▁each ▁stop ▁being ▁longer ▁but ▁shall ower ▁than ▁the ▁previous ▁stop . ▁ ▁Deep ▁stops ▁ ▁A ▁deep ▁stop ▁was ▁originally ▁an ▁extra ▁stop ▁introduced ▁by ▁divers ▁during ▁as cent , ▁at ▁a ▁greater ▁depth ▁than ▁the ▁deep est ▁stop ▁required ▁by ▁their ▁computer ▁algorithm ▁or ▁tables . ▁This ▁practice ▁is ▁based ▁on ▁empir ical ▁observations ▁by ▁technical ▁divers ▁such ▁as ▁Richard ▁P yle , ▁who ▁found ▁that ▁they ▁were ▁less ▁fat igu ed ▁if ▁they ▁made ▁some ▁additional ▁stops ▁for ▁short ▁periods ▁at ▁depth s ▁consider ably ▁deeper ▁than ▁those ▁calculated ▁with ▁the ▁currently ▁published ▁decom pression ▁algorithms . ▁More ▁recently ▁computer ▁algorithms ▁that ▁are ▁claimed ▁to ▁use ▁deep ▁stops ▁have ▁become ▁available , ▁but ▁these ▁algorithms ▁and ▁the ▁practice ▁of ▁deep ▁stops ▁have ▁not ▁been ▁ade qu ately ▁valid ated . ▁Deep ▁stops ▁are ▁likely ▁to ▁be ▁made ▁at ▁depth s ▁where ▁ing ass ing ▁continues ▁for ▁some ▁slow ▁t issues , ▁so ▁the ▁addition ▁of ▁deep ▁stops ▁of ▁any ▁kind ▁can ▁only ▁be ▁included ▁in ▁the ▁d ive ▁profile ▁when ▁the ▁decom pression ▁schedule ▁has ▁been ▁computed ▁to ▁include ▁them , ▁so ▁that ▁such ▁ing ass ing ▁of ▁slower ▁t issues ▁can ▁be ▁taken ▁into ▁account . ▁Nevertheless , ▁deep ▁stops ▁may ▁be ▁added ▁on ▁a ▁d ive ▁that ▁re lies ▁on ▁a ▁personal ▁d ive ▁computer ▁with ▁real - time ▁computation , ▁as ▁the ▁P DC ▁will ▁track ▁the ▁effect ▁of ▁the ▁stop ▁on ▁its ▁decom pression ▁schedule . ▁Deep ▁stops ▁are ▁otherwise ▁similar ▁to ▁any ▁other ▁st aged