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IANTD Advanced Nitrox

The IANTD Advanced Nitrox Course qualifies divers to use Enriched Air Nitrox from EANx 21 through EANx 50 to a depth of 42 metres during dives that require up to one staged decompression stop of 15 minutes maximum.

Sound complicated? Well it’s not. Basically this courses teaches you how to stay around the 40m recreational depth limit but stay there for much longer than advanced nitrox, twin tank diving, nitrox, decompression divingthe recreational limit of approximately 8 minutes. The payoff is that it takes 15 minutes (or less) to come to the surface and at some point, usually at 21m, we switch to a different gas, typically EANx50 to aid the body off gas the Nitrogen. Hence the name staged decompression as we carry one extra ‘stage’ tank to use on out ascent. Remember your Open Water course, your first ever confined water session when you learnt to use an alternate air source from a buddy? Well that’s all a stage decompression stop is, a change of regulator, easy as that!

IANTD Advanced Nitrox is a great course for those wanting to extend their bottom times with minimal decompression. The course cover topics like

  • Equipment requirements
  • Dive planning and gas management
  • Oxygen tracking
  • Blending methods

It is recommended that you have the PADI Advanced Open Water Certification and at least 50 dives, but the IANTD Advanced Nitrox Course can be combined with a Discover Twin Tank Dive for those who want to give it a try with less experience. The course consists of a theory+exam, a confined water session followed by four dives, two of which have simulated decompression and two with stage decompression stops.