SK radar

Long wave search set for large ships. Furnishes range and bearing of surface vessels and aircraft, and can be used for control of interception. Set has both "A" and PPI scopes, provisions for operating with remote PPI's and for IFF connections, and built-in BL and BI antennas.[3]

Reliable maximum range, with antenna at 100 ft (30 m), is 100 miles (160 km) on medium bombers at 1,000 ft (300 m) altitude. Range accuracy is ± 100 yards (91 m). Azimuth accuracy, ± 3°. There is no elevation control, but elevation can be estimated roughly from positions of maximum, and minimum signal strength.[3]

Shipment includes spares, with tubes for 400 hours, and separate generator if ship's power is DC. Not air transportable.

SK has 10 components weighing approximately 5,000 lb (2,300 kg). Heaviest unit, at 2,400 lb (1,100 kg), is the antenna assembly. Antenna measures 15 ft (4.6 m) x 16 ft 9 in (5.11 m). Antenna should be 100 ft (30 m) or more above water. Minimum operators required are one per shift. Primary power required is 3500 kilowatts, 115 volts, 60 Hz. Source of power is ship's power of 115 volts, 60 Hz.[3]

During the later stages of the war, a parabolic antenna called SK-2 would then replace the SK-1.[1]

• 
  SK-1 aboard HMS Trumpeter
• 
  SK-1 aboard USS Texas
• 
  SK-1 aboard USS Wichita
• 
  SK-2 aboard USS Alabama
• 
  SK-2 aboard USS Macon
• 
  SK-3 aboard USS Princeton

• List of radars
• Radar configurations and types
• Air-search radar

• Norman Friedman (2006). The Naval Institute Guide to World Naval Weapon Systems. Naval Institute Press. ISBN 978-1-55750-262-9
• 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. ISBN 0-684-83529-0
• Hezlet, Arthur (1975). Electronics and Sea Power. New York: Stein and Day. ISBN 0-8128-1811-3