Marine Surveyors Lexicon

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Please report any issues with this site to Lexicon Webmaster.

Side Lights


Green and red lights on the starboard and port sides of the boat, required for navigation at night.

Each light is supposed to be visible through an arc of 112.5°, beginning from directly ahead of the boat to a point 22.5° aft of the beam.