This image depicts a high angle view of technicians working on the instrument unit (IU) component assembly for the SA-8 mission in Marshall Space Flight Center's building 4705. A thin, circular structure, only 1-meter high and 7.6 meters in diameter, the IU was sandwiched between the S-IV and Apollo spacecraft. Packed inside were the computers, gyroscopes, and assorted black boxes necessary to keep the launch vehicle properly functioning and on its course.
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