[1] Uniquely, East Coast Relay was linked to its associated radio transmitter and receiver sites in Woodbridge, Virginia and La Plata, Maryland, respectively, by a tropospheric scatter system.
[4] Midwest Relay provided service within the continental United States and linked the east and west coast stations.
[5] Overseas primary relay stations were established in Japan, the Philippines, Hawaii, Alaska, Eritrea, and Germany.
Secondary overseas stations were provided in Okinawa, Taiwan, South Korea, Cyprus, Turkey, Italy, Germany, France, the Panama Canal Zone, and the United Kingdom.
[2] Message transmission used a variety of means, including radio, coaxial cable, and wire systems operated by the Signal Corps and AT&T.