"Bob Nixon" wrote in message
...
The only nav-aids he has is
a GPS receiver-display and a required UART G force tripped box flying
out of now civilian Williams AFB. If he flew closer and or higher
toward Phoenix Sky Harbor airport he would be required to also have a
transponder so that the Sky Harbor GCA could track his airplane and
altitude and he'd have to tune his VHF radio to the GCA when in
..

If he is flying out of Williams Gateway, he is under the PHX Mode C veil.