Plotting Board Mark 7 MIL-B-5046B MiG-21 Here is a WWII-era Pilots'

Here is a WWII-era Pilots' Information File published by the US Army Air Force with revisions through April 1945

as well as civilian aircraft DeHavilland Comet and Vickers Viscount

as well as for radar sets AN/APS-3 and - 4

published in October 1939

and the other for Outside pressure/altitude

Plotting Board Mark 7 MIL-B-5046B MiG-21 Here is a WWII-era Pilots'This is an authentic US Navy pilot's Chart Plotting Knee Board Mark 7 (MIL B 5046B), likely 1950's to Vietnam War era. Likely designed for a jet aircraft (note fuel is measured in lbs), this 9. 5 x 7 x 1 inch device included the flight computer on the face with a rotating card for determining the critical factors impacting the planned flight. By depressing a button in the lower right corner, the top flips open to reveal a map compartment, clips for