■Ascent

At the time of ascent, pay attention to the ascent rate and ascend along with the rope that was installed for descent.

In no barracuda water area, you direct light to the water surface, let divers and boats on the water surface know where you will ascend.

In night diving and poor visibility diving, it may be difficult to adjust the ascent rate visually.
In such a case, ascent carefully by applying the light of the underwater light to the bubbles of the exhaust gas to check the ascending speed, or checking the dive computer and depth gauge.