The unit has a waterproof display and is built to stand up to tough marine conditions. This durable casing houses an impressive memory, capable of storing up to 1,000 points of ship’s track, 999 points for marks and waypoints, and 50 routes of up to 30 waypoints each. Vital navigation data is presented on a 4.5-inch diagonal Silver Bright LCD screen with adjustable brilliance. Innovative graphic displays include Nav, Highway, Steering, Track Plotting, and two operator programmable modes, all extremely easy to use.