program (canceled in 1969), and has since been used as the baseline for all high-altitude pressure suits worn by U.S. Air Force pilots, including for the U-2 and SR-71. It was also the basis for NASA's Advance Crew Escape System (ACES) pressure suit. On June 11, 2008, the David Clark Company was selected by the Houston, Texas-based Oceaneering International as a subcontractor for the manufacture of the new Constellation Space Suit system, in which its "Operation One" configuration, resembles the current ACES suit, but functions in the same manner as that of the Gemini suit. Specifications The suit family system included both parachute and flotation systems. For EVAs Gemini 4 used the Ventilation Control Module (VCM), for Gemini 8-12 the Extravehicular Life Support System (ELSS) was used. The ELSS was also designed to optionally supply autonomous life support though they never made it to EVA. Two oxygen supply packs were developed for it. One was the Extravehicular Support Package (ESP) (providing an hour's worth of life support), carried aboard Gemini 8 but not used, and the other for the Astronaut Maneuvering Unit (providing an hour's worth of life support), carried on-board Gemini 9 and to fly while tethered but was not used. The AMU was also meant to be launched and flown on-board Gemini 12, and to fly untethered from the Gemini spacecraft, but was scrubbed two months before the mission. Gemini suit family Gemini suit evolution is listed below. Images References External links Astronautix Page on G3C Suit Astronautix Page on G4C Suit Ed White's spacewalk American spacesuits Project Gemini