Scuba diving is a mode of underwater diving where the diver uses a self-contained underwater breathing apparatus (scuba) which is completely independent of surface supply, to breathe underwater.Scuba divers carry their own source of breathing gas, usually compressed air, allowing them greater independence and freedom of movement than surface-supplied divers, and longer underwater endurance than breath-hold divers. Open circuit scuba systems discharge the breathing gas into the environment as it is exhaled, and consist of one or more diving cylinders containing breathing gas at high pressure which is supplied to the diver through a regulator.

They may include additional cylinders for range extension, decompression gas or emergency breathing gas. Closed-circuit or semi-closed circuit rebreather scuba systems allow recycling of exhaled gases. The volume of gas used is reduced compared to that of open circuit, so a smaller cylinder or cylinders may be used for an equivalent dive duration. Rebreathers extend the time spent underwater compared to open circuit for the same gas consumption; they produce fewer bubbles and less noise than open circuit scuba which makes them attractive to covert military divers to avoid detection, scientific divers to avoid disturbing marine animals, and media divers to avoid bubble interference.

architecture boats buildings 417344 1

The Tiananmen, a gate in the wall of the Imperial …

pexels photo 732895 1

The Tiananmen, a gate in the wall of the Imperial …

nature forest wilderness mountain dock lake 306 pxhere.com 1

The Tiananmen, a gate in the wall of the Imperial …

Magnificent Paris

The Tiananmen, a gate in the wall of the Imperial …

pexels photo 457011 1

The United Kingdom encompasses England, Scotland, Wales, as well as …

nature walking hiking travel europe spring 362370 pxhere.com 1

The Tiananmen, a gate in the wall of the Imperial …

pexels photo 672706

The Tiananmen, a gate in the wall of the Imperial …

mountain sky mountain range flying fly freedom 67385 pxhere.com 1

The Tiananmen, a gate in the wall of the Imperial …

Load More Trips
error: