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What is the most important difference between a scuba diver and a freediver?
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The most important difference between a scuba diver and a freediver is that a scuba diver uses a compressed air tank to breathe underwater, while a freediver breathes directly from the water. This means that a freediver must have an advanced level of swimming ability in order to be able to stay underwater for long periods of time. A scuba diver can remain underwater for much longer than a freediver due to the use of oxygen tanks.