However, on very small boats less than 7 meters in length (22 ft) that go no faster than 7 knots, the lights can be any all round white light.  On sailing or rowing dinghies on inland waters any light is all that is required. Even a flashlight is within the rules. These do not have to be certified.

Obviously that label is too large to fit on most navigation lights so the rule allows the label to be on the package the light comes in, and a shortened label is put on the light.

What this mean for you is that when you buy, ask about the certification.   Ask if the lights are labeled properly.  When you get the lights check them to see if they are labeled.

Put the correct certification label on the boat to indicate that you certify that the light meets the rules.

The most common violation concerning navigation lights is improper mounting of the lights.  Follow the manufacturers instructions to the letter.   Make sure the the lights are properly aligned with the centerline of the boat.   Do not mount lights below the sheer line of the boat. Lights mounted below the sheer line cannot meet the vertical sector requirements.  See note below.

Clarification: As of  Jul 2014 the Inland Navigation Rules have been amended to read the same as the International rules.  The International Rules do not allow lights to be mounted below the sheer. It says :

1. The sidelights of a power-driven vessel shall be placed at a height above the hull not greater than three quarters of that of the forward masthead light. They shall not be so low as to be interfered with by deck lights.

This means you cannot have the sidelights below the sheer line of the hull on a boat configured for international OR inland rules.  I repeat, on boats configured for inland rules you cannot use bullseye type lights below the sheer line.

Lights must not be obstructed by structure of the boat or by other things on the boat.  All around white lights must be visible 360 degrees around the boat.  Also there must be a one meter vertical separation between the side lights and masthead or all around white lights.  That means the all around white light must be 1 meter (39.3 inches) higher than the sides lights.

Also, make sure the red and green are on the correct sides. red - left (port) and green - right (starboard).  This sounds simple but I have seen it at boat shows.

Several years ago, at a major boat show, I found over ninety violations of navigation light regulations. It is too easy to do it wrong.

If you have questions about navigation lights call the
Coast Guard Office of Boating Safety
202-372-1077

Revised 04/23/2015 Copyright 2006