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Underwater Diving



• Scuba diving is a mode of underwater diving where the diver
uses a self-contained underwater breathing equipment to
breathe underwater.Scuba divers carry their own source of
breathing gas, usually
compressed air.
• 40 m -- the limit for recreational diving
30 m to more than 50 m-- Professional diving
However, there are programs that train divers for dives to 120


• Water absorbs light rapidly, that’s why scuba diving rookies
might feel disappointed that the underwater world actually
looks a little bit less colorful than in the TV documentaries.
The color that is absorbed
the quickest is red.
• Oxygen becomes toxic under high pressure. That is why
special gases with lower concentration of oxygen are provided
for dives deeper than 42m.
• In 2016 Cem Karabay, from Turkey, settled a new world record
for the longest dive, with a total of 192 hours, 42 minutes and
42 second spent underwater.



Great Blue Hole, Belize
Shark and Yolanda Reef,
Egyptian Red Sea


Blue Corner Wall,
Palau, Micronesia
The Yongala, Australia
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