I have had my 998 going on 2 years now and still am having trouble. I recently updated it and went out today and TRIED to figure it out. I am just about to give up. For example I know where some brush piles are in about 18 foot of water so i figured I would go to them graph them and try to see if the new update helped. So went to one brush pile went right over top of it and i could see it on the si in the black water column like i thought its suppose to. I then went 10 to 15 feet off of it and tried to see if i could see it. with many passes and many adjustments I just cant see it. I started on factory setting except for the width, it was at 50. But with many passes I changed the setting on everything. width, sensitivity, contrast, etc. Still I can not see it. This happens alot. What can I do or am i Asking to much? I just cant get the quality I thought I could get.