We were using SeaClear and will keep it on the computer. It got us down Florida's west coast over to the Keys and up to south of Miami with no problems, all new water to us. We ran it on the ship's computer....
http://purplesagetradingpost.com/sumner/macgregor-navigation/Compter-Nav-index.html
..underway with it connected at all times to an older Garmin 76S in the cockpit that didn't have maps on it, but the day's waypoints via SeaClear and that worked great.
We are now switching to OpenCPN and will use it in the same manner on both boats (computer and Garmin 76S and a low cost daylight display now in the cockpit.
One of the main reasons for switching was that it will display...
....currents and tides in pop-up windows. That is great to have in a place like Florida where having that info can make the day go a lot better. SeaClear will not show that info. We used the Garmin for tides, but had no current information and that can help a lot going in and out of cuts.
With one plug-in it...
http://www.nv-charts.com/nv_cd_boxes.php
... will also display NV-Charts so that would be very helpful if we go to the Bahamas at some point and like others have said other features are being added all of the time.
It is super easy to chart a trip with appropriate waypoints and download those to your chartplotter ahead of time or on the fly if you make a change during the day. I'm also looking forward to using it with AIS which our new radio has.
It is a good program. I have it and the NOAA charts on all of our computers and a couple GPS pucks for backup. I use it at home all of the time. People talk about their trips and such and I'll pull it up to see the area that they are discussing. Get it and start using it at home and when you are on the boat it will be easy.
I keep the charts in a folder called NOAA on the desktop and that way they are very easy to point to in the program and easy to copy them to other computers,
Sum
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