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The other side is a circular slide rule. Extra marks and windows facilitate calculations specifically needed in aviation. Electronic versions are also produced, resembling calculators, rather than manual slide rules. Aviation remains one of the few places that the slide rule is still in widespread use. Manual E6-Bs/CRP-1s remain popular with ...
Pilot balloon slide rules were used by meteorologists in weather services to determine the upper wind velocities from an ascending hydrogen or helium-filled pilot balloon. [27] The E6-B is a circular slide rule used by pilots and navigators. Circular slide rules to estimate ovulation dates and fertility are known as wheel calculators. [28]
Excel-O-Graph: pilot's navigational chronograph with rotating slide rule bezel, introduced in 1960; Flight Officer (a.k.a. Flying Officer in United Kingdom): pilot's wrist chronograph with world time zone calculator, introduced in 1939; Marathon Navigator: water resistant antimagnetic pilot's watch with rotating 12-hour bezel, introduced in 1984
After the war, Gallet began to sell the Flying Officer commercially, and it remained as a popular watch for military, commercial, and civilian aviators. Truman himself wore a Gallet Flying Officer during his terms as 33rd president of the United States (1945–1953), [ 4 ] now housed in the collection of the Harry S. Truman Presidential Library ...
A flight computer is a form of slide rule used in aviation and one of a very few analog computers in widespread use in the 21st century. Sometimes it is called by the make or model name like E6B, CR, CRP-5 or in German, as the Dreieckrechner.
In the 1940s, Breitling added a circular slide rule to the bezel of its Chronomat models. This bezel became most associated with the Navitimer, launched in 1954. [1] The name Navitimer comes from two words were used to describe its purpose: Navigation and Timer. [2]
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