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Dead Reckoning Computer of Everett Bratcher

@ Missouri Historical Society

G. Felsenthal and Sons


This tool is a good representation of Everett Bratcher's 35 year cartographic career at the Defense Mapping Agency, as well as his 3 years serving as a Tuskegee Airmen with the 332nd fighter group in World War II and his lifetime interest in air and sea navigation. These flight computers are a form of circular slide rule used in aviation during flight planning to aid in calculating fuel burn, wind correction, and time en-route. In the air, the flight computer can be used to calculate ground speed, estimated fuel burn, and updated estimated time of arrival.
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Record Contributed By

Missouri Historical Society

Record Harvested From

Missouri Hub