Quote Originally Posted by callen View Post
You guessed it KY Dam Marina. why is my picture dark at the sides?
Same local marina I was talking about...you should scan down the backs of the houseboats (about 20ft from the back of the boats) and look at all the stuff in the water there...

You shots are dark out to the sides because you were probably set on 800kHz in the Side Imaging frequency...and scanning at 100ft...

Ky Dam Marina is mostly a mud bottom except along the south bank and mud really absorbs the sound pulse....

You can raise the SI Sensitivity to brighten the image some...
You can scan at the 455kHz frequency to brighten the image..(but this setting will also be more blurry than the 800)...

Rickie