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during periods of restricted visibility
all boats operating between sunset and sunrise. - jr
All around white light
AT NIGHT!30 minutes prior to sundown and thirty minutes after sunup
They must only carry a working flashlight!
Navigation lights must be on during periods of restricted visibility.
Any vessel over 7 meters is required to show Navigation lights between sunset to sunrise and in any times of restricted visibility. See Rule 20, Application. For a full list of Navigation Rules, see the link below.
In accordance with rule 28 of the 72 COLREGS a vessel 'constrained by her draft' shall display 3 red lights vertically in addition to other navigation lights. Please see the link provided below.
Warship use the same navigation lights as civilian ships. Additional lights may be shown if engaged in special duties.
Navigation lights
On power-driven vessels, navigation lights must be on during periods of restricted visibility.
On power-driven vessels, navigation lights must be on during periods of restricted visibility.