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. Although the use of compressed air is common, an new mixture called enriched air (Nitrox) has been gaining popularity due to its benefit of reduced nitrogen intake during repetitive dives. 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 rang extension, decompression gas or emergency breathing gas. Closed-circuit or semi-closed circuit re-breather 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. Re-breathers extend the time spent underwater compared to open circuit for the same gas consumption; they produce fewer bubbles and less nose 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.
Scuba Diving may be done recreationally or professionally in a number of applications, including scientific, military and public safety roles, but most commercial diving uses surface-supplied diving equipment when this is practicable. Scuba divers engaged in armed forces covert operations may be referred to as frogmen, combat divers or attack swimmers.
A Scuba Diver primarily moves underwater by using fins attached to the feet, but external propulsion can be provided by a diver propulsion vehicle, or a sled pulled from the surface. Other equipment includes a mask to improve underwater vision, exposure protection, equipment to control buoyancy, and equipment related to the specific circumstances and purpose of the dive. Some Scuba Divers use a snorkel when swimming on the surface. Scuba divers are trained in the procedures and skills appropriate to their level of certification by instructors affiliated to the diver certification organisations which issue these certifications. These include standard operating procedures for using the equipment and dealing with the general hazards of the underwater environment, and emergency procedures for self-help and assistance of a similarly equipped diver experiencing problems. A minimum level of fitness and health is required by most training organisations, but a higher level of fitness may be appropriate for some applications.
WHY SCUBA DIVING BECOME POPULAR SPORT?
Scuba Diving is mainly done for the attraction of the unattainable undersea world. It is one area of nature that mankind has not been able to fully control, we simply are not able to breathe underwater. Hence, Scuba Diving gives us an opportunity to be in that underwater world, even if it is just for a limited amount of time.
Of course, the underwater world is beautiful as well, with many people opting for scuba diving in Asia or Scuba Diving in the Red Sea or The Great Barrier Reef, said to be some of the World's best scuba diving locations. The different colors and marine wildlife are so impressive in all these locations that people find themselves returning over and over again.
Besides that, did you know ...?
For recreational divers, the depth limit is between 30 and 40 meters (equating to 100 to 133 feet). If you want to go deeper, special training or a specially trained buddy is required.
Nuno Gomes holds the world record for deepest scuba dive at 318 meters (or 1044 feet). He defeated John Bennet (deceased), who dove to 308 meters (or 1016 feet). There is a French diver, Pascal Bernabe, who maintains that he has been able to dive deeper (330 meters or 1083 feet), but this is unconfirmed.
If you do enjoy Scuba Diving, there are a couple of things you can do to make it even more interesting. There are many artificial reefs, for example. These artificial reeds have been created either to restore destroyed coral or as a scientific experiment to see how coral grows and how it attracts other marine life. There are many wrecks, for example, that have been purposely sunken to create artificial reefs.
If you have nerves of steel, you may want to consider going for a dive with sharks! A cage dive with sharks can be the experience of a lifetime. You are basically enclosed in a steel cage and lowered into a shoal of shark, attracted by fish guts beforehand.
The main thing with Scuba Diving will always be : STAY SAFE and ENJOY IT !!!
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@ Jackie San