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The first two steps in getting certified in scuba diving is to make sure that you are a reasonably proficient swimmer and you get medical clearance from your doctor to take up the sport. As for the swimming, you don't have to master every type of stroke. Scuba certification only requires that you are able to swim about 200 yards
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Nitrogen narcosis is a dangerous condition that can affect scuba
divers, especially when diving deeper than 30 meters. The exact
mechanisms behind nitrogen narcosis are still to be explored,
but it has to do with nitrogen gas affecting the nerve
transmissions in the body during high pressure. Nitrogen is not
the only gas capable of affecting the nerve transmissions when
the body experience high pressure; the
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Today, scuba diving computers do everything from calculating, and audibly prompting decompression stops to monitoring oxygen consumption in real-time. This really takes the stress out of scuba diving.
A computer calculates your no decompression time based on the total time you spend at particular depths, whereas a dive table can only calculate your no deco time based on maximum depth. Therefore,
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