The word SCUBA is historically an acronym, self- contained underwater breathing apparatus. The equipment was originally used by soldiers for underwater warfare. Military frogmen apply this technique in following up enemy lines, directly confronting their enemies or setting up bombs. The police department also uses this method in crime investigations involving water and in performing a search.
The field of professional diving is one that has continued to generate great interest from many different areas. Persons that want to be professional divers are among those that need to have highly specialised scuba diving equipment. This is because of the dangers that are posed by the deep waters. Professional divers offer training to other people who have an interest in this sport. Apart from this, they also play an important role in field such as marine biology, underwater archaeology, geology, oceanography and photography.
The apparatus used in this exercise allow the diver to breath while under water. The air needed for breathing requires enough pressure to balance with the surrounding pressure which is a sum of the normal atmospheric pressure and the increasing hydrostatic pressure as the diver descends. There has to be a balance between the internal and external pressures. For this reason valve regulators ensure smooth inspiration and expiration regardless of depth.
One of the most preferred types of design is one that has two compartments. One of the compartments has a connection to the gas cylinder that is under very high pressure. The second is connected to the mouth piece and delivered the air to the mouth. Once the diver enters the water, a regulator in the first compartment lowers the pressure by about 30 times (from about 300 bars to 10 bars) above the pressure in the immediate environment. Once the pressure has been regulated, the air is released to the second compartment.
The other type of equipment found in the markets is what is known as the rebreather. This is less commonly used. Two types of rebreathers exist. These are the closed circuit, CCR and the semi-closed (SCR). The main difference that exists between rebreathers and open circuits is that in the former exhaled air is not released as waste into the environment. Rather, it is processed to recover some oxygen. They main downside is that they have a higher failure rate.
For buoyancy control, divers need diving suits, weighting systems and buoyancy compensators. A constant depth in water has to be maintained by controlling the speed of descent and ascent. This reduced the physical effort of swimming and economise on gas consumption.
There are a number of hazards relating to scuba diving Atlanta residents may want to know. The most frequently encountered include oxygen toxicity, barotrauma, hypothermia, nitrogen narcosis and incompetence. Dry suits are greatly helpful in helping avoid hypothermia. The suits also help prevent damage to the skin by underwater organisms. It is important to ensure that all the safety precautions are taken to avoid accidents.
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