AN/SPS-6 is a two-dimensional radar manufactured by Bendix and Westinghouse Electric. It was used by the US Navy as a first-generation air-search radar
AIMS IFF, and LFDM. AN/SPS-40C - SPS-40 upgraded to SPS-40B standard AN/SPS-40D - SPS-40A upgraded to SPS-40B standard AN/SPS-40E - SSTX upgrade, replaces
antenna (AN/SPS-29) looked like a bedspring. Larger ships used the 12.8 m wide AN/SPS-37 antenna - about twice as wide and half the height of the SPS-29 antenna