What does a cardinal mark signify in the IALA system?

In the IALA Maritime Buoyage System, a cardinal mark is specifically designed to indicate the direction of safe water from a particular hazard or danger. This type of marking is crucial for navigators as it helps them determine navigable waters and avoid potential risks.

The cardinal marks are categorized into four directions: north, south, east, and west. Each type of cardinal mark has specific colors and light characteristics that signal the compass direction of safe water. For example, a north cardinal mark indicates safe water to the north of the mark, guiding mariners to steer clear of any dangers that lie to the south.

Understanding the meaning and purpose of cardinal marks is essential for safe navigation and helps ensure that vessels avoid hazards effectively.