ADVANCED DEEP DIVER : Diving on Nitrox and air to max. 50 msw.
Step one: Max. depth 40 msw, just simulated deco stops – could leave course at this point for standard recreational certification as Specialty Deep Diver.
Step two: Down to 45-50 msw. Decompression (with EANx) dives. Reel & lift bag use for deco line.
Prerequisites: Advanced scuba diver with practice.

EXTENDED RANGE DIVER : Diving on air down to max. 65msw, using EANx and/or Oxygen for travel mix and decompression.
Double tanks and stage bottle. Reel & lift bag use for deco line.
Prerequisites: Advanced deep diver with practice & Nitrox diver.

NORMOXIC TRIMIX DIVER : Diving normoxic Trimix (bottom gas) and Nitrox (travel & deco gas). Double tanks with stage bottles.
Max. course depth 65 msw. Prerequisites: Advanced Deep diver with more than 25 AD dives and Nitrox diver.

ADVANCED TRIMIX DIVER : Diving Trimix (bottom gas) and Nitrox (travel & deco gas). Double tanks with stage bottles.Max. course depth 90 msw.
Prerequisites: Extended range or Normoxic Trimix diver with more than 25 Ext.Rg./NTrx dives.