On July 24, 1954, the Naval Research Laboratory (NRL) at Stump Neck, Maryland (now the Naval Surface Warfare Center in Indian Head, Maryland) sent and received the first human voice transmission to be bounced back to Earth from the Moon.
Moon bounce, also known as Earth-Moon-Earth (EME) communication, is a technique that sends radio wave transmissions from Earth to the Moon. The transmission is then reflected, or bounced, off the surface of the Moon and captured by an Earth-based receiver. The technology held promise for secure communications with Navy ships.
By January 1956, the U.S. Navy could transmit teletype signals to and from Stump Neck and Wahiawa on the island of Oahu, Hawaii. By January 1960, the Navy’s Communication Moon Relay System began transmitting two-way radio communications.