Choosing a GPS help.

[spareparts]

A freind of mine has an older pacemaker that has an enclosed cabin, it cruises at about 9 knots, he has a program for his laptop that uses an external gps antenna that plugs into his laptop that runs the equivalent of the navionics platinum with all teh detail and google earth images, he only paid about $350 for the whole set up(not counting the laptop), if you have a slow boat with an enclosed cabin thats not going to get bounced around a lot, this is the way to go