Navnet 3D DFF -1 with MFD 12 Screen

[Fishcakes101]

Hi,

I'm now getting a thick black line about 3" thick across the top of my screen when using my sonar. It seems to stay for awhile and then goes away but comes back. Is it a setting I have wrong ? Maybe has something to do with the depth ?
Thanks

 

[Johnny Electron]

It sounds like the depth offset that might have been put into the unit to account for the depth of the transducer in the water. The NN3D will show a black area for the offset.

 

[Fishcakes101]

Thank you