Turn your iOS device into a digital depth finder. Great Depths offers coverage of the entire US coast, the Great Lakes, Lake Champlain and more... Know exactly where you are on the water and cruise to your port of call directly and safely. Sail with Great Depths for iPhone and iPad. Great Depths offers digital depth readouts, live tide data and NOAA RNC nautical charts in 60 bargain-priced packages. Digital depth readouts are automatically adjusted based on current tide/lake level and are updated as you move or viewed anywhere with the touch of a finger. -- The handy mileage menu calculates distance between any two points instantly. -- Purchases are automatically synced across all your iOS devices and downloaded packages are stored locally on your devices so you don’t have to rely on cell service. -- Best of all, Great Depths is FREE and never has adds! You can download the app and preview the available charts packages without spending a dime.Chart coverage includes the entire coast of the contiguous USA, the Great Lakes, Lake Champlain, the Erie, Oswego and Champlain Canals, Lake Mead, Lake Oswego, Lake Pend Oreille, Lake Okeechobee, Lake Winnebago, Franklin D. Roosevelt Lake, Lake Cayuga, Lake Seneca Lakes, Wake Island and more....