Testing and adjusting the transducer

After the initial installation has been carried out, the transducer should be tested and — if required — adjusted prior to finalizing the installation.

InstallationTestingThe testing should be carried out with your vessel in the water, with a depth greater than 0.7 m (2.3 ft) but less than the maximum depth range of the transducer / sonar channel.

Note

  • It may not always be possible to obtain depth readings at higher speeds, due to air bubbles passing under the transducer.

  • It may be necessary to make several adjustments to the transducer before obtaining optimum performance.

  • If the transducer requires repositioning, ensure all old holes are filled with marine grade sealant.

  1. Open the Fishfinder / Sonar app on your MFD, and select the SONAR option from the menu.
    After a few seconds, the sea bottom should be visible onscreen, and a depth reading displayed.
  2. Start moving your vessel at a low speed, ensuring you have a depth reading and a clear image is displayed.
  3. Gradually increase the vessel speed whilst checking the sonar image. If the image becomes poor or the bottom is missing at lower speeds, then the transducer needs to be adjusted.
  4. Angle and height adjustments should be made in small increments and re-tested each time until you obtain optimum performance.
    1. Loosen the mounting bolt to adjust the transducer angle.

      Figure 1. Angle adjustment

    2. Loosen the 2 mounting bracket screws to adjust the transducer height.
  5. Re-tighten the mounting bolt and mounting screws before re-testing.