<P> Many experienced divers return to NDSTC for further course work so they can qualify as First Class divers and Master divers . </P> <P> A Navy diver gets specialized training in demolition and mixed - gas diving . </P> <P> Navy divers work in extreme conditions, performing various underwater tasks ranging from underwater ship repair, underwater salvage and special operations / special warfare type diving . Because their area of operations are so varied, they can be required to utilize any type of diving equipment for use in any depth or temperature in any part of the world . Certain diving qualification allows NDs to live and work at extreme depths for days or weeks at a time, a discipline known as saturation diving . </P> <P> Navy enlisted personnel that graduate from second class or first class dive school; and ultimately master diver comprise the Navy Diver rating . NDs are the in - water operators and supervisors for the various mission areas mentioned previously as their primary day to day mission is that of in - water operator and / or supervisor . There are three enlisted diving badges / qualifications in the ND rating: </P>

Does the navy still have deep sea divers