122Mhz is an aircraft freq, so probably also used for/by CAP (Civil Air Patrol) when an aircraft has crashed. The frequency range of 148-150 is also used for MARS/CAP, at one time there was a statewide setup on 148.150 with several repeaters along the front range, not sure if that is still being used for by them. ?? They would usually hold a "net" weekly, kind of like ARES, where each station would check in. Kind of cool to listen to..... They would go to each repeater North to South (about 20 or so).