I travel to new cities fairly often for my work. Several times I have rented a car with Hertz's NeverLost system (by Magellan) and have been very favorably impressed. I am considering purchasing the portable Magellan RoadMate 760 for use in my home care as well as when I travel for work (you can't always count on getting a Hertz car that has NeverLost). This unit goes for $1,099 at amazon.com.I have also been looking at the Garmin StreetPilot 2720, also $1,099 at amazon.com (not yet released). Then there is also the TomTom GO (though I'd almost NOT buy this one because it be too embarassing to say the name out loud to anyone). My question is this ... will either of these units be useful on my sailboat. I know the primary use for these devices is for driving directions in a car, but it would be wonderful if either of them could also support nautical charts. It seems a shame to spend over $1,000 for one of these only to find that it cannot be used in both environments. Anyone have any nautical experience with either of these devices? I've read the documentation on each unit as posted on the web and there is no mention of marine or nautical use. Thanks, Gary