What is the purpose of a "navigational chart"?

The purpose of a navigational chart is to plot courses and understand navigable waters and their features. Navigational charts are essential tools for mariners, as they provide detailed information about water depths, submerged hazards, navigational aids such as buoys and lights, coastlines, and other geographical features that are critical for safe navigation. They help mariners determine the safest routes and assist in avoiding potential dangers while on the water.

In addition to course plotting, navigational charts also help in identifying the characteristics of the water body, such as the type of bottom composition and tidal information, which are pivotal for route planning and anchoring decisions. The data presented on these charts is meticulously compiled to ensure it meets the navigational needs of vessels, making them indispensable for effective voyage planning and execution.