· Must be a PADI Advanced Open Water Diver (or qualifying certification from another organization) or a PADI Open Water Diver (or qualifying certification from another organization) with proof of at least 10 logged dives beyond open water training dives, and be a PADI Enriched Air Diver (or qualifying certification from another organization)

· Number of Dives: Three

· Advantages and disadvantages

· Assembly, disassembly and maintenance

· Dive planning and emergency procedures with semiclosed rebreathers

· Certification counts toward the PADI Master Scuba Diver rating.

· Dive nearly bubble free.

Through either the Semiclosed Rebreather Draeger Dolphin/Atlantis Specialty course or the Semiclosed Rebreather Draeger Ray Specialty course you learn the special procedures for semiclosed rebreather diving. This includes special dive planning, organization, procedures and potential hazards, many of which differ significantly from conventional (open circuit) scuba.