Portable radios are provided only for communication directly with aircraft to enhance flight safety. Radios can be operated aircraft-to-aircraft or air-to-ground. Unit to unit communication on land or on the same ship is not approved. No separate license is needed in the United States for operation as an aircraft station.
Frequencies are selectable for any Aviation VHF communication:
Examples:
122.900MHz Activities of a temporary, seasonal, emergency nature or search and rescue, as well as, airports with no tower, FSS, or UNICOM.
122.925MHz Forestry management and fire suppression, fish and game management and protection, and environmental monitoring and protection.