▁increase ▁of ▁risk ▁is ▁not ▁currently ▁( 2 0 1 6 ) ▁possible , ▁ ▁Te aching ▁of ▁decom pression ▁practice ▁ ▁Basic ▁decom pression ▁theory ▁and ▁use ▁of ▁decom pression ▁tables ▁is ▁part ▁of ▁the ▁theory ▁component ▁of ▁training ▁for ▁commercial ▁divers , ▁and ▁d ive ▁planning ▁based ▁on ▁decom pression ▁tables , ▁and ▁the ▁practice ▁and ▁field ▁management ▁of ▁decom pression ▁is ▁a ▁significant ▁part ▁of ▁the ▁work ▁of ▁the ▁div ing ▁super visor . ▁ ▁Rec re ational ▁divers ▁are ▁trained ▁in ▁the ▁theory ▁and ▁practice ▁of ▁decom pression ▁to ▁the ▁extent ▁that ▁the ▁cert ifying ▁ag ency ▁spec ifies ▁in ▁the ▁training ▁standard ▁for ▁each ▁cert ification . ▁This ▁may ▁vary ▁from ▁a ▁rud iment ary ▁over view ▁sufficient ▁to ▁allow ▁the ▁diver ▁to ▁avoid ▁decom pression ▁oblig ation ▁for ▁entry ▁level ▁divers , ▁to ▁compet ence ▁in ▁the ▁use ▁of ▁several ▁decom pression ▁algorithms ▁by ▁way ▁of ▁personal ▁d ive ▁computers , ▁decom pression ▁software , ▁and ▁tables ▁for ▁advanced ▁technical ▁divers . ▁The ▁detailed ▁understanding ▁of ▁decom pression ▁theory ▁is ▁not ▁generally ▁required ▁of ▁either ▁commercial ▁or ▁recre ational ▁divers . ▁ ▁The ▁practice ▁of ▁decom pression ▁techniques ▁is ▁another ▁matter ▁altogether . ▁Rec re ational ▁divers ▁are ▁expected ▁not ▁to ▁do ▁decom pression ▁div es ▁by ▁most ▁cert ification ▁organizations , ▁though ▁C MA S ▁and ▁B S AC ▁allow ▁for ▁short ▁decom pression ▁div es ▁in ▁some ▁levels ▁of ▁recre ational ▁divers . ▁Techn ical , ▁commercial , ▁military ▁and ▁scientific ▁divers ▁may ▁all ▁be