USCG Exam PracticeEstimated position from current set & drift
To construct an estimated position (EP) from a DR position, the navigator lays off which vector from the DR position?
- A. The vessel's course steered and speed through the water for the elapsed time
- ✓ The current's set and drift for the elapsed timeCorrect
- C. The course made good and speed over ground for the elapsed time
- D. The leeway angle and wind speed for the elapsed time
Why B is correct
Bowditch Ch. 8 §803 directs the navigator to lay off the current's set and drift for the elapsed time from the DR position; the end of that vector is the EP. The DR position already accounts for course steered and speed through the water.
Cited:Bowditch Ch. 8 §803