The PADI Tec Trimix 65 course is intended to extend the depth range of technical divers already trained and qualified to use air, enriched air and oxygen for technical decompression dives beyond 50 meters /165 feet

This course opens up the advantages of trimix to the diver, and divers are qualified to make multi-stop decompression dives that employ EANx and oxygen for accelerated decompression, and any trimix with an oxygen content of 18% or more.

They can dive to a maximum depth of 65 metres/210 feet.




Certification as Tec 50 (or equivalent)

Minimum of 18 years old

Certification as PADI Rescue Diver (or equivalent)

Have a minimum of at least 100 logged dives, with the following minimums

Medical form signed by a physician




3-4 days of diving (confined open water) and 2-3 academic sessions





Depth Levels

Dive one- 30 ft max depth

Dive two -80 ft max depth

Dive three-165 ft max depth

Dive four-210 ft max depth


Course overview


Plan and execute at least five dives using EANx and trimix blends
• Use decompression software to create custom dive tables and dive plans
• Make training dives as deep as 65 metres/210 feet

Use two or more cylinders of decompression gas with one up to 100 percent oxygen to add conservatism to the required decompression.


Equipment Requirements



Each diver will be required to have a complete set of personal dive equipment, including:


Double cylinders with a minimum of 121L/70 cubic feet each, with isolator manifold Primary & secondary regulators for doubles or single with appropriate valve

One with a seven foot hose for air sharing

One with an SPG

2 or more deco tanks with regulator, SPG & staging kit – properly labeled

Back-up deco gas as required

BC, back plate & harness (dual bladder or dual wings unless drysuit diving)

Dive computer (single or multi-gas), and either back-up computer or timer & depth gauge

Back-up decompression information (computer, dive tables, etc.)

Exposure protection (dry suit use requires prior dry suit diving experience)

Weight system (if needed)

Lights as necessary, including primary and backup

Jon line (for current diving environments)

Safety reel and lift bag or DSMB. A suitable DSMB has sufficient buoyancy to help steady a diver during deco

Inflatable signal tube, whistle and/or other visual and audible surface signaling device

(2) Slates, (1 wrist-type)


Z-knife and back-up cutting device

Spare clips, pull-ties, tank wrap bands & other rigging accessories

Back-up mask (optional)

Lift bag (100lbs min)






Certification and Cost


DSAT Tec Trimix 65 Certification

Cost : $895.00