▁This ▁can ▁be ▁a ▁backup ▁computer , ▁a ▁written ▁schedule ▁with ▁watch ▁and ▁depth ▁gauge , ▁or ▁the ▁d ive ▁bud dy ' s ▁computer ▁if ▁they ▁have ▁a ▁reason ably ▁similar ▁d ive ▁profile . ▁If ▁only ▁no - stop ▁div ing ▁is ▁done , ▁and ▁the ▁diver ▁makes ▁sure ▁that ▁the ▁no - stop ▁limit ▁is ▁not ▁exceed ed , ▁a ▁computer ▁failure ▁can ▁be ▁managed ▁at ▁acceptable ▁risk ▁by ▁starting ▁an ▁immediate ▁direct ▁as cent ▁to ▁the ▁surface ▁at ▁an ▁appropriate ▁as cent ▁rate . ▁ ▁No ▁decom pression ▁div es ▁ ▁A ▁" no ▁decom pression ", ▁or ▁" no ▁stop " ▁d ive ▁is ▁a ▁d ive ▁that ▁needs ▁no ▁decom pression ▁stops ▁during ▁the ▁as cent ▁according ▁to ▁the ▁chosen ▁algorithm ▁or ▁tables , ▁and ▁re lies ▁on ▁a ▁controlled ▁as cent ▁rate ▁for ▁the ▁elim ination ▁of ▁excess ▁in ert ▁g ases . ▁In ▁effect , ▁the ▁diver ▁is ▁doing ▁continuous ▁decom pression ▁during ▁the ▁as cent . ▁ ▁Saf ety ▁stop ▁ ▁As ▁a ▁pre ca ution ▁against ▁any ▁un not iced ▁d ive ▁computer ▁mal function , ▁diver ▁error ▁or ▁phys i ological ▁pre dis position ▁to ▁decom pression ▁sick ness , ▁many ▁divers ▁do ▁an ▁extra ▁" s af ety ▁stop " ▁in ▁addition ▁to ▁those ▁pres cribed ▁by ▁their ▁d ive ▁computer ▁or ▁tables . ▁A ▁safety ▁stop ▁is ▁typically ▁ 1 ▁to ▁ 5 ▁minutes ▁at ▁. ▁They ▁are ▁usually ▁done ▁during ▁no - stop ▁div es ▁and ▁may ▁be ▁added