What does a lateral mark indicate?

A lateral mark is specifically designed to indicate the sides of a navigable channel and provide information about the safe passage of ships. These marks are part of the IALA Maritime Buoyage System and help vessels navigate safely through channels. The colors and shapes of the marks indicate whether the mark is on the port or starboard side of the channel, guiding mariners safely as they enter or traverse through navigable waters.

In this context, a lateral mark does not signify areas restricted to speed, hazards to shipping, or the end of a channel; instead, its primary function is to delineate safe water boundaries and guide vessels, making it critical for navigation.