BOTH INTERNATIONAL & INLAND To determine if risk of collision exists, a vessel which is fitted with radar must use which observation technique(s)?

Correct Answer: Option D — All of the above

Rule 7(b) mandates that proper use shall be made of radar equipment, including radar plotting or equivalent systematic observation of detected objects. Combining radar scanning, plotting, and visual compass bearings ensures a comprehensive assessment of the situation, fulfilling the requirement to determine if risk of collision exists.