Fog and Snow

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a vessel obscured by fog.

Fog is a common problem at sea. The major hazard is reduced visibility. Vessels should proceed with caution, and monitor radar carefully.

a vessel obscured by snow.

Snow also reduces visibility, and can be especially hazardous if it falls as melting snow. Melting snow not only reduces visibility, but interferes with radar signals making radar less effective. This usually occurs during arctic air outbreaks, and is a serious problem in mainland inlets.

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