Helitrox Diver


This course is to provide the training and experience necessary to gain the knowledge and understand the hazards of utilizing helium enriched EANx mixes of 21%-30% oxygen and no more than 35% helium for dives to a maximum depth of 52m (170 ft.) that require staged-decompression, utilizing EANx mixtures and/or oxygen during decompression. Upon successful completion of this course, graduates are considered competent to plan and execute helitrox based dives that may require staged decompression and utilize EANx and/or oxygen for staged decompression without direct supervision, provided the diving environment, activities, areas dived, and equipment approximate those of training.


  • Age. Minimum is 18 years by the water phase of the course.
  • Certification/Experience/Knowledge.
      • NAUI Technical Decompression Diver or equivalent. (This course may be combined with theNAUI Technical Decompression Diver course.)
        • Proof of at least 50 logged dives with 15 dives on EANx.
          • The instructor is to ensure adequate student knowledge and capability before any open water training and shall use skill or other evaluations to do so. One open water dive (which does not count toward the minimum number of dives required for the course) may be used as a screening and evaluation dive. This is not required when the student’s diving proficiencies are well known to the instructor.