Im not sure if fleet boats carried radar warning recievers or the like. The Japanese didnt fit radar to many ships until relatively late in the war (although some of their long range search planes carried an early set in the nose) and even then they never mastered its use like the Allies or even the Germans. infact AFAIK most Japanese radar technology was copied from German examples shipped in by U boats and I boats.
So I don't think the USN saw the need to fit this type of equipment, or at least no specialised equipment for the detection of enemy radar.
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