What is air off?

"Air off" is not a commonly used term and could have different meanings depending on the context. However, if it is related to scuba diving or diving in general, "air off" refers to the process of emptying the remaining air in a scuba tank or cylinder. This is usually done at the end of a dive or when a diver needs to reduce their buoyancy. The diver gradually releases air from their regulator until the tank is completely empty. It is important for divers to perform this task safely and properly to avoid any accidents or incidents.