A dive tank, also known as a scuba tank, is a high-pressure cylinder used to store compressed air for underwater diving. Divers use these tanks to breathe while exploring underwater environments, as they provide a supply of air that allows for extended periods of diving. The tanks are typically made of aluminum or steel and come in various sizes to accommodate different diving needs. Before diving, the tank is filled with air using a compressor, and it is equipped with a valve that controls the flow of air to the diver. Safety is crucial, so divers must regularly check their tanks for leaks and ensure they are properly maintained. Proper training and equipment, including a regulator and buoyancy control device, are essential for safe diving experiences.