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Introduction

The TDI Advanced Trimix Course provides the training required to competently and safely utilize breathing gases containing helium for dives that require staged decompression, utilizing Nitrox and / or oxygen mixtures during decompression to a maximum depth of 100m / 330ft. The objective of this course is to train divers in the benefits, hazards and proper procedures of utilizing custom oxygen / helium / nitrogen mixtures as breathing gases.

Qualifications of Graduates

Upon successful completion of this course, graduates may engage in technical diving activities utilizing custom Trimix mixtures without direct supervision as long as:

• The diving activities approximate those of training.
• The area of activities approximates those of training.
• Environmental conditions approximate those of training.

Student Pre-Requisites

The student must:

• Be a minimum age of 18.
• Have a minimum certification as an Extended Range Diver or Entry Level Trimix Diver (or equivalent).
• Show proof a minimum of 100 logged dives with 25 deeper than one hundred 30m / 100ft.
• Prior logged experience w/ double cylinders and any other unfamiliar equipment. I.E. Dry suit

Graduation Requirements

In order to complete this course, students must:

• Satisfactorily complete the TDI Trimix Course written examination.
• Complete all open water requirements safely and efficiently.
• Demonstrate mature, sound judgment concerning dive planning and execution.