[cowboyfisherman]

We have a Hummingbird 565 and absolutely love it........wouldn't go fishing on our boat without it.
It might be a little "pricey" for some folks ($203.00), but it tells us all the info we want to know. It is a pretty powerful unit and has a "quick disconnect", so we can take it off of the boat when we get home.
Since we don't know that much about connecting electronic stuff to a boat, we had Aurora Marine install it for us.
So, if you are looking to get a fishfinder (sonar), get a descent one and it will help you greatly.
Cody (cowboyfisherman) & Wife

 

[cowboyfisherman]

Another thing to remember (and we found out a few times last summer), a fishfinder will show you fish on the screen where you are at, but.............that sure doesn't mean those fish are biting.
Also, what about the "fish camera". You mount a screen type thing on the boat and a camera type thing is in the water. It's actually a live picture that shows you the fish under the boat. I seen this thing in a magazine was sort of stunned at how it looked. And, it wasn't cheap either.
Cody (cowboyfisherman)