SPECIALITY COURSE

■BC

Boat diving may require you to descend faster than usual, so you need a BC with a power exhaust or a BC of that you can exhaust air when you pull the inflator hose.

■Horn

In order to signal boats and divers with sound, BC should be equipped not only with a whistle but also with a horn that can be used underwater.

■Signal float

Divers are difficult to find from boats when the distance between the diver and the boat is large or when the waves are large.
Signal your boat using signal flow.

■Water surface float

Boats can find the diver's position underwater by finding the diver's exhausted foam, but the foam can be difficult to see due to the waves.

A water float, prepared by the team leader, is used to signal the position of the diver underwater to the boat.

If the tide on the water surface is very fast, the team leader may not be able to use the water surface float because he with the water surface float is washed away faster than other divers.