Navigation General · Dead Reckoning
Which of the following is the best definition of a Dead Reckoning (DR) position?
- AA position advanced from a known position using only course and speed, without current correction✓ Correct
- BA position obtained by two or more simultaneous lines of position
- CA position obtained by applying estimated current to a DR position
- DA position confirmed by GPS and visual bearings
Explanation
A DR position is determined solely by applying course and speed from a previously known position. It does not account for current, leeway, or other external forces. When current is applied, the result is an Estimated Position (EP).
Authority: Bowditch (Pub. 9), Ch. 7
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