SC was an American-made air and

surface-search radar A surface search radar, sometimes more accurately known as a sea-surface search radar or naval surveillance radar, is a type of military radar intended primarily to locate objects on the surface of lakes and oceans. Part of almost every modern naval ...

used during World War II by the United States Navy. Variations include SC-1, SC-2 and SC-3.

Overview

They were a longwave search sets, installed on

destroyer In naval terminology, a destroyer is a fast, manoeuvrable, long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against powerful short range attackers. They were originally developed in ...

s and larger ships to search for planes and surface vessels and for control of interception. All sets have an "A" scope, provision for

Identification friend or foe Identification, friend or foe (IFF) is an identification system designed for command and control. It uses a transponder that listens for an ''interrogation'' signal and then sends a ''response'' that identifies the broadcaster. IFF systems usual ...

(IFF) connections, and work with a gyro-compass repeater. SC-2 and SC-3 also have PPI scopes, remote PPI's, and built-in BL and BI*antennas. With antennas at 100', SC and SC-1 (without preamplifier) have a reliable maximum range of 30 miles on medium bombers at 1,000' altitude. With preamplifier, SC-1's range is extended to 75 miles – the same as that of SC-2 and SC-3. Range accuracy of SC is ± 200 yards; later models have an accuracy of ± 100 yds. bearing accuracy of SC and SC-21 is ± 5°; of SC-2 and SC-3, ± 3°. There is no elevation control on any of the sets, but height can be estimated roughly from positions of minimum signal strength. Shipment includes spares for each set. If separate generator is needed, it is included in shipment. Not air transportable. Both SC and SC-1 have 5 components weighing a total of 1800 lbs. SC-2 has 6 components weighing a total of 3,000 pounds. Weights and dimensions of antenna assemblies are 450 lbs. 6'111/2" x 8'6" for SC and SC-1; 478 lbs. 4'6" x 15' for SC-2 and SC-3. Antennas should be mounted as high as possible, preferably 100 feet or more, above other

superstructure A superstructure is an upward extension of an existing structure above a baseline. This term is applied to various kinds of physical structures such as buildings, bridges, or ships. Aboard ships and large boats On water craft, the superstruct ...

s. One operator per shift is minimum on all 3 sets. SC and SC-1 require primary power of 1500 watts at 115 volts, 60 cycles. SC-2 and SC-3 require 2500 watts at 115 volts, 60 cycles. All sets use ship's power of 115 volts, 60 cycles; transformer, if ship's power is 440 volts AC or 220 volts AC; motor generator if ship's power is DC.

Onboard ships

United States

* Essex-class aircraft carrier * Independence-class aircraft carrier * Yorktown-class aircraft carrier *

Avenger-class escort carrier The ''Avenger''-class escort carrier was a Ship class, class of escort carriers comprising three ships in service with the Royal Navy during the World War II, Second World War and one ship of the class in the United States Navy called the Charge ...

* Casablanca-class escort carrier * Long Island-class escort carrier * Iowa-class battleship * ''South Dakota''-class battleship * Colorado-class battleship * * ''New York''-class battleship * USS Sicard (DD-346)

* Gearing-class destroyer *

Allen M. Sumner-class destroyer The ''Allen M. Sumner'' class was a group of 58 destroyers built by the United States during World War II. Another twelve ships were completed as destroyer minelayers. The class was named for Allen Melancthon Sumner, an officer in the United S ...

* Fletcher-class destroyer * Gleaves-class destroyer * Benson-class destroyer * Sims-class destroyer *

Benham-class destroyer The ''Benham'' class of ten destroyers was built for the United States Navy (USN). They were part of a series of USN destroyers limited to 1,500 tons standard displacement by the London Naval Treaty and built in the 1930s.

Somers-class destroyer The ''Somers''-class destroyer was a class of five 1850-ton United States Navy destroyers based on the . They were answers to the large destroyers that the Japanese navy was building at the time, and were initially intended to be flotilla leader ...

Bagley-class destroyer The ''Bagley'' class of eight destroyers was built for the United States Navy. They were part of a series of USN destroyers limited to 1,500 tons standard displacement by the London Naval Treaty and built in the 1930s.Porter-class destroyer * Mahan-class destroyer * Farragut-class destroyer *

Wickes-class destroyer The ''Wickes''-class destroyers were a class of 111 destroyers built by the United States Navy in 1917–19. Along with the 6 preceding and 156 subsequent s, they formed the "flush-deck" or "four-stack" type. Only a few were completed in time t ...

Sampson-class destroyer The ''Sampson''-class destroyers served in the United States Navy during World War I. Commissioned in 1916 and 1917, the class was a modification of the and es, with the number of torpedo tubes increased from four twin-mounts to four triple-moun ...

John C. Butler-class destroyer escort The ''John C. Butler'' class were destroyer escorts that originated during World War II. The lead ship was , commissioned on 31 March 1944. The class was also known as the WGT type from their Westinghouse geared turbine drive. Of the 293 ships ...

Rudderow-class destroyer escort The ''Rudderow''-class destroyer escorts were destroyer escorts launched in the United States in 1943 to 1945. Of this class, 22 were completed as destroyer escorts, and 50 were completed as s and were re-classified as high speed transport APDs ...

* Buckley-class destroyer escort *

Edsall-class destroyer escort The ''Edsall''-class destroyer escorts were destroyer escorts built primarily for ocean antisubmarine escort service during World War II. The lead ship, , was commissioned on 10 April 1943 at Orange, Texas. The class was also known as the FMR t ...

* Chiwawa-class oiler * Kennebec-class oiler * Patapsco-class gasoline tanker

Australia

Gallery

File:HMAS Condamine (300544).jpg, SC-1 aboard File:Bridge of USS Cowpens (CVL-25), circa in November 1943 (80-G-K-527).jpg, SC-2 aboard File:SC radar of USS Niobrara (AO-72) c1953.jpg, SC-3 aboard File:Forecastle of USS Kidd (DD-661) at Baton Rouge, Louisiana (USA), on 26 August 1988.jpg, SC-3 aboard File:SC-radar of USS Rio Grande (AOG-3) in the early 1950s (7574664).jpg, SC-3 aboard

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 Touchstone may refer to: * Touchstone (assaying tool), a stone used to identify precious metals * Touchstone (metaphor), a means of assaying relative merits of a concept Entertainment * ''Touchstone'' (album), a 1982 album by Chick Corea * T ...

. * Hezlet, Arthur (1975). ''Electronics and Sea Power. New York: Stein and Day''. {{ISBN, 0-8128-1811-3 Naval radars World War II radars Military equipment introduced from 1940 to 1944 Military radars of the United States