With 2kW transmit power plus a low noise amplifier receiving circuit provides equal performance to previous 4kW models. The 1800 features target detection capabilities using scan correlation signal processing technology, automatic/manual settings for STC and Tune functions to enhance target visibility, optional inter switch provides second station capability (to be released later), graphical display of wind direction, wind speed, and VMG (need NMEA data), tide graph and port service guide by C-Map CF95 C-Card, and capability to edit waypoints and routes on your PC using RS232C interface option. Stores 1000 waypoints and 40 routes (100 waypoints/route). Speed and Temp, arrival, anchor, off course, and zone alarms. Includes 5.2 degree horizontal beam w/ 32RPM rotation rate for rapid updates. 1/8NM to 24NM range and includes 18''dome style scanner. Waterproof to USCG CFR 46 and Ipx5 standards. 8.1''H X 10''L X 4.5''D.