SK radar
SK was an American-made air-search radar used during World War II by the United States Navy. Models included SK-1, SK-2 and SK-3. Overview 
SK was a long wave search set for large ships. It furnished range and bearing of surface vessels and aircraft, and it could be used for control of interception. The set had both "A" and PPI scopes, provisions for operating with remote PPIs and for IFF connections, and built-in BL and BI antennas. With the antenna at , SK could detect medium bombers at  altitude at . Range accuracy was ±  and azimuth accuracy ± 3°. There was no elevation control, but elevation could be estimated roughly from positions of maximum and minimum signal strength. Shipment for SK included spares, with tubes for 400 hours, and a separate generator if the ship's power is DC. SK was not air transportable. SK had 10 components weighing approximately . The heaviest unit, at , was the antenna assembly. The antenna measured  x . It was mounted  or more above water. The minimum operators required were one per shift. Primary power required was 3500 kilowatts, 115 volts, 60 Hz. The source of power is ship's power of 115 volts, 60 Hz. During the later stages of World War II, a parabolic antenna called SK-2 replaced the SK-1. On board ships

United States 
 
 
 
 USS Enterprise (CV-6)
 USS Saratoga (CV-3)
 
 
 
 South Dakota-class battleship
 
 
 
 USS Pennsylvania (BB-38)
 
 
 USS Arkansas (BB-33)
 
 
 
 
 USS Wichita (CA-45)

United Kingdom 
 
 HMS Boxer (F121)

Gallery

See also 

 List of radars
 Radar configurations and types
 Air-search radar

Citations

References 

 Norman Friedman (2006). The Naval Institute Guide to World Naval Weapon Systems. Naval Institute Press. Buderi, Robert (1998). The Invention That Changed the World: How a Small Group of Radar Pioneers Won the Second World War and Launched a Technical Revolution. Touchstone. Hezlet, Arthur (1975). Electronics and Sea Power. New York: Stein and Day. Naval radars
World War II radars
Military equipment introduced from 1940 to 1944
Military radars of the United States