As I am still in the learning stage with this machine, was wondering if a silver dime locks on the dime icon the same when found in the ground as it does in air testing, or if it is different, also, I know from air testing that a nickel does not produce the coin sound, was wondering if when hunting there was any thing different to help identify when a nickel is located, as I have dug when it said it was a nickel, only to find something else, any help would be appreciated, as I have yet to find either of these coins.