Gene Kranz's three-ring binder containing comprehensive Skylab console material, marked on the spine, "SL Support Data, Kranz/Frank," with front featuring an official NASA photo of a chart marked "TACS [thruster attitude control system] Budget" and "Skylab may be near running out of gas." The binder contains a huge assortment of memorandums, graphs, schematics, and various info sheets and packets relative to all aspects of Skylab, many of which are annotated in ink or felt tip; the binder is divided by tabs marked "PWR," "Comm/Data," "APCS/TACS," "Life Spt/Therm," "Overlay," and "Cons." In very good to fine condition, with general overall wear from use. Accompanied by a certificate of authenticity from Farthest Reaches, which states that the binder was assembled and maintained on the MCC Console Bookcase of Flight Director Gene Kranz.