Sonar transducer calibration Sonar transducers should be calibrated to ensure that accurate readings are displayed on the MFD / chartplotter. ContentsDepth transducer offsetDepth is measured from the transducer face to the bottom (e.g.: seabed). An offset value can be applied to the depth data so that the displayed depth reading represents the depth reading taken from either the keel (negative offset) or the waterline (positive offset).Setting a depth offsetYou can set the point depth readings are taken from.Setting a temperature offsetIf your sonar transducer includes a temperature sensor then you can check and calibrate your temperature reading.Ping depth limitWhen high-powered transducers are searching for a bottom lock, they can search down to a maximum of 3,048 m (10,000 ft), during the sonar’s hunt cycle. This means it can take some time to acquire or re-acquire a bottom lock. To help improve sonar bottom lock re-acquisition time on high powered transducers, a ping depth limit can be set.Parent topic: CalibrationPrevious topic: Calibration sourcesNext topic: RealVision AHRS calibrationParent topic: Fishfinder appPrevious topic: Opening the Fishfinder appNext topic: Sonar channels