No offense to you or anything, but I think the fact that you can navigate a boat from your laptop takes away from the experience completely and is demeaning to the ancient art of sailing.  I sailed on a tall ship for 2 weeks this past summer, and everything we did , navigation and everything, was using old fashioned shit, no GPS or laptop.  I just pissed me off when we would pull into port and see a bunch of rich faggots sitting there who just had to push a switch to do everything.  You might as well buy a big ass motorboat or something.  If you are going to go out and enjoy sailing at least enjoy it the way billions of people from now all the way back to like 4000years ago have, just the boat, the water, and their own hands.