A lot of cheaper LCD units feature "fish" icons instead of actual displays of how the unit "sees" objects that are not in contact with the bottom. Personally, I hate the fish pictures and wouldn't own such a unit. I'd rather see a little blip that needs to be interpreted by me and might remain a mystery than see a big, gawdy cartoons plastered on the screen in its place. You are correct that the main purpose of the thing is to keep track of bottom topography, but to me, it's the principle of the thing, so no cartoons for me.
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