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The Cozumel reef system is part of the Mesoamerican Barrier Reef System, the second largest coral reef system in the world. [3] [4] Even though almost the entire island of Cozumel is surrounded by coral reefs, the park only encompasses the reefs on the south side of the island.
The Devil's Throat (Spanish: La Garganta del Diablo) [1] is an underwater cave formation near the island of Cozumel, Mexico, at Punta Sur in the Arrecifes de Cozumel National Park; it starts at approximately 80 feet (24 m) of depth and opens up at approximately 135 ft (41 m) - right at the edge of recreational dive limits.
Use of a full face mask or diving helmet to protect the airway. [6] Use of surface-supplied diving equipment with voice communications. [7] [5] Adequate swimming skills and fitness for the circumstances. [8] Use of snorkel when appropriate. [8] Lifejackets that hold the wearer's face above the water may be worn when appropriate.
Divers must avoid injuries caused by changes in pressure. The weight of the water column above the diver causes an increase in pressure in proportion to depth, in the same way that the weight of the column of atmospheric air above the surface causes a pressure of 101.3 kPa (14.7 pounds-force per square inch) at sea level.
When equipment was tested following death, few victims had an ample gas supply remaining. The surveys indicated that most problems started when the diver became aware of a low on air situation. 8% of the divers died while trying to snorkel on the surface, apparently trying to conserve air.
Cozumel is a municipality which also includes two small areas on the mainland, the ecotourism park of Xel-Ha and the Calica limestone quarry. All combined, Cozumel has a total land area of 647.33 km 2 (249.94 sq mi). [8] Cozumel has 5 main piers. Punta Langosta, the International Pier (SSA), and Puerta Maya are all piers for cruise ships.
The body can tolerate partial pressures of oxygen around 0.5 bars (50 kPa; 7.3 psi) indefinitely, and up to 1.4 bars (140 kPa; 20 psi) for many hours, but higher partial pressures rapidly increase the chance of the most dangerous effect of oxygen toxicity, a convulsion resembling an epileptic seizure. [14]
I Shouldn't Be Alive is a documentary television series made by Darlow Smithson Productions, a UK-based production company, that featured accounts of individuals or groups caught in life-threatening scenarios away from civilization in natural environments.
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