( to continue...) 

However both different setups endured in place during the war. Pete Peterson of Seattle WA told me he postwar flew PBY being given to Philippine Navy; this AC had the original GO-9 with RU receivers.

I guess that makes 3 variations:

GO with RU

GO with 3x  RAX receivers

BC-348 with ATC / ART-13 ( some retrofit from earlier standard, pehaps later became the standard ? )

-Hue Miller