A "Master Diver" is a professional diver who has achieved a high level of skill and experience in various diving techniques and environments. This certification is often awarded by organizations such as PADI or NAUI and requires extensive training, including advanced diving courses and practical experience. Master Divers are proficient in underwater navigation, rescue techniques, and managing diving emergencies. To become a Master Diver, individuals must complete a series of prerequisites, including lower-level certifications and a minimum number of logged dives. This designation allows divers to lead dive trips, teach others, and participate in more complex diving activities, such as wreck diving or cave diving.