I'll be honest .. I didn't do a search for this topic but I'm not so sure I've ever seen it .. Considering how important an item this is for the majority of catfisherman out there I'm surprised to see how little they are discussed. I thought I'd start this thread to help out those with little knowledge of how to actually use a depth finder and like myself who knows nothing about what the terms mean. I'm thinking of getting myself a better depth finder but when I went to look for one I realized I had no clue what anything meant. Things I don't understand: 200kHz skimmer .. is this the standard? Most seem to have this. Is a higher number better? Most websites say that 50kHz is better for deep water. How deep tho? 50ft? 100ft? 1000ft? 5" diagonal .. Not really sure what this means but I would tend to assume that the bigger that number the better. Does this have an affect on the cone angle? Peak to peak power .. there's some out there with 1000 and some out there with 4000. Seeing as the ones that have 4000 I would assume that is better but again I have no idea why. Anyone have any secrets on how to obtain the right combination of sensitivity and greyscale? I want to be able to use my depth finder as more of a fish finder. It does OK for finding out how deep I am or seeing structure on the bottom. I would certainly like to purchase one that will identify structure better. A jumbled mass of grey really means nothing to me. Is it a tree on the bottom or a rock? Is it big or small? I guess I need alot of answers before I run out and buy a new one. A new one needs to be able to seperate structure from the bottom and if it is on the bottom it needs to be defined better. I also want to be able to see fish. A mark on the bottom could be a catfish or it could be a rock. I have no idea how to tell. A mass in the middle of the water column could be shad or a cloud of dirty water. Once again I have no idea how to tell the difference. I'm hoping some of you out there can shed a little insight and maybe give me a recommendation for a good depth finder. I'm not interested in some $1000 unit, but a good $500 or under model that will give me a better reading and more confidence to drop the anchor. I'm sure there's lots of you out there with the same questions as me, and I know on a board with so many intelligent members, someone is going to have an answer for us. Thanks guys!