Surveyor-Model was a dummy mass onbaord of Centaur AC-4, launched on 11 December 1964, which was to test the closed loop Honeywell guidance system and perform the first restart of cryogenic RL10A-3 engines in space. December 11, 1964 at 14:25 UTC · Launch Successful Atlas LV-3C Centaur — United States Air Force, to Low Earth Orbit Launch Complex 36A, Cape Canaveral SFS, FL, USA The world's 388th orbital launch attempt, and 95th of 1964. Data: Launch Library 2, The Space Devs.