Smart Thru-Hull Mount Transducer with Depth & Temperature (20°, NMEA 2000) - Airmar DT800 Our plastic smart thru-hull mount transducer provides depth and temperature data to your NMEA 2000 network. This 100 W transducer has a depth of 600 ft; an operating frequency of 235 kHz; a beamwidth of 12 degrees; and a 16 to 24 degree deadrise. Transducer kit comes with installation instructions. Follow the instructions carefully to avoid damaging your boat.