*sigh**sigh* (that's a double sigh) .... AF jocks....... I’d guess A4 = light and A6/F14 = medium. But I can’t think of a Navy “heavy” off the top of my cranium.
Cheers,
John

In NAVAIR parlance:
Light= A-1, A-4, A-7 ...
Medium = A-6 (the one & only) ...

Heavy = A-3 or possibly A-5 Vigi in its original incarnation if you want to stretch reality a bit.
Check it: SAVE THE WHALE !!!
