USCG Exam PracticeCourse to steer to compensate for current
A vessel's DR position at 1200 places her at a known point. The current is setting 270°T at 2 knots. After 1 hour, the navigator lays off the current vector from the DR position. Where is the resulting estimated position relative to the DR position?
- A. 2 miles to the east of the DR position
- ✓ 2 miles to the west of the DR positionCorrect
- C. 2 miles to the north of the DR position
- D. 2 miles to the south of the DR position
Why B is correct
Set 270°T means the current flows toward 270°T, which is due west. With a drift of 2 knots over 1 hour, the current displaces the vessel 2 miles to the west of the DR position. The EP is plotted at the end of that vector.
Cited:Bowditch Ch. 8 §803