G'day Capt Snooze,
That's another reason I doubt the "Army Navy" description of the designators. With specific aircraft radios they have the prefix to their designation, ie AN-ARC***
I know the PRC is Portable Radio Communicator, GRC is Ground etc and ARC is Aircraft. So the question goes begging why would you call a radio Army Navy when it is clearly designed for any of the services. I tend to like the eplanation of the AN being a US designation, just as ours was generally F as in the F1 radio.
You certainly go back further than me in RASigs. I did my Op Kbd course in 80 and Op Rad in 82 at Watsonia. An establishment run by some of the most uptight individuals ever to don khaki.
