One minor nit. The phrase “dead reckoning” likely did not come from “deduced” but more likely from “dead right” and similar expressions, though this is a commonly repeated explanation.
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Before GPS: How Did Pilots Navigate in the Early Days of Aviation?
Before GPS, pilots used several navigation methods. These include pilotage, dead reckoning, the beacon station system, radio ranges, radar, and INS. Future systems will leverage computer power, broadband connectivity, and AI.
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