What type of information do non-lateral square markers provide?

Non-lateral square markers are primarily used to mark controlled areas. They often indicate places where specific regulations apply, such as swimming zones, speed limit areas, or areas designated for certain types of activities like fishing or boating.

In practical terms, these markers help boaters understand where they can operate their vessels safely and legally, promoting safety on the water. While they may also have implications for navigation and awareness of potential hazards, their main function is to signify areas with rules and restrictions rather than to navigate or measure distance. Therefore, the answer relating to navigation directions is less applicable since the primary intent of these markers is related to controlling access and activities rather than giving directional guidance.