Communication Moon Relay

Sailors on board the USS Hancock (CV-19) spelling out "Moon Relay." This picture was transmitted via Moon bounce as part of the official Navy inauguration of the system.

The Communication Moon Relay project (also known as simply Moon Relay, or, alternatively, Operation Moon Bounce) was a telecommunication project carried out by the United States Navy. Its objective was to develop a secure and reliable method of wireless communication by using the Moon as a natural communications satellite — a technique known as Earth–Moon–Earth communication (EME). Most of the project's work took place during the 1950s at the United States Naval Research Laboratory. Operation Moon Relay was spun off from a classified military espionage program known as Passive Moon Relay (PAMOR), which sought to eavesdrop on Soviet military radar signals reflected from the Moon.