Our chartplotters are sized for easy installation and many are differential ready for improved accuracy. We also carry several hand-held GPS which are great on, and especially off the water. These units contain specialized databases of North and South American roadways and general landmarks. Many basemaps include state and country boundaries, lakes, rivers, streams, airports, cities, towns, coastlines, and U.S. state, and interstate highways. All units also accept more detailed road and landmark information from specialized digital cartridges.
CDs are also compatible with personal computers.
They provide street level mapping detail-even giving you access to business listings and points of interest. Electronic Charts Electronic charts are digital replicas of paper charts. They are very convenient because they contain a large number of paper charts, sometimes 50 or more, on one cartridge. You can easily scan through the chart using your GPS or personal computer. Electronic charts are, however, only an aid to navigation.