Underwater Diving

1.

2.

• 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
metres

3.

• 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.

4.

5.

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

6.

Blue Corner Wall,
Palau, Micronesia
The Yongala, Australia