Space Shuttle "Backup Flight System, GN&C, Flight Control Program Requirements Document" prepared by Rockwell International for release on October 5, 1979. Comprising over 700 pages, the document is separated by tabs marked "Intro," "Requirements," "Ascent Flight Control," "Descent Flight Control," "Jet Select," "RCS Downlist," "Flight Control Utility Functions," and "Verification." The document consists of numerous descriptions, tables, lists, and diagrams related to the Shuttle's Backup Flight System, Guidance, Navigation, and Control, and Flight Control systems. Housed inside a red Autonetics three-ring binder with spine marked "Drafting Room Manual." In very good to fine condition, with some missing pages and sections, wear to tabs and some page edges.