I haven't been able to see in the Willow Grove A10 cockpit, but they have been using what they call UHF discrete 1 - 5. The freqs are as follows: 233.5500 Discrete 1 238.8500 Discrete 2 254.4500 Discrete 3 391.2000 Discrete 4 343.0000 Discrete 5 They also have a pre-programmed 20 ch UHF radio and a 14 ch VHF LO/HIGH radio. Rich - Reading, PA