Help reading Lowrance Mark 4 GPS

[packeryakker]

Originally Posted by salty pirate

fish id is no good.
i leave noise off on my ff. sometimes it helps to go back to the factory defaults then adjust from there.

I have the same FF and sometimes get some odd lines as well. I usually turn it off and back on and it clears up...or.. go in to your sonar menu and choose a preset value shallow water for instance and then switch back to your regular settings and it may help.