What is the primary purpose of a chart plotter?

The primary purpose of a chart plotter is to display the vessel's position on a digital map. This device combines GPS data with electronic nautical charts to provide navigators with accurate positioning and real-time updates on the vessel's course. This functionality allows mariners to navigate safely by showing their location relative to land, navigational aids, and other important features on the chart. A chart plotter enhances situational awareness and facilitates effective route planning, making it an essential tool for both recreational and commercial vessels at sea.

While various other tools and systems can provide information about weather, speed, fuel consumption, or even emergency contacts, they serve different purposes within the navigation ecosystem. A chart plotter's core function centers specifically on mapping the vessel's current position, making it fundamental to maritime navigation.