What does "risk of collision" refer to?

"Risk of collision" refers to a situation when an approaching vessel maintains a collision course. This concept is essential for navigational safety, as it indicates that two vessels are on a trajectory that could lead to an impact if no action is taken to avoid it. Recognizing when there is a risk of collision allows operators to assess the situation and determine the necessary maneuvers to prevent an accident.

Option A suggests a scenario where vessels are safely distanced, which would not represent a risk of collision. Option C, indicating vessels moving in opposite directions, could involve a risk if they are on a converging path, but merely being in opposite directions does not inherently mean a collision is imminent. Lastly, option D, mentioning a vessel that is moored, is not relevant to the concept of collision as a moored vessel is not in motion and thus cannot contribute to a risk of collision with other moving vessels. Understanding the implications of a collision course is vital for maintaining safety on the water.