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Maduro- besides the great info provided by Vasco, you might also want to consider all the interfaces that you may want to accomplish with your electronics. We have the Raymarine C-80, seatalk instruments, and the SR-161 AIS. All of this is also interfaced with our computer (as a back-up navigation program), SSB/Pactor modem, and gps data to our VHF and SSB. The raymarine output needs to be set on a high-speed baud rate for the AIS, which is incompatible with the gps and sea-talk data going to the computer and other instruments. As a result, we had to install a multi-plexer (no big deal, but another piece of equipment and expense). We know that the set-up with Raymarine will work... you might want to see if Garmin will support your overall needs. And the your cruising area might also be a factor in deciding what charts will work best for you. At the time of our purchase, navionics was better for the south Pacific. In Mexico, we find the electronic charts to be up to a couple of miles off. No big deal, in that we wouldn't want to rely on the accuracy of those charts in close quarters. In limited visiblity, radar is much better.
If I were to replace our system, I wouldn't totally rule out Raymarine, but I would sure look at Garmin and others.
Steve
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