Deep Air Diving

Limited or no access to helium. Extend your deep air dives.
TDI Scuba Diver Training Europe

TDI Extended Range Diver

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 utilising 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 utilise air for dives up to 55 metres/180 feet that require staged decompression, using nitrox mixtures or oxygen during decompression.

  • The certified TDI Advanced Nitrox/Decompression Procedures diver looking for the next step in technical dive training. Whether you’re looking to expand upon your skills, experience, or just go a little deeper to see an area of interest, this course is for you!

(these requirements must be met prior to commencement of training):

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

The TDI Extended Range Diver Course takes an in-depth look at all of the following and more:

  • History of deep air diving
  • Physics
    • Pressure review
    • Formulas for solving dive planning problems, maximum operating depth (MOD), best mix, and more
  • Physiology
    • Hypoxia
    • Oxygen toxicity
    • Nitrogen narcosis
    • Nitrogen absorption and elimination
    • Carbon dioxide toxicity
    • Carbon monoxide
    • Hyperthermia
    • Hypothermia
  • Decompression Options
    • Air
    • Nitrox
    • Oxygen
  • Equipment considerations
  • Dive tables
  • Dive planning
    • Operation planning
    • Team planning
    • Emergency planning
  • Diving procedures
  • Descent considerations
  • Ascent considerations
  • Technical dive support
  • Navigation

Upon successful completion of this course, graduates may engage in diving activities without direct supervision so long as the following limits are adhered to

  • The diving activities approximate those of training
  • The areas of activities approximate those of training
  • Environmental conditions approximate those of training
  • Upon successful completion of this course, graduates are qualified to enroll in the TDI Advanced Wreck ,TDI Trimix, and TDI Advanced Trimix courses
  • Satisfactorily complete the TDI Extended Range Course written examination with a passing score of 80%, followed by 100% remediation by the instructor
  • Complete all open water requirements efficiently
  • Demonstrate mature and sound judgment concerning dive planning and execution

Further information from TDI on this course;

Course Overview

Course Standards

What’s included in the course fee?

  • Hire of basic scuba equipment
  • Cylinders and air/nitrox fills
  • Four dives min with a minimum accumulated bottom time of 100 mins
  • 8 hours classroom and briefings
  • All supervision/training
  • eLearning when available

What’s not included in the course fee?

  • Additional manuals or literature
  • Additional, optional or remediation dives beyond course requirements
  • Additional kit hire

View our current price list here.

If you require further information or wish to book your next course please get in touch.