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| File:IMCMEX 141028-N-BJ279-030 (15670839711).jpg | A diver enters the water watched by the supervisor and standby diver, with warning flags flying

|File:US Navy 090423-N-4301H-044 Basic Underwater Demolition SEAL (BUD-S) candidates check their underwater breathing apparatuses for proper ventilation and safety before participating in dive training in Coronado Bay.jpg |Trainees check their rebreathers for correct function before use

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