It was commonly used for underwater civil engineering, commercial diving and naval diving.

Neox (also called neonox) is a mixture of oxygen and neon sometimes employed in deep commercial diving.

Neon (Ne) is an inert gas sometimes used in deep commercial diving but is very expensive.

It claims no expertise in areas involving commercial or military diving.

Now, diver deployment systems are accepted as normal offshore practise, and go a long way to making commercial diving safer.

Higher risk work, particularly commercial diving, may be restricted to surface supplied equipment by legislation and codes of practice.

Owing to the expense of helium, heliox is most likely to be used in deep commercial diving.

Trimix is often used in commercial diving and in technical diving.

Salvage operations were in their infancy, and commercial diving was almost unheard of.

There are several branches of professional diving, the most well known of which is probably commercial diving.