TDI Extended Range Diver



The TDI Extended Range course provides training and experience required to competently utilize air for dives up to 55 metres / 180 feet that requires staged decompression, utilizing nitrox mixtures or oxygen during decompression.  The objective of this course is to train divers in the proper techniques, equipment requirements, and hazards of deep air diving to a maximum of 55 metres / 180 feet utilizing nitrox mixtures or oxygen for staged decompression. This course is taught with each diver using 4 full size tank (S80 or larger) and is one of the more challenging courses in technical diving

Who is this course for

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. The rewards will be greater as you can now access some of our deeped walls such as Tanga and Umeeds

Course 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

What you can expect to learn

  • 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

  • Physiology

What’s in it for you

  • Ability to conduct dives with 2 stages and three different gases to a maximum depth of 55m

  • Ability to plan and execute longer more complex dives allowing you to explore new deeper sites


3 days/4 dives

Extended Range certification requirements

  • Satisfactorily complete the TDI Extended Range course written examination

  • Complete all open water requirements safely and efficiently

  • Demonstrate mature, sound judgment concerning dive planning and execution