Setting the Keel Offset

You can enter a keel offset to compensate the surface reading for the depth of a keel, making it possible to measure depth from the bottom of the keel instead of from the transducer location. Enter a positive number to offset for a keel. You can enter a negative number to compensate for a large vessel that may draw several feet of water.

  1. Complete an action, based on the location of the transducer:
    • If the transducer is installed at the water line Callout number one, measure the distance from the transducer location to the keel of the boat. Enter this value in steps 3 and 4 as a positive number.

    • If the transducer is installed at the bottom of the keel Callout number two, measure the distance from the transducer to the water line. Enter this value in steps 3 and 4 as a negative number.


    Keel offset with callouts
  2. Select Settings > My Vessel > Keel Offset.
  3. Select Plus or Minus based on the location of the transducer.
  4. Enter the distance measured in step 1.
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