If stealth diving appeals to you then the PADI Semiclosed Rebreather Diver Specialty course will interest you. You can dive nearly bubble free after you learn to use your semiclosed rebreather - good for photography or just seeing aquatic life up close and personal.
What do I need to start?
PADI Advanced Open Water Diver or PADI Open Water Diver certification with proof of at least 10 logged dives beyond initial training (or equivalent)
PADI Enriched Air Diver certification (or equivalent)
Minimum age: 15 years old
What will I do?
The course introduces semiclosed rebreather dive planning, organization, procedures and potential hazards, specifically focusing on the Drager Ray, Dolphi/ Atlantis semiclosed rebreather.
How long will it take?
Recommended Course Hours: 24
Minimum Open Water Training: three dives over a recommended two days
What next?
You can apply this Specialty certification toward your Master Scuba Diver rating.