Lateral markers are navigational aids that mark:

Lateral markers serve a critical function in navigation by indicating the edges of safe water areas. They are used to delineate navigable channels and to guide boaters safely through bodies of water. Typically, these markers are placed along the sides of the navigable channel, showing boaters where it is safe to travel and where they should avoid shallow or hazardous areas.

These markers often come in specific colors and shapes according to established standards. For instance, in the United States, green markers usually indicate the left side of the channel when entering from the sea (port side), while red markers indicate the right side (starboard side). This system helps to ensure safe navigation by clearly defining safe passages, thus preventing potential groundings or collisions.

A misunderstanding of the role of lateral markers may arise from confusing them with other types of navigational aids which indicate danger or specific areas such as shallow water or hazards. However, lateral markers specifically focus on guiding vessels safely through channels by marking the boundaries of navigable waters.