Dead Reckoning Computer of Everett Bratcher
@ Missouri Historical Society
G. Felsenthal and Sons
DescriptionThis 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.