As for false signals on beaches, some beaches have highly-mineralized sands, so you need to fiddle with your detector's settings to minimize that noise. When I feel like digging only coins & jewelry on a beach, I also screen out iron on my detector. But when I have lots of time, I let it detect the iron also -- once resulting in a lovely silver ring which was mixed in with a dozen rusty nails, and more recently resulting in an awesome gold ring with thin iron skin that was easily chipped off by me. That golden ring was in the same sandy hole with half of an iron-corroded spoon. Recheck ALL your holes for more signals, because at my iron-infested beach I dug the badly corroded junk spoon first, then when rechecking that hole, heard a small iffy signal, so dug up a fabulous surprise: 9 gm gorgeous 14k gold ring with groovy design, my first & only gold so far. A lot of California beaches have big and small iron underneath due to past manufacturing, canning, etc. Sometimes that iron leaches out and can corrode metals or in the case of my golden ring, lay a thin iron layer over the fabulous gold. HAVE FUJN AND WELCOME TO T-NET! Andi