Your hand will stir up the sand some, but it usually only takes a few seconds to clear itself back up again.
If you want you can get a handheld water scoop, but I'd suggest plastic so that you aren't always tripping your metal detector.
Of course using a scoop will cause almost as much visibility disturbance as your hand will when it comes time to dump the dirt out, but again it's usually just a short lived mess.
You can always get a pinpointer to help locate your targets. The Garrett carrot is only good up to 10' underwater though, so I'd consider the XP MI-6 as I believe that's good up to 30'.
If you want you can get a handheld water scoop, but I'd suggest plastic so that you aren't always tripping your metal detector.
Of course using a scoop will cause almost as much visibility disturbance as your hand will when it comes time to dump the dirt out, but again it's usually just a short lived mess.
You can always get a pinpointer to help locate your targets. The Garrett carrot is only good up to 10' underwater though, so I'd consider the XP MI-6 as I believe that's good up to 30'.