▁can ▁be ▁supplied ▁from ▁the ▁div ing ▁panel , ▁and ▁the ▁operations ▁can ▁continue ▁with ▁less ▁delay . ▁ ▁A ▁typical ▁surface ▁decom pression ▁procedure ▁is ▁described ▁in ▁the ▁US ▁Navy ▁D iving ▁Man ual . ▁If ▁there ▁is ▁no ▁in - water ▁ 4 0   ft ▁stop ▁required ▁the ▁diver ▁is ▁sur fac ed ▁directly . ▁Otherwise , ▁all ▁required ▁decom pression ▁up ▁to ▁and ▁including ▁the ▁ 4 0   ft ▁( 1 2   m ) ▁stop ▁is ▁completed ▁in - water . ▁The ▁diver ▁is ▁then ▁sur fac ed ▁and ▁press ur ised ▁in ▁a ▁chamber ▁to ▁ 5 0   f sw ▁( 1 5   ms w ) ▁within ▁ 5 ▁minutes ▁of ▁leaving ▁ 4 0   ft ▁depth ▁in ▁the ▁water . ▁If ▁this ▁" sur face ▁interval " ▁from ▁ 4 0   ft ▁in ▁the ▁water ▁to ▁ 5 0   f sw ▁in ▁the ▁chamber ▁exceed s ▁ 5 ▁minutes , ▁a ▁penalty ▁is ▁in cur red , ▁as ▁this ▁indicates ▁a ▁higher ▁risk ▁of ▁D CS ▁sympt oms ▁developing , ▁so ▁longer ▁decom pression ▁is ▁required . ▁ ▁In ▁the ▁case ▁where ▁the ▁diver ▁is ▁successfully ▁recom pressed ▁within ▁the ▁nom inal ▁interval , ▁he ▁will ▁be ▁decom pressed ▁according ▁to ▁the ▁schedule ▁in ▁the ▁air ▁decom pression ▁tables ▁for ▁surface ▁decom pression , ▁prefer ably ▁on ▁o xygen , ▁which ▁is ▁used ▁from ▁ 5 0   f sw ▁( 1 5   ms w ), ▁a ▁partial ▁pressure