Calibrating a Water-Speed Device

If you have a speed sensor or a speed-sensing transducer connected, you can calibrate that speed-sensing device to improve the accuracy of water-speed data displayed by the chartplotter.

  1. Complete an action:
    • If the sensor or transducer is connected to the chartplotter or a sonar module, select Settings > My Vessel > Calibrate Water Speed.

    • If the sensor or transducer is connected to the NMEA 2000® network, select Settings > Communications > NMEA 2000 Setup > Device List, select the transducer, and select Review > Calibrate Water Speed.

  2. Follow the on-screen instructions.

    If the boat is not moving fast enough or the speed sensor is not registering a speed, a message appears.

  3. Select OK, and safely increase the boat speed.
  4. If the message appears again, stop the boat, and ensure the speed-sensor wheel is not stuck.
  5. If the wheel turns freely, check the cable connections.
  6. If you continue to get the message, contact Garmin® product support.
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