This has probably been hashed out already but I couldn't find anything with the search. I've had my 998 for several years now, came with the boat. I've noticed when I run the 2d and down imaging side by side the depth they show varies significantly. In addition it seems like a rarity that I see any detailed returns near the bottom on the down imaging but often a faint haze near the bottom. Meanwhile the 2d is a hard solid line. I've attached a screen shot. I thought I had taken three or four but apparently I only managed to grab one and its not the best. I've got a helix 10 on the bow and it doesn't seem to have this issue.
Is this just the different cone of 2d and down? Or do I have issues? Thanks!