Don't worry about fleets and that sort of stuff. If a system is Motorola Type I, then you need that stuff. Mostly all the Motorola systems have been switched to Type II and should need no special programming. Just enter the frequencies and enjoy. You should also let folks know your location because the country is big and there are a myriad of systems out there. Mainly military and civilian aircraft are AM, all the rest is FM and if there is a PL, you put that in, if DPL, put that in. MO for Motorola, etc.