uses a self-contained underwater breathing equipment to
breathe underwater.Scuba divers carry their own source of
breathing gas, usually
• 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
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.
Shark and Yolanda Reef,
Egyptian Red Sea
The Yongala, Australia