I'm looking for a new detector and have been reviewing all makes and models. I hear a lot of good things about the atp and had the opportunity to hunt with one but not sure if it was working better than my old one when it came to disc and sensitivity or if it wasn't picking up items. I know the ground at one site is full of iron but i wasn't getting signals. I played with numerous modes and settings but nothing. The few items i did find were less than 3 inches in the ground. This also concerned me because watching videos rarely do you see anyone dig more than 2-4 inches. If any of you can give me some insight into the atp in regards to depth i would appreciate it. I hunt mostly for civil war relics and many sites are heavily hunted so i want to go deeper than those before me. Thanks