USCG Exam Practice · Estimated position from current set & drift
Dead reckoning (DR) is best described as which of the following?
- ADetermining position by advancing a previous LOP along the DR track to the time of a new observation
- BDetermining position by applying course steered and distance run from a known starting point✓ correct
- CDetermining position using the vector sum of course made good and the current vector
- DDetermining position using two or more simultaneous lines of position
Why B is correct
Bowditch Ch. 1 §102 defines DR as the determination of position by applying course steered and distance run from a known starting point. Option A describes a running fix; option C describes current vector resolution.
Cited:Bowditch Ch. 1 §102
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