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Sign by the Gemini EVA umbilical. It reads


UMBILICAL CABLE: TETHER

Astronaut Ed White performed the first U.S. EVA (extravehicular activity), lasting 20 minutes, from Gemini 4 in 1965. He was secured to the spacecraft by a 25 ft gold plated umbilical cable which also connected the suit to the on-board communications and life-support systems. The hand-held self-maneuvering unit in his right hand helped him control his movements.


Despite what the sign seems to imply, the maneuvering gun Ed White used during his EVA is on display at Space Center Houston (although I currently have no pictures of the gun itself, I do have some pictures of the astronaut in the Gemini 5 display using a maneuvering gun). I do not know whether the USSRC's umbilical is the one actually used during the Gemini 4 mission.

Originally, the mission plan called for Ed White to reopen the spacecraft's hatch and jettison the EVA equipment after he had disconnected the umbilical and re-connected his suit directly to the spacecraft's environmental control system, but since he encountered difficulties closing the hatch after the EVA, the jettison procedure was scrubbed.

 
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Time picture taken Fri Jun 17 14:28:57 2005
Location picture taken Main Indoor Exhibit Gallery
"Old" Museum
US Space & Rocket Center
Huntsville, AL
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