Normal pressurized air is used for Scuba diving. However, you can get mixed gases for SCUBA diving such as Nitrox, which is mixed gases of nitrogen and oxygen. This is used by deep sea diving, but it takes special training.
Scuba divers require a few pieces of equipment in order to breathe under water. Obviously, they will need a tank containing the compressed air. These tanks can vary in size. Attached to that will be the first stage of the system which separates into a few hoses. One hose being the main breathing apparatus and another to the backup. Attached to the second stage is a regulator, which is the piece that actually goes in your mouth and used to breathe through.
Divers (and others) call the compressed air cylinders used by divers tank(s) or SCUBA tank(s).
Free divers do but scuba divers do not need to. Scuba divers take their air with them and would have no need to hyperventilate.
With a tube = Snorkling With an air tank = SCUBA With a tube and metal helment = Hard Hat Diving.
difference and similarities of air tube and food tube
difference and similarities of air tube and food tube
Because they have a air tank to help them breath.
A vertical tube of spinning air is a mesocyclone.
diver suit... I don't knew and IDC
That would be a snorkel.
Divers use 21% Oxygen and 79% nitrogen while underwater. It results in the same exact air we breath on the surface.
The blue tube.
The Circle Line is the Tube Line that did not call at the Kings Cross.