USCG Exam PracticeCourse to steer to compensate for current
A navigator labels a course line on the chart as 'C 270' above the line and 'S 10' below the line. What do these labels represent?
- A. C 270 is the compass course; S 10 is the distance run in miles
- ✓ C 270 is the true course steered; S 10 is the vessel's speed in knotsCorrect
- C. C 270 is the course made good; S 10 is the current drift in knots
- D. C 270 is the magnetic course; S 10 is the speed over ground
Why B is correct
Bowditch Ch. 8 §802 specifies that the course line carries the true course labeled as 'C 090' (or equivalent) above the line and the speed as 'S 8' (or equivalent) below. These labels refer to course steered in true degrees and vessel speed through the water in knots.
Cited:Bowditch Ch. 8 §802