Navman makes a variety of GPS navigation devices for the car, boat or off the trail–or all three. Sometimes, for a handful of reasons, your Navman’s base maps may become faulty or dated, or may freeze up completely. Other times, you may wish to unlock complementary maps on your Navman to travel outside the country where the device was purchased or to fine-tune your regional maps. This latter option will cost you upwards of $29.99, as of November 2010.
