 During the 1980s the US recreational diving community tended to move away from the US Navy tables to a range of tables published by other organisations, including several of the diver certification agencies (BSAC, NAUI, PADI).Depending on the table or computer chosen the range of no-decompression limits at a given depth on air can vary considerably, for example for 100 fsw (30 msw) the no stop limit varies from 25 to 8 minutes.It is not possible to discriminate between "right" and "wrong" options, but it is considered correct to say that the risk of developing DCS is greater for the longer exposures and less for the shorter exposures.