The lights prescribed by these Rules shall, if carried, also be exhibited from sunrise to sunset in restricted visibility and may be exhibited in all other circumstances when it is deemed necessary.
means a white light 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.
means a green light on the starboard side and a red light on the port side
means a white light placed as nearly as practicable at the stern
means a yellow light having the same characteristics as the “sternlight” defined in paragraph (c) of this Rule.
means a light showing an unbroken light over an arc of the horizon of 360 degrees.
means a light flashing at regular intervals at a frequency of 120 flashes or more per minute
It is illegal to operate between sunset and sunrise and during periods of restricted visibility (fog, heavy rain, or heavy snow) unless properly fitted with navigation lights.