As Marie13 says and even better with just a piece of rope and double enders you can remove when not necessary.
If you are small or tall enough, on a rocking boat, having to walk to the exit, you just attach.the top of the tanks to the dring waist, put the 1m reg in your mouth, and jump and do the setup in the water
If you are small or tall enough, on a rocking boat, having to walk to the exit, you just attach.the top of the tanks to the dring waist, put the 1m reg in your mouth, and jump and do the setup in the water