<P> The decompression of a diver is the reduction in ambient pressure experienced during ascent from depth . It is also the process of elimination of dissolved inert gases from the diver 's body , which occurs during the ascent , during pauses in the ascent known as decompression stops , and after surfacing until the gas concentrations reach equilibrium . Divers breathing gas at ambient pressure need to ascend at a rate determined by their exposure to pressure and the breathing gas in use . A diver who only breathes gas at atmospheric pressure when free - diving or snorkelling will not usually need to decompress , Divers using an atmospheric diving suit do not need to decompress as they are never exposed to high ambient pressure . </P>
<P> The decompression of a diver is the reduction in ambient pressure experienced during ascent from depth . It is also the process of elimination of dissolved inert gases from the diver 's body , which occurs during the ascent , during pauses in the ascent known as decompression stops , and after surfacing until the gas concentrations reach equilibrium . Divers breathing gas at ambient pressure need to ascend at a rate determined by their exposure to pressure and the breathing gas in use . A diver who only breathes gas at atmospheric pressure when free - diving or snorkelling will not usually need to decompress , Divers using an atmospheric diving suit do not need to decompress as they are never exposed to high ambient pressure . </P>
when do you need to do decompression stops
when do you need to do decompression stops
in the ascent after surfacing
in the ascent after surfacing