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.
Divers typically get their air from a tank filled with compressed air, which they carry on their backs. This tank is connected to a regulator that controls the flow of air, allowing divers to breathe comfortably underwater. In some cases, divers may use alternative gas mixtures, such as nitrox or trimix, to extend their dive time or enhance safety. Surface-supplied diving systems are another option, providing air through a hose from a support vessel.
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.
That would be a snorkel.
diver suit... I don't knew and IDC
Divers use 21% Oxygen and 79% nitrogen while underwater. It results in the same exact air we breath on the surface.
The blue tube.