USCG Exam PracticePassing distance and CPA from chart plot
According to the Navigation Rules, risk of collision is deemed to exist when compass bearings of an approaching vessel show what characteristic?
- ✓ Bearings remain constant and range is decreasingCorrect
- B. Bearings are increasing and range is decreasing
- C. Bearings are changing and range is decreasing
- D. Bearings are decreasing and range is constant
Why A is correct
Bowditch Ch. 7 §704 states that if the bearing remains constant and the range is decreasing (CBDR — Constant Bearing, Decreasing Range), risk of collision exists. A changing bearing does not by itself eliminate risk, but CBDR is the canonical indicator.
Cited:Bowditch Ch. 7 §704