Chart Datum

Chart Datum is a reference point used in nautical charts and maps to indicate water depths and heights. It represents a fixed level that helps sailors understand how deep the water is at any given location. This level is usually based on the lowest expected tide, ensuring that navigational information remains reliable even during low water conditions. By using Chart Datum, mariners can safely navigate and avoid submerged hazards. It is crucial for safe navigation, as it provides a consistent framework for understanding the depth of water and the height of nearby land or structures.