Definitions for "Radios"
Keywords:  airfield, uhf, vhf, infantry, navy
FM radios were used primarily by the infantry, UHF by Army, Navy and Air Force aircraft, and VHF for Army command & control activities, ship-to-ship and local airfield towers. Most helicopters had all three types of radios, sometimes several of each.
The estimated number of radio receivers in use for broadcast to the general public, per 1,000 people.