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{{short description|Radar of the United States Navy}}
{{Infobox radar|name=SC (radar)|image=File:SC radar antenna aboard USS Long Island (AVG-1), 13 March 1942 (80-G-413462).jpg|caption=SC-1 aboard {{USS|Long Island|CVE-1|6}}|country=[[United States]]|type=[[Air search radar|Air]]/[[Surface-search radar]]|introdate=1942|power=220 [[Kilowatt|kW]]|frequency=[[VHF Band|VHF band]]|range=48–120 [[Kilometre|km]] (30–75 [[Mile|mi]])|manufacturer=[[General Electric]]|beamwidth=10–25°|pulsewidth=4–5 [[Microsecond|μs]]|PRF=60 [[Hertz|Hz]]|precision=90–180 [[Metre|m]] (98–197 [[Yard|yd]])}}

'''SC''' was an American-made [[Air search radar|air]] and [[surface-search radar]] used during World War II by the [[United States Navy]]. Variations include '''SC-1''', '''SC-2''' and '''SC-3'''.<ref>{{Cite book|last=Robert|first=Buderi|title=The Invention That Changed the World: How a Small Group of Radar Pioneers Won the Second World War and Launched a Technical Revolution|publisher=Touchstone|year=1998|isbn=0-684-83529-0|url=https://archive.org/details/isbn_9780684835297|url-access=registration}}</ref>

== Overview ==
They were [[very high frequency]] search sets, installed on [[destroyer]]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]] (IFF) connections, and work with a [[Gyrocompass|gyro-compass]] repeater. SC-2 and SC-3 also have [[Plan position indicator|PPI]] scopes, remote PPI's, and built-in BL and BI*antennas.<ref name=":0">{{Cite web|title=US Radar: Operational Characteristics of Radar Classified by Tactical Application|url=https://www.history.navy.mil/research/library/online-reading-room/title-list-alphabetically/u/operational-characteristics-of-radar-classified-by-tactical-application.html|access-date=2022-02-18|publisher=Naval History and Heritage Command, US Navy|language=en-US |date=1 August 1943}} {{PD-notice}}</ref>

With antennas at 100', SC and SC-1 (without [[preamplifier]]) have a reliable maximum range of 30 miles on [[medium bomber]]s 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 (angle)|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.<ref name=":0" />

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 [[Pound (mass)|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]]s.<ref name=":0" />

One operator per shift is minimum on all 3 sets. SC and SC-1 require primary power of 1500 [[watt]]s at 115 [[volt]]s, 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 generator|AC]] or 220 volts AC; [[Motor–generator|motor generator]] if ship's power is [[DC generator|DC]].<ref name=":0" />

== On board ships ==

=== {{Flagicon|United States|variant=naval}} United States ===
* [[Essex-class aircraft carrier]]
* [[Independence-class aircraft carrier]]
* [[Yorktown-class aircraft carrier]]
* [[Avenger-class escort carrier]]
* [[Casablanca-class escort carrier]]
* [[Long Island-class escort carrier]]
* [[Iowa-class battleship]]
* [[South Dakota-class battleship (1939)|''South Dakota''-class battleship]]
* [[Colorado-class battleship]]
* {{USS|Tennessee|BB-43}}
* [[New York-class battleship|''New York''-class battleship]]
* {{USS|Arkansas|BB-33}}[[File:USS Sicard (DD-346).jpg|thumb|SC-1 aboard {{USS|Sicard|DD-346|6}}]]
* [[Gearing-class destroyer]]
* [[Allen M. Sumner-class destroyer]]
* [[Fletcher-class destroyer]]
* [[Gleaves-class destroyer]]
* [[Benson-class destroyer]]
* [[Sims-class destroyer]]
* [[Benham-class destroyer]]
* [[File:USS Peterson (DE-152) at Key West in October 1962.jpg|thumb|SC-3 aboard {{USS|Peterson|DE-152|6}}]][[Somers-class destroyer]]
* [[Bagley-class destroyer]]
* [[Porter-class destroyer]]
* [[Mahan-class destroyer]]
* [[Farragut-class destroyer (1934)|Farragut-class destroyer]]
* [[Wickes-class destroyer]]
* [[Sampson-class destroyer]]
* [[John C. Butler-class destroyer escort]]
* [[Rudderow-class destroyer escort]]
* [[Buckley-class destroyer escort]]
* [[Edsall-class destroyer escort]]
* [[Chiwawa-class oiler]]
* [[Kennebec-class oiler]]
* [[Patapsco-class gasoline tanker]]

=== {{Flagicon|Australia|variant=naval}} Australia ===
* {{Sclass2|River|frigate}}

== Gallery ==
<gallery mode="packed">
File:HMAS Condamine (300544).jpg|SC-1 aboard {{HMAS|Condamine|K698|6}}
File:Bridge of USS Cowpens (CVL-25), circa in November 1943 (80-G-K-527).jpg|SC-2 aboard {{USS|Cowpens|CVL-25|6}}
File:SC radar of USS Niobrara (AO-72) c1953.jpg|SC-3 aboard {{USS|Niobrara|AO-72|6}}
File:Forecastle of USS Kidd (DD-661) at Baton Rouge, Louisiana (USA), on 26 August 1988.jpg|SC-3 aboard {{USS|Kidd|DD-661|6}}
File:SC-radar of USS Rio Grande (AOG-3) in the early 1950s (7574664).jpg|SC-3 aboard {{USS|Rio Grande|AOG-3|6}}
</gallery>

== See also ==

* [[List of radars]]
* [[Radar configurations and types]]
* [[Surveillance radar approach|Surveillance radar]]

== Citations ==
<references />

== References ==

* [[Norman Friedman]] (2006). ''[https://books.google.com/books/about/The_Naval_Institute_Guide_to_World_Naval.html?hl=ja&id=4S3h8j_NEmkC 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 Pictures|Touchstone]]. {{ISBN| 0-684-83529-0}}
* Hezlet, Arthur (1975). ''Electronics and Sea Power. New York: Stein and Day''. {{ISBN|0-8128-1811-3}}

[[Category:Naval radars]]
[[Category:World War II radars]]
[[Category:Military equipment introduced from 1940 to 1944]]
[[Category:Military radars of the United States]]

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HMAS Condamine (K698) (edit)
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USS Niobrara (AO-72) (edit)
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USS Sicard (DD-346) (edit)
USS Tennessee (BB-43) (edit)
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