A nautical chart is a graphical representation of maritime areas and adjacent coastal regions. It provides essential information for navigation, including water depths, the location of hazards, and the positions of navigational aids like buoys and lighthouses. These charts are crucial for safe passage at sea, helping mariners avoid dangers and plan their routes effectively. Nautical charts can be produced in various formats, including paper and electronic versions. They are created using data from hydrographic surveys, satellite imagery, and other sources. Mariners must regularly update their charts to ensure they have the most accurate information for safe navigation.