Okay im not a metal detector hobyist by any means. Just an idiot who decided to go wakeboarding with an 8k watch on my wrist. The watch flew off my wrist in a nasty reverse faceplant. I have an area to search that is about 50 yards by 30 yards. The river water is about 7ft deep with zero visibility. Im looking at purchasing the tesoro sand shark detector and was wandering if there is a cheeper underwater detector that will get a one time search and rescue job done. The watch is all Stainless steel. Any help would be appreciated.