P39 235kHz, Transom, Smart Triducer Multisensor, 2m Cable, DST 60/100 W The P39 is our mid-size, transom-mount, TRIDUCER Multisensor, combining depth, speed, and temperature functions in a single housing. Its hydrodynamic shape features a rounded nose which reduces the turbulence under the transducer s acoustic face for accurate high-speed depth readings. Airmar's Smart Sensors have embedded microelectronics the transducer element and signal processor are only millimeters apart. The signal from the depth transducer is processed right inside the sensor itself. All that is needed to receive depth, speed, and temperature data is a single cable into a compatible network or display. Available as an analog sensor or a digital Smart Sensor that can output in NMEA 0183 or NMEA 2000 protocol.