The TDI Advanced Trimix Course provides the training required to competently & safely utilize breathing gases containing helium for dives that require staged decompression, utilizing nitrox & oxygen mixtures during decompression to a maximum depth of 100 m.
The objective of this course is to train divers in the benefits, hazards & proper procedures of utilizing custom oxygen/helium/nitrogen mixtures as breathing gases. Gas mixes used on this course will examine the use of hypoxic mixes (oxygen content with less than 16% oxygen) an TRIOX & EANX for staged decompression. In Deep Dive Centre does not exceed an END of 30m at any depth of training.
The course is normally run over 5 consecutive days (although flexibility is available upon application). A minimum of 4 training dives are required for successful completion. The course fee includes required course manual & TDI certification fees. Boat fees & gas fills are not included. As on all higher level technical courses, instructor boat fees & gas costs are shared between students.
Minimum age of 18 years.
Minimum certification of TDI Normoxic Trimix (or equivalent).
100 logged dives; 25 of these logged as decompresion dives deeper than 30 m.
Dry suit exposure protection system.
O2 clean manifolded twin set
Back gas regulators: 2 first stages, suppling an SPG, BC inflation & 2 second stages, 1 second stage must be on a 1.5 - 2m hose.
Separate suit inflation cylinder (Argon cylinder).
First stages & valves should be DIN.
Buoyancy compenstor, stream lined in design & adequate for equipment configuration, ideally with rigid backplate & single piece harness.
2 x O2 clean stage cylinder for decompression gas including 1 first stage, 1 second stage & SPG regulator configuration.
A primary & redundant light system.
2 x wrist mounted, time & depth measuring device.
1 wrist mount compass.
At least 1 cutting tool.
Underwater wet notes.
Primary & redundant surface marker buoys & Reels.
Rigid non spilt fins.
In Deep is able to provide all of the required equipment for hire for the duration of course, please note candidates must be familiar with the equipment they will be using for the course.
Demonstrate familiarity with basic & intermediate hand signals.
Select & prepare of equipment suitable for soft overhead environment with long decompression obligations.
Conduct team oriented drills for SMB deployment & gas switching procedure.
Drills for buddy rescue.
Stress analysis & mitigation.
Demonstrate buoyancy control (ability to hover at fixed position in water column without moving hands or feet).
Show good awareness of buddy & other team members through communications, proximity & team oriented dive practices.
Demonstrate competence managing three stage cylinders including drop and recovery while maintaining position in the water column.
Ability to manage multiple failures in adverse conditions.
Complete a horizontal breath hold swim at depth for 20 meters with mask off or blacked out.
Deploy lift bag while sharing air on buddy's long hose.
Satisfactorily complete the TDI Trimix Course written examination.
Complete all open water requirements safely & efficiently.
Demonstrate mature, sound judgment concerning dive planning & execution.
Please Note: Course prices inclusive of materials & certification fees. Students are expected to cover their own gas costs, boat charter, transportation, accodomation (if applicable), equipment hire (if applicable) & quarry entry fees (if applicable)
& contribute towards instructors costs.