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Rules of the Road

Rule 21-International only

Lights & shapes

Definitions

(a) "Masthead light" means a white light place over the fore and aft centerline of the vessel showing an unbroken light over an arc of the horizon of 225 degrees and so fixed as to show the light from right ahead to 22.5 degrees abaft the beam on either side of the vessel

(b) "sidelights" means a green light on the starboard side and a red light on the port side each showing an unbroken light over an arc of the horizon of 112.5 degrees and so fixed as to show the light from right ahead to 22.5 degrees abaft the beam on its respective side. In a vessel of less than 20 meters in length the side lights maybe combined in one lantern carried on the fore and aft centerline of the vessel.

(c) "Sternlight" means a white light placed as nearly as practical at the stern showing an unbroken light over an arc of 135 degrees and so fixed as to show the light 67.5 degrees from right aft on each side of the vessel.

(d) "Towing light" means a yellow light having the same characteristics as the "sternlight" defined in paragraph (c) of this rule.

(e) "All-around light" means a light showing an unbroken light over an arc of the horizon of 360 degrees.

(f) "Flashing light" means a light flashing at regualr intervals at a frequency of 120 flashes per minute.

Whew! That was a lot of typing! See Rule 21-Inland for additional lights pertaining to inland rules.

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Q: What are the lights in a boat classified as Navigation Lights?
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Related questions

What type of boat reqires navigation lights?

All boats operating between sunset and sunrise.


What type of boat requires a navigation lights?

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What must a 14 foot power boat carry between sunset and sunrise?

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You are operating a powerboat at night you see res and white lights on another boat what do these lights tell you?

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all boats operating between sunset and sunrise. - jr


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What is a legal requirement for boat operation?

Each country has their own legal requirements regarding boat operation. The requirements state the specifics about navigation lights and which type of vessels need them, which types of lights are needed, and the hours of the day they must be used.


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What navigation lights must a pleasure sailing craft of less that 20 meters in length exhibit between sunset and sunrise?

This boat must have a white mast head light & a white stern light. Also, it must have a green running light on the right (starboard) side of the boat & a red running light on the left (port) side of the boat. The red & green lights may be mounted on the sides of the boat (international regs.) or nose of the boat if the boat is basically used on rivers or lakes in the U.S. (called: river navigation lights).


Do you have to have red and green lights on your boat?

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