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: Second class diver - E-4 to E-5 personnel. This is the basic diving qualification in the ND rating, awarded upon completion of ND 'A' School (pin awarded upon warfare qualification). Primary duties are to serve as in-water operators during various missions. First class diver - E-6 to E-8 personnel. Advanced diving qualification awarded upon completion of ND 'C' School. In addition to duties as a second class diver, first class divers serve as diving and chamber treatment supervisors. Master diver - The highest enlisted diving position in the Navy. Awarded upon successful completion of the master diver course which includes exceptionally demanding diving operational problems and acceptance by a master diver board. Oversees diving operations and train/qualify diving supervisors. Personnel in the CEC Seabee ratings can qualify as underwater construction technician (UCT). Like other Navy divers, UCTs are primary in-water operators that conduct underwater construction and demolitions. The three qualification that the various rate can obtain with are as follows: Basic Underwater Construction Technician/ NEC 5932 (2nd Class Diver), Advanced Underwater Construction Technician/ NEC 5931 (1st Class Diver), and Master Underwater Construction Technician/ NEC 5933 (Master diver). Navy hospital corpsmen can qualify as a diving medical technician (DMT), where they are given training in medical aspects of diving. Primary responsibilities are to provide medical advice and treatment to diving personnel. They also instruct members of the diving team in first aid procedures when the presence of diving medical personnel is indicated. Additionally, there is a scuba diver qualification primarily for those stationed on submarines to serve as sub divers in a limited capacity. Navy scuba divers are also trained at NDSTC at a 5-week course. Their duties consist primarily of conducting occasional inspections on the submarine they are stationed on. Scuba divers maintain their traditional Navy rating such as ET or MM; their diving Navy Enlisted Classification (NEC) is a collateral duty, not their primary one. U.S. navy diver physical fitness test Diving medical personnel evaluate the fitness of divers before operations begin and are prepared to handle any emergencies which