Mercury-Atlas 9

Mercury-Atlas 9 carried Gordon Cooper aboard Faith 7 from May 15 to 16, 1963. The final crewed Mercury mission completed 22 Earth orbits in approximately 34 hours and twenty minutes, the longest American spaceflight to that point. The duration required expanded tracking coverage and continuous mission-control support while allowing engineers and physicians to assess operations beyond a full day in orbit. Cooper performed eleven experiments, including Earth photography, observation of a flashing sphere released from the capsule, and an early slow-scan television test. He also ate and slept in orbit. A separate tethered-balloon experiment failed to deploy successfully. Late in the mission, electrical and control-system problems required Cooper to orient the spacecraft and initiate retrofire manually. He completed reentry and deployed the parachutes, landing in the Pacific near USS Kearsarge. His successful return concluded Mercury's flight programme and provided experience that supported the transition to the two-person Gemini missions.