Odd lines on sonar screen...

[Big T]

Went out fishing with a friend today in NPH and any time he was within 75 feet or so, my sonar screen would show a mess of random vertical lines. I'm guessing it's obviously some sort of interference, but is there a "reason" I'm getting this? Did I get bubbles in the transducer mounting glue or something?

His didn't have the same problem and units I've had before this wouldn't do this.

Any help would be great.
Thanks!

[Billy V]

Its simply interference coming from another FF. Its common.

Sometimes you can go into the Transducer settings and choose a specific transducer model for the unit to recognize, rather than a general 200/50 transducer

[Big T]

Hey thanks for the reply. Just for shits and giggles and because I know I can just remount it later, I went ahead and pulled my transducer off and inspected the goop for bubbles and other stuff.... I think THIS may be at least SOME of my problem... doen't look good. I will just have to take it to OEX and have them do it right instead of me doing it. I used Marine goop like they said, but maybe I did something wrong..... "maybe". LOL

[Jimmyz123]

Do the installation with Electrical Putty and you won't have any of those mistakes. Works great and is not permanent.

[Big T]

Electical putty.... hmmmm.... Any particular brand? How "not permanent" is it? Easily broken off or with a bit of umpf like the marine goop?