ITDA extended range Diving

Training and Certification

The ITDA Extended Range program is available to ITDA Technical Professionals who are authorised by ITDA HQ to conduct decompression diving below 50m / 165ft.  and the certification for technical divers covers: Deep Air / Mixed Gas / Decompression and Staged Decompression.

ITDA Extended Range Diving Certificationtech-dvr4

The ITDA Extended Range Course Program offers the training and experience required for safer deeper diving, including correct techniques, equipment requirements and configurations, incorporating the risks associated with deep air diving, to competently benefit from air for dives up to 60 metres/200 feet requiring staged decompression, using nitrox mixtures and / or oxygen during decompression.

N.B. It MUST be noted here that ITDA recommends the use of trimix / mixed gas below 50m/165ft. As it is safer than air!

Who will benefit from this training?exchange

  • The certified ITDA Advanced Nitrox/Decompression diver who is interested in a greater adventure / challange. this level represents the next level in technical diver training. If you are looking to expand upon your techical-diving skills, experience, or go deeper.... Then this course program will meet and exceed your needs...

Course pre-qualification

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

Minimum age 18deep-air

Certified as a TDI Advanced Nitrox Diver and TDI Decompression Procedures Diver, or equivalent

Proof of a minimum of 75 logged dives, of which 25 must be deeper than 30 metres/99 feet.

What can you expect to learn?

The ITDA Extended Range Course Program covers:gas_laws

  • History of deep air diving
  • Risk Management
  • Physics / Gas laws and Ideal Gas Laws
    • Pressure review
    • Formulas for solving dive planning problems, maximum operating depth (MOD), best mix, and more
  • Physiology and Decompression overview
    • Hypoxia
    • Oxygen toxicity
    • Nitrogen narcosis
    • Nitrogen absorption and eliminationreef
    • Carbon dioxide toxicity
    • Carbon monoxide
    • Hyperthermia
    • Hypothermia
    • Advanced Nitrox
    • Oxygen
  • Equipment considerations
  • Dive tables
  • Dive planning
    • Operation planning
    • Team planning
    • steve_flayEmergency planning
  • Safer Diving
  • Descent considerations
  • Ascent considerations
  • Technical dive support
  • Navigation

Skills to demonstrate include:

  • Risk Analysis
  • Stress analysis and mitigation
  • Gas matching procedures
  • Demonstrate buoyancy control; ability to hover at fixed position in water column without moving hands or feet
  • Show good awareness of buddy and other team members through communications, proximity and team oriented dive practices
  • Demonstrate competence managing 2 stage cylinders, either 2 deco gas or 1 deco and extra bottom gas, including drop and recovery while maintaining position in the water column
  • Demonstrate ability to confirm gas switches at depth with buddy/team membersdeco00
  • Demonstrate lift bag deployment from depth and use of bag as back-up buoyancy device
  • Demonstrate air-sharing ascent from depth while one member of buddy team is without mask, both as a donor and recipient
  • Create contingency decompression schedule after simulated loss of decompression gas
  • Remove and replace mask, deploy back up mask
  • Demonstrate tired diver tow at depth and on surface; 30 metres/100 feet lateral
  • Complete a horizontal breath-hold swim at depth for 15 metres/50 feet with mask off or blacked out
  • Properly execute the planned dive within all pre-determined limits
  • Demonstrate the proper procedures for switching and isolating a malfunctioning regulator, this skill is to be performed at a depth no deeper than 40 metres/130 feet
  • Demonstrate the proper navigational techniques for the specific dive
  • During 2 dives, demonstrate an ascent with ascent reel and lift bag and perform staged decompression
  • During one of the dives, tow a simulated unconscious diver, while at depth, 9 metres/30 feet to ascent line and simulate an emergency rescue ascent technique


Upon successful completion of this course, graduates may engage in diving activities without direct supervision under the following guidelines:

  • Activities are similar to those covered in 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 ITDA Entry level Trimix, Trimix diver and ITDA Advanced Trimix course programs

ITDA  Extended Range Diver Training requirements:

  • Satisfactorily complete the ITDA Extended Range Course Quiz with a passing score of 85%, followed by 100% remediation by the instructor
  • Complete all open water supervised training requirements efficiently
  • Demonstrate mature and sound judgment concerning dive planning and execution
  • Please mail us for more details and to find an ITDA Technical Instructor in your area....



Certification Programs