Confirm the necessary equipment ready and master the handling.

■Regulator

In deep diving, as the depth increases, the density of the breathing air increases and the respiration resistance increases, and making it difficult to breathe comfortably.

Also, when two people breathe using the octopus, the respiratory resistance is even greater.

Choose a balanced piston type first stage regulator with low respiratory resistance.

■Backup scuba

In deep diving, don't forget to carry a backup scuba to safely return to the surface in the event of an emergency.
it is necessary to carry the safety second.
Diving with a pony bottle is safer.