IIRC we sold a
bunch of 1666Bs to the US Navy in YUK/something
nomenclature).
1666s are known as AN/UYK-64.
Yes and the 1602 was the AN/UYK-19.
land and ship installations, thus the "U".
If they were primarily for
aircraft installations, they would have been "AN/A**" and not
"AN/U**"
(and also not so freaking heavy!).
Just out of curiosity: Is there an explanation, what the other
letters Y and K mean?
Erik.