A diving mask (also half mask, dive mask or scuba mask) is an item of diving equipment that allows underwater divers, including scuba divers, free-divers...

from the mask, unlike a scuba mouthpiece which is normally gripped between the teeth. Full-face diving masks are often used in professional diving. They...

masks and full-face diving masks. Breathing gases used include air, heliox, nitrox and trimix. Saturation diving is a mode of surface supplied diving...

A diving regulator or underwater diving regulator is a pressure regulator that controls the pressure of breathing gas for underwater diving. The most...

Diving equipment, or underwater diving equipment, is equipment used by underwater divers to make diving activities possible, easier, safer and/or more...

It may be either a separate unit, or integrated into a swimming or diving mask. The integrated version is only suitable for surface snorkeling, while...

An oxygen mask is a mask that provides a method to transfer breathing oxygen gas from a storage tank to the lungs. Oxygen masks may cover only the nose...

underwater diving. The definitions listed are in the context of underwater diving. There may be other meanings in other contexts. Underwater diving can be...

Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and...

Sea, four divers were in a diving chamber system on the rig's deck that was connected by a trunk (a short passage) to a diving bell. The divers were Edwin...