Navigation lights for boats at night

Specific lighting configurations are required for boats operating between sunset and sunrise or in times of restricted visibility.  It's your responsibility to make sure your boat shows the proper lights depending on its size and the waters on which you are operating.

The U.S. Coast Guard Navigation Rules, International-Inland encompasses lighting requirements for every description of watercraft. The information provided here is intended for power-driven boats and sailboats less than 20 meters (65.62 feet) long. The various options are illustrated.

Navigation lights should be checked prior to departing the dock, and you should always carry spare bulbs. The USCG doesn’t care if they were working when you left, only that they are working when required.

whose maximum speed cannot exceed 7 knots may exhibit an all-around white light (360 degrees) and, if practicable, sidelights instead of the lights prescribed above, in international waters only. 

Sailing vessels less than 7 meters may carry an electric torch or lighted lantern showing a white light to be displayed in sufficient time to prevent collision. If practicable, the lights prescribed for sailing vessels less than 20 meters should be displayed.

A canoe or kayak may display the lights prescribed for sailing vessels, but if not, must have ready at hand an electric torch or lighted lantern (flashlight) showing a white light to be displayed in sufficient time to prevent collision.