I have often had a difficult time trying to import a large number of GPS waypoints into my Garmin chart plotter. To make the task a little easier, I just completed a quick and dirty CSV to GPX converter. Once you have converted your data, you can import the file into Garmin HomePort and finally upload it to your chart plotter unit.
I hope the following can save you the time that I have wasted over the years trying to input waypoints one-at-a-time.
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