I know that the AT PRO is waterproof to a depth of 10 ft. My question is, if I'm detecting in the surf, and get hit by a big wave (as sometimes happens when you're concentrating on something else, like digging a target), can the At PRO withstand the pressure that would come from the force of the wave? I've been hit by some that have been strong enough to almost knock me over. Could the AT PRO hold up against such a force, as I'm pretty certain such a wave would exert more pressure than you'd encounter at a depth of 10 ft. in relatively still water? This is a genuine question, as most of my water hunting is done at ocean beaches. Thanks in advance to any genuine replies.