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Plotter, Drift, ca. 1918. Creator: CP Goerz130mm long, 105mm wide; gray anodized color; plastic guide; c.1918
Circular Slide Rule, William J. Powell, 1935. Creator: UnknownDuring the 1920s William J. Powell led a small group of black air enthusiasts in Los Angeles. He established the Bessie Coleman Flying Club in 1929
Plotting Board, Navy, Mark 3A, 1942. Creator: Felsenthal Instrument CoPlastic assembly: board, data card, map template; holder: aluminum
Dead Reckoning, E-6B, Prototype, 1942. Creator: Felsenthal Instrument CoSlide: yellow with green radials, computer: black plastic
Computer, Weems E-1B Navigational. Creator: Weems System of NavigationWhite plastic dead reckoning computer used for aerial navigation. The circular computer has three discs for ground speed, mileage and course