[Anvart]

Originally Posted by M. Sarsfield

My pleasure. Just to be clear, when I said "loop", I was referring to the small loop antenna labeled as "IFF" in the game. The antenna could be rotated to fix the location of a radio/radar transmitting source.

Here's a link to what an APR-1 unit looks like. It was used with other AN/APA equipment, depending upon the application.

http://www.radiomilitari.com/apr1.html

OK.
One more plus in favour of NSS_IFF_01 rotation!?
You wish to tell, that IFF systems were absent on US submarines during IIWW...???
And more ...
Position NSS_IFF_02 antenna on Balao sub (in game) does not allow it to rotate ... Look first pic in #18 post ...