Extended Range

What is it?
This course provides training and experience required to competently utilize air for dives up to 180 fsw 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 180 fsw utilizing Nitrox mixtures or oxygen for staged decompression.

What will we do? (Overview)

  • History of Deep Air Diving
  • Physics
  • Physiology
  • Decompression Options
  • Equipment Considerations
  • Dive Tables
  • Dive planning
  • Procedures

Open Water Skills:

  • Properly analyze all gas mixtures to be used.
  • Demonstrate adequate pre-dive planning
  • Properly execute the planned dive within all pre-determined limits.
  • Demonstrate the proper procedures for switching and isolating a malfunctioning regulator
  • Demonstrate the proper navigational techniques for the specific dive.
  • On 2 dives, demonstrate an ascent with ascent reel and lift bag and perform staged decompression.
  • On 1 of the dives, tow a simulated unconscious diver, while at depth to the ascent line and simulate an emergency rescue ascent technique.

How long will it take?

  • Classroom/Briefings- Approximately 8 hours
  • Open water dives
    • 4 dives with a minimum accumulated bottom time of 100 minutes.
    • All dives must be deeper than 100 fsw with 4 dives deeper than 130 fsw.


  • Minimum age of eighteen (18).
  • Certified TDI Advanced Nitrox Diver and TDI Decompression Procedures Diver (or equivalents)
  • Minimum 100 logged dives, of which 25 must be deeper than 100 fsw.

Equipment Needed:

  • Bottom Mix Cylinder(s) (Doubles)
  • Cylinder volume appropriate for planned dive and gas consumption.
  • Dual outlet valve, double manifold or independent doubles.
  • Labeled in accordance with TDI Standards.
  • Travel Mix Cylinder
  • Decompression Mix Cylinder
  • Regulator(s)(x4)
  • Primary and primary redundant required on all bottom mix cylinders
  • Submersible pressure gauges (x3), required on all primary / bottom mix cylinder(s)
  • A long hose second stage, 7′ recommended
  • Buoyancy Compensator adequate for equipment configuration
  • Redundant Depth and Timing Devices
  • Air decompression computers allowed for use as depth and timing devices
  • Redundant Light System (Primary & Backup, at minimum)
  • Jon-line and other rigging lines as dictated by site conditions
  • Reel/Spool (150′) with Lift Bag (50 lb min)/Surface Marker Buoy
  • Exposure Suit adequate for the open water environment
  • 2 Cutting Devices
  • Underwater Slate

Fees Include

  • E-Learning
  • Certification

Student responsible for: *

  • All Required Equipment to include tanks
  • Gases to include Instructors
  • Any Dive fees, to include instructors

* Traveling to Honolulu or missing equipment? Discuss with your instructor.

Price: $899