Hi all you guys and gals I was wondering how the Minelab holds up when used underwater to search the wrecks. Especially since alot of the balast piles do have hot rocks in them, I was wondering if this metal detector does well with picking up the good stuff next to these mineralized stones?? Just curious because I live in Hawaii and has tons of hot rocks and the good stuff is usually underneath them in the water. Would love to hear your comments!! Aloha