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Losing sonar readout when underway #13384545 12/27/19 11:35 PM
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kirbydog Online Content OP
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When I get underway I lose sonar contact with the bottom once I'm up on plane and underway.

Tried tweaking the transducer at the back of the boat but can't get it to give me sonar returns when underway-anything I can do
about it?

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Re: Losing sonar readout when underway [Re: kirbydog] #13384553 12/27/19 11:41 PM
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Originally Posted by kirbydog
When I get underway I lose sonar contact with the bottom once I'm up on plane and underway.

Tried tweaking the transducer at the back of the boat but can't get it to give me sonar returns when underway-anything I can do
about it?


Post a picture of your transducer installation.


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Re: Losing sonar readout when underway [Re: kirbydog] #13384557 12/27/19 11:51 PM
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Don't know how to post pictures-I'm 70. smile

Re: Losing sonar readout when underway [Re: kirbydog] #13384571 12/28/19 12:12 AM
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What brand of electronics are you using?

Re: Losing sonar readout when underway [Re: kirbydog] #13384631 12/28/19 01:16 AM
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Lowrance.

Re: Losing sonar readout when underway [Re: kirbydog] #13384633 12/28/19 01:18 AM
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Is it a side/down scan transducer mounted outside the transom?


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Re: Losing sonar readout when underway [Re: kirbydog] #13384635 12/28/19 01:20 AM
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Probably nothing you can do except add a shoot thru hull transducer, and hope for the best.. On a standard bass boat installation, the transom-mounted transducer is either above or just skimming the surface when on plane. Even many "thru-hull" mounts are just off the pad. I only keep bottom until I hit about 45-55 mph and am at 3/4-full trim and i have both transom and thru-hull mounts. Now, i do have Raymarine units that have an imperfect network identity..... frown


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Re: Losing sonar readout when underway [Re: kirbydog] #13384780 12/28/19 03:10 AM
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I know I heard Aaron Martens using side imaging at 25 mph, never understood how to get it setup to work at speed...

Re: Losing sonar readout when underway [Re: kirbydog] #13384799 12/28/19 03:18 AM
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Set it on the transom sticking down about an 1/8 of an inch below the pad. Mine reads at high speeds very good.



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Re: Losing sonar readout when underway [Re: Chris B] #13384876 12/28/19 11:12 AM
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Originally Posted by Chris B
Set it on the transom sticking down about an 1/8 of an inch below the pad. Mine reads at high speeds very good.


Nice, I wondered if that would work but I never did that thinking that it would cause too much turbulence in the water below the pad and not get a reading.

Re: Losing sonar readout when underway [Re: kirbydog] #13384877 12/28/19 11:19 AM
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It means it's time to trim up and haul azz.

Re: Losing sonar readout when underway [Re: kirbydog] #13384965 12/28/19 02:30 PM
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I can only get a depth reading at an idle. When I get on plane my graph shows nothing.

Re: Losing sonar readout when underway [Re: kirbydog] #13384973 12/28/19 02:36 PM
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di/si ducers will not read above about 6-7 mph. get a thru hull and put it as far back in the bilge as possible.


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Re: Losing sonar readout when underway [Re: NickHasty] #13385127 12/28/19 05:52 PM
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Originally Posted by NickHasty
I know I heard Aaron Martens using side imaging at 25 mph, never understood how to get it setup to work at speed...


I would have to see that for real. I would never take anyone's word for that.

Re: Losing sonar readout when underway [Re: ezbassin] #13385244 12/28/19 08:36 PM
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Originally Posted by ezbassin
Originally Posted by Chris B
Set it on the transom sticking down about an 1/8 of an inch below the pad. Mine reads at high speeds very good.


Nice, I wondered if that would work but I never did that thinking that it would cause too much turbulence in the water below the pad and not get a reading.


[Linked Image]


EJ, mine works well at speeds up to about 35 mph. This is not my boat. If you mount it too close to the center of the pad like this one it will get too much air bubble interference and cause bad readings/loss of bottom signal.

My transducer is mounted off to the starboard side about a foot from this. At low speeds under 35 or so there is more of the pad in the water so you can mount the transducer off to the side a bit. That keeps it in cleaner water for a better reading.

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