The idea is that when the bluetooth goes out of range the beacon goes off. It seemed like a nice way to be able to sleep a little better when off watch. I usually worry a little about my wife on watch and she worries about me. So knowing that I will get an alarm
if she goes overboard would be nice. Of course we should not fall overboard in the first place but it is for peace of mind as well.
I also have a waterproof handheld VHF
. This can talk to the boat's VHF and buddy up so I have a way of finding someone as long as they have the VHF in clipped to them. So the on watch person has to have VHF with a flare or two as well to help with being found again.
I will probably buy a few to keep on the boat
anyway. They are pretty cheap