Most mil aero UHF, ie above 200 is going to be AM.
Most comms from 30~75MHz will be FM wide (not as wide
as comercial FM wich is 75KHz, but 50KHz
Most comms from 136~150 will be FM-N.
There are exceptions. I have heard SSB in
both the 30~75 range and above 200.

Good listening.
rec.radio.scanner mihgt be a better choice for this
topic. Thre ar some very sharp people over there.

Terry