Yannick Antoine

TDI Extended Range

The TDI Extended Range course is for Advanced Nitrox & Decompression Procedures diver with some experience looking to take their diving to the next level. The dives will be longer and more complex with multiple gas switches and more advanced scenarios.


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01 Prerequisites

Minimum age 18
Certified as a TDI Advanced Nitrox Diver and TDI Decompression Procedures Diver, or equivalents
Provide proof of a minimum of 100 logged dives, of which 25 must be deeper than 30 metres / 100 feet

02 Additional information

Certain areas of the world provide spectacular dives at depths deeper than 39 metres/130 feet but you may not have access (or very limited access) to helium. The TDI Extended Range course teaches you the proper techniques for utilizing compressed air as a breathing gas, and with a maximum depth of 55 metres/180 feet, so you don’t have to miss those dives! The TDI Extended Range Diver Course provides the training and experience necessary including proper techniques, equipment requirements, and hazards of deep air diving, to competently utilize air for dives up to 55 metres/180 feet that require staged decompression, using nitrox mixtures or oxygen during decompression.

03 Course contents

Equipment considerations
Diving with 2 stages
Planning dives with multilevel gas, travel gas, extended bottom gas
Procedures for dives with up to 3 gases
Advanced technical rescue skills
Advanced self-rescue skills
Emergency planning