This course provides training and experience required to competently utilize air for dives up to 180 fsw / 55 msw that require 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 / 55msw and utilizing nitrox mixtures of oxygen for staged decompression.

Pre-requisites:

q      Minimum age of 18.

q      Minimum of 100 logged dives, of which 25 must be deeper than

100 fsw / 30 msw, or the equivalent at the discretion of the instructor.

q      Certification as a TDI Advanced Nitrox Diver and TDI Decompression Procedures Diver (or equivalents) are required.

Qualifications of Graduates:

q      Upon successful completion of this course, graduates may engage in technical extended range diving activities without direct supervision.

q      Upon successful completion of this course, graduates are qualified to enroll in:

1.     TDI Advanced Wreck Course

2.     TDI Entry Trimix Gas Course

3.     TDI Advanced Trimix Gas course

Required Equipment:

q      Bottom Mix Cylinders

q      Travel Mix Cylinders

q      Decompression Mix Cylinders

q      Suit inflation cylinder (drysuit divers only)

q      Regulators

q      Buoyancy Compensators adequate for equipment configuration

q      Redundant Depth and Timing Devices

q      Redundant Light system

q      Jon line and other rigging lines as dictated by site conditions

q      Ascent reel with lift bag/surface marker buoy (2 each /50 lb min)

q      Exposure suit adequate for the open water environment

q      Line cutting device (3)

q      Back up mask

q      Underwater slate