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6.10 Position Referencing
6.10.2 Define:
(a) Ground Position;
The Ground Position is the position on the ground directly beneath the aircraft.
(b) Dead Reckoning (DR) Position;
A DR Position is the assumed ground position based on calculation.
The information used to arrive at the D.R. position is never totally accurate.
(c) Fix;
A Fix is the position of an aircraft determined by any method other than by direct observation.
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