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A chart plotter is an interactive, electronic version of a traditional admiralty marine chart which is used for navigation. This gives an accurate depiction of the ship’s position at any time and displays position, speed and heading. This can be used for safe passage planning as well as showing the contours of the seabed beneath the ship.

In addition, a chart plotter can be integrated with AIS, radar, echo sounder and all other ship’s sensor systems with current technology offering a full 3D display of the seabed at any point.

A marine GPS chart plotter receives information from the GPS antenna fitted to the ship. The signals from several satellites are correlated to achieve the best location accuracy. The current Latitude and Longitude is displayed on the chart plotter at any time as well as a dynamic icon of the current ships position.

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