■Entry

Turn on all underwater lights and strobe lights to make sure there are no abnormalities.

At the entry point use the underwater light to check there are no driftwood and other obstacles, and check the wave size and cycle.

Once you have entered, gather around your team leader.

A head of Barracuda which has the property of rushing into the light is as sharp as a knife.
When using an underwater light in a water area with Barracuda, do not point the underwater light in parallel on the water surface.