Required Lighting at Night


Navigation lights (red and green sidelights, white sternlight, and masthead light) must be used from sunset to sunrise and in low-visibility conditions, per state and federal rules.

Related Terms

Overnight Mooring

Anchoring or attaching to a buoy/dock for an extended stay, often overnight. Requires proper ligh...

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Night Vision Devices

Thermal or low-light scopes or goggles aiding nighttime navigation; boater ed covers proper usage...

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Buoy System

The arrangement of lateral or non-lateral buoys indicating safe channels, hazards, or controlled ...

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Navigation Rules

The “rules of the road” for waterways, dictating right-of-way, overtaking procedures, and collisi...

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Operating in Fog

Techniques like sounding fog signals, reducing speed, and using radar or GPS to avoid collisions ...

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Spreader Lights

Elevated fixtures providing deck illumination on sailboats or larger craft. Boater ed warns of gl...

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Collision Avoidance

Strategies to prevent accidents, including early course changes, clear signals, and adherence to ...

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Underwater Lights

Decorative or functional lights mounted below the waterline; some states regulate brightness or c...

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Safe Speed

A velocity that allows adequate time to avoid collisions, considering visibility, traffic density...

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Sunset vs. Sunrise Definition

States or local rules define exact times for “sunset” and “sunrise” to enforce navigation light r...

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