Garmin GPSMAP® 78 comes with built-in worldwide basemap, so you can navigate anywhere with ease. And, like the rest of the 78-series, the 78 is water resistant (IPX7) and even floats in water. With its high-sensitivity, WAAS-enabled GPS receiver and HotFix™ satellite prediction, GPSMAP 78 locates your position quickly and precisely and maintains its GPS location even in heavy cover and deep canyons. Adding more maps is easy with our wide array of detailed marine, topographic and road maps, available on microSD card.