Tec Trimix 90

TecRec Course Technical-Diving-Philippines

Tec Trimix 90 Course Outline

The Tec Trimix 90  finalizes the  technical training program; taking divers to full/advanced  deep trimix decompression competency. Certified Tec trimix divers are qualified to make multi-gas decompression dives using hypoxic (<18%) trimix,  EANx and oxygen. Training dives are limited to 90m depth.

The Tec65 diver comes to the course with a strong knowledge and skill base. The Tec Trimix course extends these, expanding existing skills and with an added emphasis on mission planning and execution; whilst dealing with increased complexity and deep-water physiological issues.

Perfect for –

  • Technical divers seeking extended bottom time beyond 65m
  • Unlimited accelerated decompression and full depth range
  • Comprehensive understanding of diving physics andphysiology
  • Advanced decompression science

TecTrimix Course Content –

  • Knowledge Development and exam
  • Practical Applications
  • 8x Open Water Dives (4+ cylinders)

Tec Trimix Prerequisites –

  • Tec65 Diver, or equivalent (extended range / normoxic trimix)
  • 150 Logged Dives
  • 18 years or over
  • Demonstrable, expert, technical diving skills


Course Duration

6 days minimum* with classroom, practical workshops and 8 dives

Day 1 – Classroom theory, equipment workshop and practical applications

Day 2 – Skills training dives 1 – 2

Day 3 – Classroom theory, equipment workshop and practical applications

Day 4 – Classroom theory, practical application and technical dive 3 -4

Day 5 – Classroom theory, practical application and technical dive 5 -6

Day 6- Classroom theory, practical application and technical dive 7 -8

*A 7-8 day program is recommended if you prefer a more relaxed training program or more time to refine skills.

Pre-study of course materials/completion of knowledge reviews can shorten the course duration. This is highly recommended. You may obtain your own copy of the TecRec ‘Trimix’ manual in advance, or I can email handouts/reviews.

The course is performance based, not time based. Performance requirements for each section must be satisfied to allow progression and certification.

Tec Trimix Equipment Requirements –

  • Double cylinders of at least 12 l/70 cf each, with isolator manifold.
  • The isolator manifold is not required for divers using sidemount configuration.
  • Primary and secondary regulators for back mounted double manifolds, one
  • with two metre/seven foot hose for air sharing and one with SPG. Note: In sidemount configuration, one regulator must have the two metre/seven foot hose, and both regulators must have an SPG.
  • 2x Stage/decompression cylinders with regulator and SPG, with proper labels/markings.
  • Tec diving BCD(s) and harness (backmount or sidemount)
  • Two multigas enriched air capable dive computers, or one multigas enriched air computer and a back up single gas computer with dive tables, or one single gas enriched air computer and a backup timer and depth gauge with dive tables.
  • Exposure suit appropriate for environment and dive duration
  • Weight system (if needed). Note: Students and staff should weight for the contingency of decompressing with near-empty primary cylinders and empty or absent stage/deco cylinders.
  • Jon line (as needed for environment)
  • Inflatable signal tube, whistle and/or other visual and audible surface signaling devices. Note that a sausage type DSMB may double for the inflatable signal tube.
  • Reel and lift bag (bright yellow preferred) or DSMB. A suitable DSMB has sufficient buoyancy to help steady a diver during a drifting decompression, and is unlikely to spill when deployed from the underwater.
  • Knife/cutting device and back up
  • Slate or Wetnotes
  • Back up mask (optional)
  • Compass
  • Lights (optional – as required for dive environment)
  • Backup buoyancy control – the student must have a reliable means for controlling buoyancy and maintaining decompression stops in mid-water with a failed primary BCD. This is usually accomplished with a backup BCD (double wings)

Assessment of Technical Dive Training Readiness

In preparation for the course and before beginning open water dive training, there will be an informal assessment of the potential student’s skills and comfort level in water, along with a general assessment dive knowledge. If the potential student appears to lack dive readiness appropriate for the training level, remedial training will be offered before training progresses.

Contact me to discuss your training requirements.

Read/Download PDF Tech Courses Brochure


Sidemount Technical Wreck Course-Flow-Diagram