Transit 5C-1 was similar to the Transit 5A series series but involved some redesign to improve performance. June 4, 1964 at 03:50 UTC · Launch Successful Scout X-4 — United States Air Force, to Low Earth Orbit Space Launch Complex 5, Vandenberg SFB, CA, USA The world's 325th orbital launch attempt, and 32nd of 1964. Data: Launch Library 2, The Space Devs. Image by U.S. Air Force (Department of Defense Image Use Policy) via The Space Devs.