I have had my GT for a few days now and have taken it to a lake front beach in Lake Tahoe. The first day I didn't find much. The second day I found a few coins and some nails/bolts. The third day I did a search of a little area of the beach and came up with about 10 pounds of scrap metal (including an old c-clamp) and a good assortment of coins. I must have been in an area where an old dock used to be. Now to my question: How do I figure out where the coin is actually located as to the coil (near the label/on the outside on the coil/etc.). How can I hone in on the coins and not so many nails/bolts.