Definition of air pocket

The term "air pocket" is used to describe a sudden drop in air pressure in an enclosed space, particularly underwater or in a confined area. This dropping of air pressure can create a small pocket or bubble of compressed air that is isolated from the surrounding environment. These air pockets can pose a danger to divers as they may cause sudden ascents or be mistaken for deeper dives, leading to disorientation, narcosis, or even decompression sickness. In aviation, an air pocket is another term for a region of significantly lower atmospheric pressure, which can cause temporary turbulence and discomfort for passengers and crew. These air pockets are typically found in mountainous or hilly terrain and can affect altitude measurements, requiring altimeters to be adjusted accordingly to prevent over- or under-estimation of altitude. In summary, the origin of the term "air pocket" relates to the sudden appearance of pockets or bubbles of compressed air in spaces where air pressure rapidly drops, presenting risks and challenges in various industries and situations.