Back in 1984, Navionics pioneered electronic charting. The company now possesses the world's largest database of marine and lake charts. Previously, those charts were primarily found on data cards which were loaded up on chart plotters, but today all one has to do is subscribe to the Navionics boating app. Some features include sonar charts, nautical charts, and even there is even local info provided by fellow boaters.
App users benefit from daily chart updates, ensuring you have the most accurate info about your boating environment, as well as advanced options that let you highlight shallow areas, select depth shading and filter depth contours, adjust water level or target key fishing areas.
Navigation features include route planning with ETA, distance to arrival, heading to waypoint, fuel consumption, and for iPhone and iPad (coming soon to Android), dock-to-dock auto routing based on chart data and navigational aids.