Apollo 4 (also known as AS-501) was the first uncrewed test flight of the Saturn V launch vehicle, the type used by the U.S. Apollo program to send the first astronauts to the Moon. The space vehicle was assembled in the Vertical Assembly Building, and was the first to be launched from Launch Complex 39 at the KSC.

These Block I Rope Memory Modules were installed in the AGC onboard the command module, and were critical in initiating major modes which were dependent upon trajectory or guidance functions. They were recovered from the Command Module after splashdown, and ended up in Virgil Redgate’s warehouse in Texas in 1976, where they were saved by Jimmie Loocke.

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