NAUI TECHNICAL DIVER TRAINING
Technical EANx Diver
This course is to provide the Oxygen Enriched Air Diver with the skills and knowledge needed to minimize the risks of utilizing optimal oxygen enriched air mixtures of EAN25 to EAN80 for dives to a depth of 150fsw (46 msw) not requiring stage decompression. This course may be taken in conjunction with Decompression Techniques Diver Course.
Decompression Techniques Diver Course
This course is to provide the diver with a working knowledge of the theory, methods and procedures of planned decompression diving. The course covers equipment requirements, gear configurations, decompression breathing gas mixtures, and staged decompression rigging and techniques.
Extended Range
This course is designed for more experienced technical divers who have a demonstrated need to dive on air to depths between 150 and 180 feet where helium is unavailable.
WARNING: Technical diving is a potentially dangerous activity and requires very special training, equipment and support. If you are not prepared to do the work, invest in equipment and training and do it properly, don't do it!

You can download the complete course descriptions and prerequisites here: NAUI TEC