How can you tell if a boat is approaching you at a greater risk of collision?

Determining the risk of collision with another boat is essential for safe navigation. The correct answer highlights that a boat approaching you at a constant angle indicates it is likely on a collision course. This behavior suggests that neither vessel is altering its path in a way that would increase the distance between them; thus, the relative positions are not changing, leading to the heightened possibility of a collision.

Observing a boat maintaining a constant angle means that you should closely monitor its trajectory and be prepared to take evasive action if necessary. The situation demands vigilance as the course of action may need to be adjusted if the other vessel continues on its path. Understanding this concept is crucial for effective maritime navigation.

The other options, while they may indicate potential risks, do not specifically confirm an imminent collision risk as clearly as the first choice. For example, a boat traveling at high speed could be either on a safe course or approach, depending on its angle relative to your vessel. Likewise, lights on a boat could signal its presence and intention but do not directly relate to its course or collision risk. A distracted operator may increase the likelihood of error but does not provide clear information about the boat's path in relation to yours.