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Do you scuba

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In the PADI Open Water Diver Course it is specified that you have to be able to swim metres with any stroke and also have to be able to tread water or float for at least 10 minutes. The reason for this is not for the fact that scuba diving requires you to swim, but rather it is for yours and your groups safety. In the unlikely event that your BCD Buoyancy Control Device was to falter then there would be no device to keep you afloat except for your legs, which can tire quickly in bad water. If this was to occur in deep water then you would need to swim, tread water or float yourself to safety.
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What Is the Minimum Age for Scuba Diving?

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Do I Need to Know How To Swim to Scuba Dive? · Aussie Divers Phuket

We want to go down, but the inherent buoyancy in our wetsuits, our BCs , our lungs and our fat cells are all conspiring to keep that from happening. To overcome the force of buoyancy you have to counterbalance it with ballast weight. The question is, how much in dive weights will you need? While the answer is different for every diver, the goal is the same: carry enough weight to enable you to function efficiently and safely at all depths, and not an ounce more. Divers are generally taught to define this as being neutrally buoyant at 15 feet deep while wearing an empty BC and carrying a nearly empty tank. But how do you get there?
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Why I love ... scuba diving

In fact, this is not just for new divers, as some of these facts many don't know. Planning a dive requires a great deal of preparation combined with numerous safety checks that must be completed beforehand. This process is stressed and explained in great detail during open water certification. However, the safety process after diving is not as thorough and new divers may not know what should not be done after a dive.
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Most divers use scuba tanks filled with simple compressed air filtered and dehumidified. Recreationally, diving with Enriched Air Nitrox allows longer no-decompression limits although it restricts maximum diving depth due to oxygen toxicity by reducing the amount of nitrogen your body absorbs, thereby reducing relative risk of decompression sickness vs comparable dives using scuba tanks filled with air. Diving with Enriched Air Nitrox EANx requires special safety training, a scuba tank gas analyser and a scuba tank fill location with a compressor and gas blender capable of both producing and ascertaining the desired gas mixture. Whatever its percentages, this scuba tank gas mixture is exclusive to technical decompression diving: recreational divers do not use Trimix. Scuba tank fill locations with Trimix-capable compressors must use a certified gas blender to prepare the gas mixture.
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