The "height" measurement is the distance from the sensor and down to the seabed. The distance is measured using a small echo sounder built into the sensor.
The PI Height sensor is a general purpose single measurement sensor. Position this sensor wherever on your gear you wish to monitor the height. The sensor is mainly designed for pelagic and bottom trawl. For seine gear, use the PI SeineSounder.
The PI SeineSounder is a dual measurement sensor. It provides information about gear depth and distance from gear to bottom. It is designed for maximum utilization on both trawl and purse seine gear.
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