The new Raymarine A57D chartplotter and fishfinder combination unit features a bright 5.7 inch color screen. The unit has a WASS GPS receiver built in to give it super accurate fixes on your vessels location. It comes preloaded with US coastal charts from Navionics. The A57D uses Raymarine's HD Digital fishfinder technology to give the unit superior fish finding ability. It features 500 watts of RMS power and transmits in either 50 or 200 MHz. Features include: High resolution 5.7" VGA (640 x 480), IPX6 waterproof construction, Tilt & swivel bracket with quick release and cable management, High speed chart redraw, 1200 Waypoints and 150 routes with unlimited waypoint and route storage using optional CompactFlash memory card, High sensitivity internal WAAS GPS sensor, Navionics Gold and Platinum capability, 3D and satellite photo charts (with optional Platinum Chart Card), AIS target tracking (with optional AIS250 module), Superior fishfinder performance using the Built-in Digital Sounder Module, Raymarine's patented HD Digital fishfinder technology, Hands-free HD Digital technology automatically adjust more than 220 sonar parameters per second and virtually eliminates clutter, HD Digital adaptive receiver technology precisely targets fish and bottom structure with amazing clarity, and Transom mount transducer with depth-speed-temperature included. Additional transom, in-hull, trolling motor and thru-hull transducer options available.