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NAUI Training Course

Heliair Diver


This course is to provide the training and experience necessary to understand the hazards of and utilise Heliair for dives to a maximum of 55 metres that require stage decompression, utilising EANx mixtures and/or oxygen during decompression. (This course may be combined with the Decompression Techniques Diver Course. The resulting course would require twelve dives for certification.)


Upon successful completion of this course, graduates are considered competent to plan and execute extended range dives that require stage decompression and utilise Heliair and EANx and/or oxygen for stage decompression without direct supervision, provided the diving activities and the areas dived approximate those of training.


Minimum age of 18.
Minimum of 75 logged dives, at least 10 of which have been decompression dives in the environment in which the course is being taught.
Certification as a NAUI Technical EANx Diver. Decompression Techniques Diver (unless combined with this course) and NAUI Helitrox Diver (or equivalent) is required.


Classroom hours – eight are estimated.

Open Water Dives – six. All dives must be deeper than 30 metres with two dives deeper than 40 metres and two dives deeper than 48 metres. Training depths shall not exceed 55 metres. No dives are to exceed 30 metres until a student has satisfactorily demonstrated equipment configuration and management during open water assessment dive(s).


The students are to analyse their own breathing gas mixture and to plan and safely execute each dive. Dive planning shall include limits based on gas consumption, oxygen toxicity exposures and inert gas absorption for each dive and breathing gas mixture. Each diver is to demonstrate switching and isolating a malfunctioning regulator, first in confined water and, following adequate practice, at a depth between 10 and 20 metres and underwater navigation appropriate to the dive plan. Students shall participate in a diver rescue simulation to include management of a diver experiencing underwater oxygen toxicity during a screening dive that is in addition to the six required dives. On at least two of the required dives, ascend with ascent reel and DSMB and perform necessary or simulated stage decompression.

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