With its quad helix antenna and high-sensitivity, GPS and GLONASS, receiver, GPSMAP 64ST locates your position quickly and precisely and maintains its location even in heavy cover and deep canyons. The advantage is clear - whether you’re in deep woods or just near tall buildings and trees, you can count on GPSMAP 64 to help you find your way when you need it the most. Water resistant: IPX7. Wt: 9.2 oz.