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Dead Reckoning
A navigation method where the pilot calculates their current position by using a previously determined position, then advancing that position based on known speed, elapsed time, and course. It's a fundamental piloting skill used alongside electronic navigation.
Related Terms
- Dew PointThe temperature to which air must be cooled at constant pressure for saturation to occur. ATIS, ASOS, and AWOS reports include temperature and dew point; a small temperature-dew-point spread often signals possible fog, low ceilings, or carburetor icing risk.
- DME (Distance Measuring Equipment)An avionics system that measures the slant-range distance between the aircraft and a ground station in nautical miles. DME is often paired with VOR stations and used for instrument navigation and approach procedures.
- DownwindThe traffic-pattern leg flown parallel to the landing runway in the opposite direction of landing, typically opposite the upwind leg. Pilots configure, complete checklists, and plan spacing on downwind before turning base and final.
- DPE (Designated Pilot Examiner)An experienced pilot designated by the FAA to conduct practical tests (checkrides) for pilot certificates and ratings. DPEs evaluate applicants on behalf of the FAA Administrator.