I think Mike said it best about getting out with someone and seeing what you like/don’t like.
I do a lot of spot-on-spot fishing and deep water structure. I like having my largest screen up in the bow so everything is easy to see.
Down Imaging side-by-side with standard 2D is a must when picking structure apart. I know its not the best description, but I consider DI to be more like an X-ray. Standard 2D will give you the reflective echo of the signal and show you density by the intensity of the return. In a case of fish cribs, it could show limbs or part of the structure as fish, OR not show the fish because parts of the structure will “echo” much stronger and over-shadow the fish. Having the DI image to compare it with makes very short order of dissecting what is actually there.
Another example is turbulence in the water. Air or debris coming off of a wing dam can show in 2D as a cloud or mass of stuff. The DI will give a clearer image of what is there and again, easier to depict what your really looking at.
When I’m in search mode, is when I’m at the console with the big motor running. This is where I like the side scan. I run the screen rate high enough that I can cruise about 5.5-6mph. As I’m zig-zagging around, I’m looking for oddities that I want to fish. I’ll see them to the side and turn and go back over it. As I dial in the spot, hit “Mark” and drop a way point on it, or a series of way points to identify a ledge or break, or pocket.
I recently sold one of my 1197’s and now only have one locator in my boat It’s a bit of a pain, but I rotate the ram mount 180 degrees as I go from the console to the front deck. Even though I’m down to one locator, I find that the way I use my electronics haven’t changed.
The only thing I’m going to do differently this year is incorporating an additional Ram mount and fabricate an adjustable arm for my Marcum LX-9 & Camera head. I want a quick release for the camera head cable in the event it gets snagged on something.