Immersion in water and exposure to cold water and high pressure have physiological effects on the diver which limit the depths and duration possible in ambient pressure diving. Breath-hold endurance is a … See more

People may dive for various reasons, both personal and professional. While a newly qualified recreational diver may dive purely for the experience of diving, most divers have some additional reason for being underwater. Recreational diving is purely for enjoyment and … See more

The diving environment is limited by accessibility and risk, but includes water and occasionally other liquids. Most underwater diving is … See more

Underwater diver training is normally given by a qualified instructor who is a member of one of many diver training agencies or is registered with a government agency. Basic diver training entails the learning of skills required for the safe conduct of activities in an … See more

There are several modes of diving distinguished largely by the breathing gas supply system used, and whether the diver is exposed to the … See more

Freediving as a widespread means of hunting and gathering, both for food and other valuable resources such as pearls and coral, dates from before 4500 BCE. By See more

Due to the inherent risks of the environment and the necessity to operate the equipment correctly, both under normal conditions and during incidents where failure to respond appropriately and quickly can have fatal consequences, standard procedures See more