USCG Exam PracticeCourse to steer to compensate for current
According to standard DR plotting rules, a new DR position must be plotted at which of the following times?
- A. Only when a fix is obtained
- ✓ At every course change, every speed change, at each fix, and at least once per hourCorrect
- C. At every course change and at least once every two hours
- D. At every speed change and whenever the vessel enters pilot waters
Why B is correct
Bowditch Ch. 8 §801 specifies that a new DR position is plotted at every course change, every speed change, at the time of each fix, and at least once each hour — more frequently in pilot waters. All four conditions are required.
Cited:Bowditch Ch. 8 §801