Raymarine A50D 5-Inch Waterproof Marine GPS and Chartplotter 5-inch LCD display All the features of the A50 plus a 500 Watt HD Digital Fishfinder built in. Includes charts of US inland lakes and rivers by Navionics. Built-in 12 Channel GPS Receiver with WAAS Sunlight Viewable High Resolution VGA (640x480) display Fully waterproof enclosure Tilt swivel mount features cable management and quick release for easy removal from the boat All the features of the A50 plus a 500 Watt HD Digital Fishfinder built in. Includes charts of US inland lakes and rivers by Navionics. Built-in 12 Channel GPS Receiver with WAAS Sunlight Viewable High Resolution VGA (640x480) display Fully waterproof enclosure Tilt swivel mount features cable management and quick release for easy removal from the boat