Speed calibration
Calibrate your speed transducer as follows:.
For best results, ensure that there is minimal or no tide/current effect when calibrating speed through water.

Speed Set STW to SOGSet STW to SOG — Select to apply a scaling factor to all STW readings, based on the present difference between STW and SOG.
Speed Adjust STWAdjust STW — Apply a scaling factor to all speed through water values.