One point Speed Calibration

Quick calibration procedure for speed transducers.

CalibrationSpeedSpeed calibrationone pointPrerequisites:

  • For best results SOG data should be available, or an alternative method of estimating vessel speed must be used — e.g. vessel speed can be estimated using nautical measured mile markers or similar landmarks of a known distance apart. For more information, refer to: Nautical Measured Mile Markers

  • You will need to be underway, with sufficient space to maneuver unhindered.

  • In order to achieve accurate results, water conditions must be calm with zero tide and zero current.

  1. Press the Menu button.
  2. Select Set-up.
  3. Select Transducers Set-up.
  4. Select Continue.

    The display will search for and show a list of connected devices (i.e. iTC-5, DST, or transducer pod).

  5. Select the device that is connected to the transducer you are calibrating.

    A list of available transducer data is displayed.

  6. (1)Select Speed.

    (This step is only applicable when calibrating a speed transducer connected via an iTC-5.)

  7. Select Speed Calibration.
  8. Select Adjust speed up / down.

    The one point Speed Calibration page is displayed.

    Description

    1

    SOG speed reading

    2

    Current speed reading

    CalibrationSpeedSpeed calibrationone pointIf SOG data is not available, the SOG value is displayed as dashes.

  9. Accelerate your vessel to a steady, typical cruising speed.
  10. Use the Up and Down buttons to adjust the current speed reading so that it matches the SOG reading or matches your estimated speed.
  11. Select Done when both values are the same.

    The calibration complete page is displayed.

  12. Select OK.

CalibrationSpeedSpeed calibrationSpeed Run calibration

If you experience significant deviation between SOG and log speed readings at different vessel speeds, a Speed Run Calibration should be performed. For more information, refer to the following section: Performing a Speed Run Calibration using SOG