For Xmas, I bought my wife a Magellan CrossoverGPS for her car. It's pretty good for street navigation and was on sale for a great price. It's "crossover" in the sense that it can be used for outdoor and marine navigation being waterproof and somewhat ruggedized. The marine capability comes from accepting extra cost SD cards with "easy to use BlueNav™ marine charts based on highly respected Navionics Gold charts". Does anyone know what's up with these charts and whether this contraption would work for, say, Southern New England coastal navigation?