Public Vessel Operators License Practice Exam

When should you assume a risk of collision exists?

In doubt At all times Only when it is dark Never

Correct Answer:

Only when it is dark

Explanation:

When visibility is limited, you cannot rely on seeing and predicting another vessel’s actions with confidence. Darkness reduces sight, sensor accuracy, and the ability of other boats to signal their intentions, so you should assume there is a risk of collision and take proactive steps to avoid it. That means slowing down to a safe speed, keeping a proper lookout, and using all available means to maintain a safe passage. The emphasis on darkness reflects how the level of risk rises when you can’t clearly observe other traffic. In daylight you may see more clearly, but vigilance remains important; the question highlights the condition where the risk is most evident and requires you to act as if a collision could occur.

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