在大深度潜水时,如采用水下阶段减压法,即使潜水员水底作业时间短暂,在水中的减压时间仍很长。为减少水中减压时间,避免水中停留减压造成的机体疲劳和提高装具使用率,可将潜水员在水中的大部分减压时间,移到水面甲板加压舱内呼吸纯氧来完成, In the deep dive, such as the underwater phase decompression method, even if the divers underwater working time is short, decompression in the water is still a long time. In order to reduce the decompression time in the water and avoid the body fatigue caused by the decompression in the water and improve the usage rate of the equipment, the divers can be completely respired by breathing the pure oxygen in the pressurized cabin on the surface of the deck during most decompression time of the water,