Important manual from MIT Charles Stark Draper Laboratory entitled "E-2448, Users' Guide to Apollo GN&CS Major Modes and Routines (Rev. 1), July 1970," bound in blue "Apollo Guidance, Navigation and Control" softcover wrappers. The foreword by Jack C. Reed defines its purpose: "The objective is to comprise all major modes, routines, and extended verbs defined by the Guidance System Operations Plan (GSOP) and to describe their operation, theory and interrelationships in sufficient detail for a crew member or mission controller to gain the prerequisite understanding on which to base a more rigorous study of specific, flight-particular details and procedures." Divided into nine sections, the guide offers an overview of programs associated with all aspects of spaceflight: "Prelaunch," "Boost/Ascent," "Coasting Navigation," "Targeting," "Powered Flight," "Alignment," "Entry/Descent," and "Additional Extended Verbs and Routines." In fine condition. From the Don Eyles Apollo Computer Collection.
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