tech specialists


technical diving in phuket


TDI Extended Range Instructor Course

courses > technical > tdi extended range instructor

Course Overview

This course provides training and experience required to compentently teach air for dives up to 55msw that requires stage decompression, utilizing Nitrox mixtures or oxygen during decompression. The objective of this course is to train instructors in proper techniques, and hazards of deep air diving.


Minimum age of 21.
Advanced Nitrox Instructor certified.
Decompression Procedures Instructor certified.
Extended Range diver certified.
Proof of 250 logged dives out of which 25 must be extended range dives.
Proof of 10 student certification at Advanced Nitrox and 5 minimum at Decompression Procedures level.

Details of the course

The Extended Range instructor course covers:

  • History of deep air diving
  • Physics
  • Physiology
  • Decompression options
  • Equipment consideration
  • Dive tables & dive computers
  • Dive planning
  • Procedures

Course duration and number of dives

The Extended Range instructor course is a 4 day course and 6 dives are required.

Course Price

currency converter TERI

Additional costs

Technical Rental equipment if needed. set p/day
TDI Extended Range Instructor Manual
TDI Standards & Procedures Instructor Manual
TDI Evaluation forms

Equipment requirement

The Extended Range Instructor course has some specific equipment required for this course on top of the standard gear. All students must own or purchase a spool, SMB and wrist slate. The oxygen clean regulators can be purchased or rented. We supply the double tank, decompression tanks, mixes and the oxygen analyser.

Got something to ask us ?

We are Technical diving education professionals and over the years we have been asked almost everything, feel free to look at our most commonly asked technical diving questions or contact us directly.