If you want to go wreck hunting, better off starting with big targets on flat sandy bottoms. Lyme Bay is a good place to start. Try the Salsette, M2, Buccaneer, Baygitano for size, you'll get a feel for what you're looking for & what wreckage looks like on the sounder. You need patience & determination. Most of the big wrecks are accurately charted. Wrecks tend to lay across the tide I.e. At 90deg to the tidal flow, you stand a better chance of locating the wreck if you track with & against the tide.
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5