That only occurs when divers remain under longer than the recommended no-decompression limits. But it is done to allow the body to slowly rid itself of nitrogen that has built up in the bloodstream due to breathing pressurized air at depth. If it isn't done, the bubbles pop in a blood and cause decompression sickness, which is very dangerous.
Free divers do but scuba divers do not need to. Scuba divers take their air with them and would have no need to hyperventilate.
Like all adults or older teenagers; scuba divers need English and Maths also physics and scuba diving training. Hope I answered your question xx
The collective noun is a bubble of scuba divers.
scuba divers
Many people use a SCUBA suit for diving. Sport divers, police divers and some Navy recovery divers.
Generally no. They need to be quite fit to be able to swim in the water :)
they need to know how long they can be underwater, and how deep they can go with the air in the tank.
They swim
seebees
In the Water....
Scuba - self contained underwater breathing apparatus
Scuba Bob's Ocean Quest - 2006 Fearless Divers Scuba Rangers 2-7 was released on: USA: 2007