In restricted visibility, what should you do to reduce collision risk?

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In restricted visibility the priority is to minimize collision risk by staying as aware as possible and communicating clearly. You should slow to a safe speed appropriate for the conditions so you can stop or maneuver in time if another vessel appears suddenly or its path changes. Maintain a strict look-out at all times, not relaxing vigilance, and actively monitor for other vessels’ lights, shapes, wakes, and any changes in bearing or speed.

Using radar adds a critical layer of detection beyond what you can see with the naked eye, letting you identify targets, determine their range and approach, and track their movements even when visibility is poor. AIS provides additional information about other vessels’ identities, courses, speeds, and intentions, helping you assess risk early. Sound signals are an important means of communicating your presence and intentions to other vessels that may not be visually detectable, which helps prevent misunderstandings and collisions.

Choosing to go faster ignores the fundamental need to be able to react promptly, and turning off radar or relying solely on visual cues removes key tools for detecting and understanding risk. Ignoring sound signals eliminates crucial communication that can avert close quarters situations.