I will try that next time I am in the area. I went in the marina the other day to play with the bird after the wind came up on the lake and ended the fishing. The paddle boat area is really cool area to scan too. Saw a few things in there that looked familiar...lol
Scan around the pipe in the paddle boat area...
This is down there...
Notice how the outside edges of the 800kHz shot is darker...
Notice how the 455kHz is brighter...but fuzzier...