Mitchell is an author and avid technical diver.

As a defense against these threats, technical divers use a special gas called nitrox, a blend containing more oxygen than normal air does.

Gary Gentile (b. 1946) is an American author and pioneering technical diver.

"There's diving for every diver, from the beginner to the boldest of the technical divers."

Assistance was also provided by Korean technical divers and a lone German diver.

Keeping this in mind, it is not hard to see why technical divers who do long deep dives require multiple cylinders or rebreathers.

David Apperley is an Australian technical diver and cave explorer.

Because of the easily-reached deep areas, technical divers also use Cove 2 for training.

Recreational and technical divers alike find Sund Rock attractive for various reasons.

Lying at 37 meters underwater, this wreck is an excellent base for recreational and technical divers.