After the conclusion of the Gemini program, the Tracking Station provided extensive support for the Project Apollo missions to the Moon.

Because of Carnarvon's unique geographical position, it was used to uplink the trans-lunar injection command to the Apollo spacecraft and was the prime link for the last hours of re-entry to Earth.

When that project finished, the station ceased routine operations immediately after an Atmosphere Explorer-C satellite pass on 4 October 1974, but sufficient capability was retained for one final mission − the trans-solar insertion of Helios-A on 10 December 1974.

The main building was then used by Radio Australia, which was looking for a home after Cyclone Tracy put its Darwin installation out of commission in December 1974.

All tracking station equipment was removed and/or buried, and all buildings, with the exception of one small one now used by Telstra, were razed.