▁and ▁the ▁d ive ▁team ▁leader ▁is ▁more ▁the ▁navig ator , ▁or ▁the ▁person ▁in ▁front ▁of ▁the ▁group ▁than ▁someone ▁making ▁safety ▁dec isions ▁for ▁other ▁divers . ▁Most ▁technical ▁divers ▁follow ▁the ▁principle ▁that ▁any ▁diver ▁may ▁call ▁an ▁end ▁to ▁a ▁d ive ▁at ▁any ▁time ▁for ▁any ▁reason , ▁and ▁that ▁the ▁team ▁will ▁comp ly , ▁following ▁the ▁previously ▁agreed ▁term ination ▁procedure . ▁ ▁NA UI ▁has ▁a ▁Techn ical ▁Support ▁Le ader ▁course ▁that ▁is ▁designed ▁to ▁train ▁NA UI ▁Div em aster s ▁and ▁Ass istant ▁Inst ruct ors ▁who ▁are ▁also ▁technical ▁divers ▁in ▁this ▁role . ▁ ▁Professional ▁div ing ▁Professional ▁divers ▁generally ▁work ▁in ▁teams ▁which ▁have ▁one ▁or ▁more ▁divers ▁in ▁the ▁water ▁and ▁a ▁super visor ▁on ▁the ▁surface , ▁with ▁one ▁or ▁more ▁assist ants ▁for ▁handling ▁lif elines , ▁um bil ical s , ▁communic ations , ▁gas ▁pan els ▁and ▁other ▁support ▁equipment , ▁and ▁a ▁ ▁who ▁is ▁responsible ▁for ▁assist ing ▁or ▁res cu ing ▁the ▁in - water ▁divers ▁in ▁an ▁emer gency . ▁In ▁these ▁circumstances ▁the ▁super visor ▁has ▁a ▁high ▁and ▁leg ally ▁defined ▁level ▁of ▁responsibility ▁for ▁the ▁safety ▁of ▁the ▁d ive ▁team ▁and ▁anyone ▁else ▁on ▁site . ▁ ▁Emp loyment ▁opportun ities ▁and ▁conditions ▁Div em aster s ▁have ▁the ▁ability ▁to ▁work ▁in ▁hol iday ▁destin ations ▁in ▁many ▁parts ▁of ▁the ▁world . ▁They ▁may ▁work ▁in ▁div ing ▁resort s , ▁private ▁y