Help with fish finder

[cthewrld]

I recently purchased a used boat that has a Lowrance x55a fish finder on it. It is a black and white unit that is approximately 7 years old. I am very new to fish finders and was wondering if anyone can provide feedback or recommendations on whether it should be used in auto or manual mode. I am fishing on Lake of Bays, a large and deep lake. I am fishing for Pike, Smallmouth and Lake Trout. Any recommendations are greatly appreciated.

[Fisherman]

For the initial use, I would just use it in the auto mode. If you have the manual, read it. Then read it again. And a few more times. You'd be surprised what you miss. Then try it in the manual mode, without fishing, just doodle around with it and notice the difference. Remember what the sensitivity bar is showing in the auto and use about the same in the manual mode. If you don't have the book, you can download them from the www.lowrance.com site. And turn off the Fish ID if it has one.

[cthewrld]

Thanks for the feedback. It does have Fish ID and I do believe that it is on.