Author name: Anza Emir

Learn what enriched-air nitrox is, how it affects nitrogen exposure and oxygen limits, and why gas analysis, maximum operating depth, and training are essential.

Sharks do not all behave the same way. Learn why encounters occur, how to follow local guidance, and why no article can guarantee a shark will not approach.

Most recreational scuba cylinders contain compressed air or a trained-for gas blend such as enriched-air nitrox—not pure oxygen. Gas choice and depth limits require training.

You can physically open your eyes in seawater, but salt, particles, and local water quality may cause irritation. Well-fitting goggles or a mask are usually more comfortable.

Shallow-water blackout is a sudden loss of consciousness associated with breath-hold activity and inadequate oxygen. Never hyperventilate before underwater breath-holding or practise alone.

Wetsuit boot placement depends on the suit design, boot cuff, and intended seal. Follow the manufacturer’s instructions and check that the setup is comfortable and secure.

A dive computer tracks depth and time and calculates dive information based on its settings and model. It supports planning but does not replace training or judgment.

The amount of breathing gas in a scuba cylinder depends on its internal volume and pressure. Learn why cylinder pressure alone cannot tell you how long a dive will last.