These courses are to provide the diver with the skills and knowledge needed to minimize the risks of utilizing helium-based tri-mix breathing gas mixes for dives to a maximum depth of 300 fsw (91 msw) requiring stage decompression and utilizing EANx mixtures and/or oxygen during decompression. There are two levels, called Tri-Mix Diver Level I and Tri-Mix Diver Level II.

Required manuals for this course are the NAUI Trimix workbook and the TDI Trimix Manual.

QUALIFICATIONS OF GRADUATES

Upon successful completion of the Level I course, graduates are considered competent to plan and execute technical dives that require stage decompression and utilize helium-based tri-mix breathing gas mixtures and EANx and/or oxygen for stage decompression without direct supervision to depths not to exceed 225 fsw (69 msw) provided the diving activities and the areas dived approximate those of training. Level II graduates are considered competent to plan and execute technical dives that require stage decompression and utilize helium-based tri-mix breathing gas mixtures and EANx or oxygen for stage decompression without direct supervision to depths not to exceed 300 fsw (91 msw) provided the diving activities and the areas dived approximate those of training.

PREREQUISITES FOR ENTERING THE COURSE

	Minimum age of 21.
	Minimum certification as a NAUI Decompression Techniques, and Technical EANx Diver or equivalent.
	Minimum of 250 logged dives 75 of which must have been deeper than 130 fsw (40 msw) and 10 of which must have been deeper than 160 fsw (49 msw)

COURSE POLICIES

	Key West Classroom hours– 18 are estimated
	Open water dives – six for level I and eight for level II
	For Level I at least two dives must be deeper than 190 fsw (58 msw)
	For level II the additional two dives must exceed 225 fsw (69 msw)