USCG Exam Practice · Estimated position from current set & drift
Dead reckoning (DR) is best described as which of the following?
- ADetermining position by the intersection of two or more simultaneous lines of position
- BAdvancing a prior LOP along the DR track to obtain a running fix
- CDetermining position by applying course steered and distance run from a known starting point✓ correct
- DDetermining position using the vector sum of course made good and the current vector
Why C is correct
Bowditch Ch. 1 §102 defines dead reckoning as the determination of position by applying course steered and distance run from a known starting point. DR accuracy degrades over time and must be confirmed by external fixes.
Cited:Bowditch Ch. 1 §102
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