Surveyor program
The pad LC-36B was hastily brought online, with an entirely successful AC-6 (vehicle 151D) launched on 11 August 1965 at 14:31:04 GMT. Although Centaur appeared flight-ready, the Surveyor program was delayed. Vehicles AC-7 and AC-10 were designated for the first Surveyor missions, with AC-8 to carry out one more test, which took place on 8 April 1966 at 01:00:02 GMT with a payload of 771 kg Surveyor mass model M-1. The Centaur's ullage motors failed again because they did not have enough propellant for the mission. It decayed on 5 May 1966. Seven Surveyor probes were launched, all on Atlas-Centaur.