CXAM radar
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The CXAM radar system was the first production radar system deployed on United States Navy ships, operating in the mid-high VHF frequency band of 200 MHz. It followed several earlier prototype systems, such as the NRL radar installed in April 1937 on the destroyer Leary; its successor, the XAF, installed in December 1938 on the battleship New York; and the first RCA-designed system, the CXZ, installed in December 1938 or January 1939 on the battleship Texas. Based on testing in January 1939, where the XAF was more reliable, the US Navy ordered RCA to build six XAF-based units for deployment and then shortly thereafter ordered 14 more.
The CXAM-1 antenna aboard USS Ranger (CV-4) in November 1942
USS Northampton (CA-26) at Brisbane, Australia, on 15 August 1941, carrying an early CXAM radar on her foremast
USS Washington (BB-56) off New York City, New York, 21 August 1942, with CXAM-1 antenna visible top center
USS Chester (CA-27)
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USS Chester (CL/CA-27), a Northampton-class cruiser, was the second ship of the United States Navy named after the city of Chester, Pennsylvania.
USS Chester (CA-27), off the Mare Island Navy Yard, Vallejo, California, after torpedo damage repairs and overhaul, 2 October 1943.
Chester as completed, 1930
Chester in August 1942
Chester in October 1943 after repair of her torpedo damage