A chartplotter is a device used in marine navigation that combines a GPS receiver with electronic charts. It displays a boat's position on a digital map, helping sailors navigate safely and efficiently. Chartplotters can show various information, such as water depth, nearby hazards, and routes, making them essential tools for both recreational and commercial boating. Many modern chartplotters also include features like radar integration and sonar capabilities, enhancing navigation and fishing experiences. They often come with touchscreen interfaces for easy operation and can connect to other devices, such as smartphones and tablets, for additional functionality and updates.