For the PADI Semi-Closed Rebreather Specialty Diver Course, having an Enriched Air (Nitrox) certification is often recommended but not always strictly required. This is because the Dolphin semi-closed rebreather uses gas mixes with higher oxygen content than regular air, similar to enriched air diving.
Many dive centers prefer or require that you already have some experience diving with enriched air to ensure you understand how higher oxygen levels affect dive planning and safety. If you don’t have the Enriched Air certification yet, some instructors might ask you to complete the Enriched Air Diver course before or alongside the rebreather training.
In short, while it may not be an official prerequisite everywhere, having your Enriched Air Diver certification is a good idea and sometimes expected before taking the Semi-Closed Rebreather Specialty course. It helps prepare you for managing oxygen exposure and dive planning with higher oxygen mixes.
To take the PADI Semi-Closed Rebreather Specialty Diver Course, you must be a certified scuba diver, typically holding at least a PADI Open Water Diver certification or an equivalent from another recognized agency. You should be comfortable and confident with your basic diving skills since this course builds on that foundation.
There’s usually a minimum age requirement of 15 years old, but this can vary depending on the dive center or local regulations. You’ll also need to have a recent medical clearance to dive, as rebreather diving can be more demanding than regular scuba.
Because this is a specialty course that involves more complex equipment and procedures, some prior diving experience is recommended to ensure you can handle the training safely and effectively.