pression ▁stop ▁increases ▁the ▁risk ▁of ▁developing ▁decom pression ▁sick ness . ▁The ▁risk ▁is ▁related ▁to ▁the ▁depth ▁and ▁duration ▁of ▁the ▁missed ▁stops . ▁The ▁usual ▁causes ▁for ▁missing ▁stops ▁are ▁not ▁having ▁enough ▁breath ing ▁gas ▁to ▁complete ▁the ▁stops ▁or ▁accident ally ▁losing ▁control ▁of ▁bu oy ancy . ▁An ▁aim ▁of ▁most ▁basic ▁diver ▁training ▁is ▁to ▁prevent ▁these ▁two ▁fault s . ▁There ▁are ▁also ▁less ▁predict able ▁causes ▁of ▁missing ▁decom pression ▁stops . ▁D iving ▁suit ▁failure ▁in ▁cold ▁water ▁may ▁force ▁the ▁diver ▁to ▁choose ▁between ▁hypoth erm ia ▁and ▁decom pression ▁sick ness . ▁D iver ▁injury ▁or ▁marine ▁animal ▁attack ▁may ▁also ▁limit ▁the ▁duration ▁of ▁stops ▁the ▁diver ▁is ▁willing ▁to ▁carry ▁out . ▁A ▁procedure ▁for ▁dealing ▁with ▁omitted ▁decom pression ▁stops ▁is ▁described ▁in ▁the ▁US ▁Navy ▁D iving ▁Man ual . ▁In ▁principle ▁the ▁procedure ▁allows ▁a ▁diver ▁who ▁is ▁not ▁yet ▁present ing ▁sympt oms ▁of ▁decom pression ▁sick ness , ▁to ▁go ▁back ▁down ▁and ▁complete ▁the ▁omitted ▁decom pression , ▁with ▁some ▁extra ▁added ▁to ▁deal ▁with ▁the ▁b ub bles ▁which ▁are ▁assumed ▁to ▁have ▁formed ▁during ▁the ▁period ▁where ▁the ▁decom pression ▁ce iling ▁was ▁viol ated . ▁D ivers ▁who ▁become ▁sympt om atic ▁before ▁they ▁can ▁be ▁returned ▁to ▁depth ▁are ▁treated ▁for ▁decom pression ▁sick ness , ▁and ▁do ▁not ▁attempt ▁the ▁omitted ▁decom pression ▁procedure ▁as ▁the ▁risk ▁is ▁considered ▁un accept able ▁under ▁normal ▁oper ational ▁circumstances .