ese e able ▁cont ingen cies . ▁ ▁Some ▁re bre ather ▁div ing ▁safety ▁issues ▁can ▁be ▁addressed ▁by ▁training , ▁others ▁may ▁require ▁a ▁change ▁in ▁technical ▁diver ▁culture . ▁A ▁major ▁safety ▁issue ▁is ▁that ▁many ▁divers ▁become ▁compla cent ▁as ▁they ▁become ▁more ▁familiar ▁with ▁the ▁equipment , ▁and ▁begin ▁to ▁neglect ▁pred ive ▁check lists ▁while ▁assemb ling ▁and ▁prepar ing ▁the ▁equipment ▁for ▁use ▁- ▁procedures ▁which ▁are ▁officially ▁part ▁of ▁all ▁re bre ather ▁training ▁program mes . ▁There ▁can ▁also ▁be ▁a ▁t endency ▁to ▁neglect ▁post - d ive ▁maintenance , ▁and ▁some ▁divers ▁will ▁d ive ▁knowing ▁that ▁there ▁are ▁functional ▁problems ▁with ▁the ▁unit , ▁because ▁they ▁know ▁that ▁there ▁is ▁generally ▁redund ancy ▁designed ▁into ▁the ▁system . ▁This ▁redund ancy ▁is ▁intended ▁to ▁allow ▁a ▁safe ▁term ination ▁of ▁the ▁d ive ▁if ▁it ▁occurs ▁under water , ▁by ▁elimin ating ▁a ▁critical ▁failure ▁point . ▁D iving ▁with ▁a ▁unit ▁that ▁already ▁has ▁a ▁mal function , ▁means ▁that ▁there ▁is ▁a ▁single ▁critical ▁point ▁of ▁failure ▁in ▁that ▁unit , ▁which ▁could ▁cause ▁a ▁life - th re aten ing ▁emer gency ▁if ▁another ▁item ▁in ▁the ▁critical ▁path ▁were ▁to ▁fail . ▁The ▁risk ▁may ▁increase ▁by ▁orders ▁of ▁magnitude . ▁ ▁Acc ident ▁modes ▁Several ▁factors ▁are ▁ident ifiable ▁as ▁pre dis pos itions ▁to ▁acc idents ▁in ▁technical ▁div ing . ▁The ▁techniques ▁and ▁equipment ▁are ▁complex , ▁which ▁increases ▁the ▁risk ▁of ▁errors ▁or