Garmin Plastic In-hull Mount Adjustable Smart Sensor w/ Depth - Airmar P79. This Garmin Smart In-hull Mount Adjustable Transducer features a depth of 500 ft an operating frequency of 235 kHz a beamwidth of 6 degrees and a 0 to 22 degree deadrise. Features of Garmin Smart In-hull Mount Adjustable Transducer with Depth Airmar: Airmar Smartsensor Depth only N2K MFG# 010-11394-00 235KHz 100 Watt depth sounder module P79 plastic adjustable in-hull mount housing NMEA 2000 data output w/ 20' cable. Package Contents: Garmin Smart In-hull Mount Adjustable Transducer with Depth Airmar Airmar Smartsensor Documentation Garmin 010-11394-00: Plastic In-hull Mount Adjustable Smart Sensor w/ Depth - Airmar P79