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Thread: Question on SI

  1. #1
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    Default Question on SI


    If you mount the tranducer on the back of the boat; won't the outboard block the signal on that side?

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    Very little UP tilt will get the motor out of the way, no doubt when its clear.
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    There are some transom mount applications that require 2 separate SI xducer's connected with an Y cable ...

    The HB HDSI xducer needs about 7" of clearance between the transom and the motor...
    (The compact SI xducer maybe a little less)...

    The LSS 2 will need more ...as it's over 10" long ...

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    This is what it looks like if you don't trim the motor up on a Lowrance.


    This one is better but you still see it just to the left of center,

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    Quote Originally Posted by MuskyGary View Post
    If you mount the tranducer on the back of the boat; won't the outboard block the signal on that side?
    What kind of boat are you planning on mounting the transducer on?

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    as Kosmo is saying, depends on type boat and where mounted.

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    These shots were taken over a large mud flat to show how just a slight adjustment of the motor can effect SI on the motor side.




    Up to the yellow line you can see the mud flat left and right. (A)To the left or motor side you can then see the interference from adjusting the motor down a bit and once stopped I then have dead space where the motor is blocking some of the SI signal. (B) You can also see where a interference line shows up to the left. The signal is hitting the motor.





    Once the motor is angled back up the interference line goes away and the bottom returns.


    Dark areas in the SI view can be made from other things as well. A sloping bottom, shadows from large humps or the other side of a point could give this darker image. A muddy bottom with low Sen. setting could be dark but raising the Sen. will start to bring detail out.

    If you notice that this happening on the motor side try to raise the motor some and see if this helps clear up the image.
    Likes Humminbird_Greg LIKED above post

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