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David Hoag
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<p>David Garratt Hoag (October 11, 1925 – January 19, 2015) was an American aeronautical <a href="/facts/Engineer/ph4TnHnG">engineer</a> who was Director of the <a href="/facts/Apollo_Program/IC1Ek1Ao">Apollo Program</a> at the <a href="/facts/Massachusetts_Institute_of_Technology/Xk49vNA8">Massachusetts Institute of Technology</a>'s Instrumentation Laboratory, later renamed the <a href="/facts/Charles_Stark_Draper_Laboratory/prxprY9L">Charles Stark Draper Laboratory</a>. The Program was responsible for the Apollo Primary Guidance, Navigation, and Control Systems on the Apollo command module and the lunar landing spacecrafts. The Guidance and Navigation system included an inertial measurement unit, optical alignment telescope and space sextant, and <a href="/facts/Apollo_guidance_computer/xGxHlrXY">Apollo guidance computer</a>, which was used during the <a href="/facts/Apollo_missions/2oI52KsN">Apollo missions</a>. </p>