Official NASA checklist entitled "Apollo X-LM-4, Final, Contingency Checklist" used by Russell A. Larson of MIT's Instrumentation Laboratory, contained within a hardcover loose-leaf binder, prepared by the Manned Spacecraft Center's Spacecraft Systems Branch, 6.5 x 9, April 26, 1969, marked on the front cover in felt tip, "R. Larson." Stamped on the front and inside as received by J. L. Nevins and R. A. Larson. The checklist contains various emergency procedures and instructions, as well as two pages of changes to the Flight Crew G&N Dictionary (with cover, also annotated "R. Larson"), and three pages of star charts. A few pages have been annotated with changes or additions to procedures and instructions. In fine condition, with light general wear from use. Russ Larson worked as a project manager and astronaut liaison at MIT's Instrumentation Lab, where he was involved in programming the Lunar Module's Apollo Guidance Computer; he worked directly with the astronaut crews, training them on the simulators and guidance system. From the Don Eyles Apollo Computer Collection.
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