There are many reasons why a Chartplotter with integrated mapping or a chart card preloaded may need '
Garmin marine map updates.' Water charts are updated less often since fewer organizations collect data for them. If the chart displays problems, it is time to update to the most recent chart. Reporting chart faults, incomplete information, or new features using location coordinates assists in the improvement of charts. They also expedite the process of implementing these changes in the chart or other files.