Still works no problems, just need to realize you might be viewing wave caused interference or image irregularities. Your brain can generally sort out the irregularities without issue.
I have had it in at least 1-2’s on Michigan, no big issues. I would think 3-4’s would be ok too, but it just might depend on conditions, depth, etc??
The 2d in my images is of the lake Michigan bottom, which should have been generally flat, so you can tell there is some wave action. The SI shows a slight wavy appearance, but nothing serious.
If you look closely, you can see fish marks in each image. The third one has some huge salmon sitting on the bottom on the right side.
Mike