I have a Garmin 76C(color) hand held that I have been having since they first come out with color hand helds. Still going strong. Can hook up laptop and customize or download maps to the GPS and your coordinates to the Laptop for storage in case they get wiped out. You can also customize routes. It is for land and water. Shows ranges, day markers, hazards, normal water levels and buoys. Just like looking at a chart.
It is waterproof. The newer ones have to be better now, I think I bought this one in 2000 or 2001.
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