Apollo 15 "Guidance and Navigation Summary" manual by Delco Electronics, used by the MIT representative in the SPAN (Spacecraft Analysis) Room, 5.5 x 8.5, annotated on the front cover, "SPAN Room, MIT," and on the spine, "SPAN Room Record Copy (Data), Apollo 15." The manual has sections on "CM Software," "LM Software," "ASPO 45 CRT Displays," "Launch and Burn Schedule," "Burn Perturbations," "Science," and "Hardware," and contains numerous diagrams, instructions, lists, and code definitions related to the guidance and navigation systems used on the Apollo 15 lunar landing mission. Several pages in the "P52—IMU Realign (CM)" section were heavily annotated during the mission, in addition to a few other pages. In fine condition, with light wear from use. From the Don Eyles Apollo Computer Collection.
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