 mm Bofors mounts with a quad-missile launcher.  The earliest version, GWS-20, was eyeball controlled, with the operator using binoculars and a joystick.

 To aid in the replacement of the 40 mm mountings, the GWS-21 version was actually controlled by the Type 262 Radar gun control used by the 40 mm Bofors.  GWS-22 uses a modified director based upon the MRS-3 (the British version of the Mark 56 FCS).  GWS-24 employs the WSA-4 FCS.

Sea Cat is mounted on a 4 round trainable launcher.  Reloading is by hand, carrying missiles by trolley from the magazine.  There was also a lightweight 3 round version for small ships. 

The missile proved accurate, reliable and cheap and 7 other countries have used it, although it has been replaced in Royal Navy service by the Sea Dart and Sea Wolf. 
 
WMBR_Sea_Cat_pic.jpg

Quad Sea Cat launcher with original visual director
Picture courtesy of Andy Cashmore
WMBR_Sea_Cat_launch_pic.jpg

SeaCat Launcher
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Description
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Designation Sea Cat GSW-20, 21, 22 and 24
Ship Class Used On Tribal Class (GWS-21)
Country and Leander Classes (GWS-22)
Amazon Class (GWS-24)
Date In Service 1962
Weight 150 lbs. (68 kg)
Dimensions 48.3 x 378.5 in (19 x 149 cm)
Span:  165 in (65 cm)
Payload Warhead has both proximity and impact fuzing
Speed / Range Mach 0.9 / 5,500 yards (5,000 m)
Propulsion Dual thrust solid fuel
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Data from
"Jane's Pocket Book 9:  Naval Armament" edited by Denis Archer
"The Naval Institute Guide to World Naval Weapon Systems 1991/92" by Norman Friedman