Rebreather diver no deco

Qualifies for diving with CCR without decompression.

Maximum depth: 30 meters.

Advanced rebreather diver

Qualifies for diving with CCR using Nitrox pre-mix or air diluent during decompression diving activities.

Maximum depth: 45 meters.

Technical rebreather diver

Qualifies for using a rebreather with helium diluent and oxygen from 17 to 21%, +/- 1%.

Maximum depth: 45 meters.

Fundamentals mixed gas rebreather

Qualifies for using a rebreather with a helium-based diluent with 17% oxygen or higher.

Maximum depth: 60 meters.

Expedition mixed gas rebreather

Qualifies for using the CCR with a helium-based diluent suitable for depth.

Maximum depth: 75 meters.

Explorer mixed gas rebreather

Qualifies for using the rebreather with a helium-based diluent suitable for depth.

Maximum depth: 100 meters.