Do you know what kind of gas you carry with you when you dive?
Many people talk about the cylinders that divers carry, it is considered to be an oxygen cylinder.We habitually called the cylinders that divers carry on their bodies as oxygen cylinders But in fact, when divers do shallow dives, they carry a cylinder of compressed air, which is oxygen + nitrogen + helium.
Diving can be generally divided into closed air diving and scuba diving, snorkeling and free diving are closed air diving. Among them, snorkeling is the simplest, people only need to wear a mask, breathing tube and flippers to dive into the depth of 3 to 5 meters for a short water sightseeing. Scuba diving generally refers to the use of a self-contained underwater breathing device equipped with a specific gas cylinder.
Air in nature is composed of various gases, of which 20.95% by volume is oxygen, 78.09% by volume is nitrogen, and the remaining 0.96% by volume is carbon dioxide and argon. When scuba diving, the cylinder on the diver's body is compressed with natural air, containing 21% oxygen, 79% nitrogen, and a small amount of helium.
