Are scuba tanks 100% oxygen?
In reality, recreational divers typically use air (approximately 21% oxygen and 79% nitrogen) or Enriched Air Nitrox (ranging from 22% to 40% oxygen with the remainder filled in with nitrogen). You can learn more about Nitrox diving here. In summary, scuba divers never use pure oxygen. The most commonly used mixture is nitrox, also referred to as Enriched Air Nitrox (EAN), which is air with extra oxygen, often with 32% or 36% oxygen, and thus less nitrogen, reducing the risk of decompression sickness or allowing longer exposure to the same pressure for equal risk.Many non-divers assume scuba tanks are filled with 100% oxygen. In reality, recreational divers typically use air (approximately 21% oxygen and 79% nitrogen) or Enriched Air Nitrox (ranging from 22% to 40% oxygen with the remainder filled in with nitrogen).
What is a class 3 diver?
III diver means a diver trained in all aspects of air diving using scuba and surface air supply diving equipment to a depth not exceeding 30 metres without the use of a surface compression chamber; View Source. We can come up with up to 18 different types of diving depending mostly on depth, purpose, and environment. Some common ones include recreational diving, technical diving, commercial diving, military diving, and scientific diving.Technical diving is a more complex, and challenging, form of scuba diving. Technical divers rely on specialized training, equipment, and mixed gases to safely descend beyond the recreational limit to depths that can exceed 90 meters (300 feet).