I just got back from Myrtle Beach and while I was hunting the dry or wet sand the Excal threshold worked perfectly .Different story when submerging it in the water. Walking around in the water , I have the Excal chest mounted, the Excal works perfect until I get it submerged and then the threshold goes silent. If I swing the coil over towards my scoop it sounds off okay so I'm assuming the unit still works without the threshold. When I walk back to shallower water the threshold comes back on as soon as the unit is above water. I have no other problem with it otherwise. The only thing I can think of is that the rubber seal under the threshold knob must leak water causing the threshold to stop working when submerged. Help..:..:>(
HH
HH