CAVEDIVING
Cave diving
Cave diving is underwater diving in caves which are at least partially filled with water. The equipment used varies depending on the circumstances, and ranges from breath hold to surface supplied, but almost all cave diving is done using scuba equipment, often in specialised configurations. Cave diving is generally considered to be a type of technical diving due to the lack of a free surface during large parts of the dive, and often involves decompression.The above text is a snippet from Wikipedia: Cave diving
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