Mounting bracket for the Crewman Optical Alignment Sight (COAS), measuring 6 x 6 x 2, with part numbers reading, "03953 MFR 34758, V620-660721-001, 34758HEC0000006," and a date of January 23, 1976. In fine condition. Onboard the Space Shuttle, the COAS was mounted at the commander's station so the crew could check for proper attitude orientation during ascent and deorbit thrusting periods. For on-orbit operations, the COAS at the commander's station was removed and installed next to the aft flight deck overhead right minus Z window.
Terms and abbreviations used in our descriptions.