The word SCUBA was coined in 1952 by Major Christian Lambertsen who served in the U.S. Army Medical Corps from 1944 to 1946 as a physician. Lambertsen first called the closed-circuit rebreather apparatus he had … See more

Gas cylinders used for scuba diving come in various sizes and materials and are typically designated by material – usually aluminium or steel, and size. In the U.S. the size is designated by their nominal capacity, the volume of the gas they contain when … See more

Every scuba harness requires a system for supporting the cylinders on the harness, and a system for attaching the harness to the diver. See more

A diver uses a self-contained underwater breathing apparatus (scuba) to breathe underwater. Scuba provides the diver with the advantages of mobility and horizontal range far beyond … See more

Scuba sets are of two types:
• In open-circuit scuba the diver inhales from the equipment and all the exhaled gas is exhausted to the surrounding water. This type of … See more

The scuba set can be carried by the diver in several ways. The two most common basic mounting configurations are back-mount and side-mount, and back-mount may be expanded … See more

Buoyancy compensator
In most scuba sets, a buoyancy compensator (BC) or buoyancy control device (BCD), such … See more