Qualifications of Graduates
Upon successful completion of this course, graduates may engage in decompression diving activities without direct supervision so long as:
1. The diving activities approximate those of training.
2. The areas of activities approximate those of training.
3. Environmental conditions approximate those of training.

Upon successful completion of this course, graduates are qualified to enroll in:
1. TDI Advanced Wreck Course.
2. TDI Entry Trimix Course.
3. TDI Advanced Trimix Course.

Student Pre-Requisites
The student must:
1. Be a minimum age of eighteen (18).
2. Be certified as a TDI Advanced Nitrox Diver and TDI Decompression Procedures Diver (or equivalents) is required.
3. Have a minimum of one hundred (100) logged dives, of which twenty (25) must be deeper than thirty (30) msw / one hundred (100) fsw.

Course Structure and Duration
Open Water Execution:
1. Six (6) dives with a minimum accumulated bottom time of one hundred (100) minutes.
2. All dives must be deeper than thirty (30) msw / one hundred (100) fsw with four (4) dives deeper than forty (40) msw / one hundred thirty (130) fsw.
3. No more than two (2) dives may be credited from previous training.
4. Only two (2) dives from Advanced Wreck course may be credited towards the total dives required.
Course Structure:

Required Equipment
The following are required for this course:
1. TDI Extended Range Diver Manual.
2. Recommended additional reading: Deep Diving; An Advanced Guide to Physiology, Procedures and Systems, Revised 2nd edition 1995, by Bret Gilliam

The following equipment is required for each student:
1. Bottom Mix Cylinder(s)
A. Cylinder volume appropriate for planned dive and student gas consumption.
B. Dual outlet valve, double manifold or independent doubles.
C. Labeled in accordance with TDI Standards.
2. Travel Mix Cylinder(s) if used
A. Cylinder volume appropriate for planned dive and student gas consumption.
B. Labeled in accordance with TDI Standards.
3. Decompression Mix Cylinder(s)
A. Cylinder volume appropriate for planned dive and student gas consumption.
B. Labeled in accordance with TDI Standards.
4. Regulator(s)
A. Primary and primary redundant required on all bottom mix cylinders.
B. Submersible pressure gauges are required on all primary / bottom mix cylinder(s).
C. A contingency use long hose second stage should be designated and appropriately rigged to facilitate air sharing at depth if necessary.
5. Buoyancy Compensator(s) adequate for equipment configuration.
6. Redundant Depth and Timing Devices.
7. Air decompression computers allowed for use as depth and timing devices.
8. Redundant Light System if needed for site conditions.
9. Jon-line and other rigging lines as dictated by site conditions.
10. Ascent Reel with Lift Bag/Surface Marker Buoy
A. Adequate for maximum planned depth.
B. Minimum of eleven (11) kg / twenty five (25) lb. lift bag/surface marker buoy.
11. Exposure Suit adequate for the open water environment.
12. Two (2) Line Cutting Devices.
13. Underwater Slate (for decompression/contingency tables).

Required Skill Performance And Graduation Requirements
The following open water skills must be completed by the student during open water dives: The maximum depth for this course is fifty five (55) msw /one hundred eighty (180) fsw.
1. Properly analyze all gas mixtures to be used.
2. Demonstrate adequate pre-dive planning
A. Limits base on personal and team gas consumption.
B. Limits based on oxygen exposures at planned depths for actual mixes.
C. Limits based on nitrogen absorption at planned depths for actual mixes.
3. Properly execute the planned dive within all pre-determined limits.
4. Demonstrate the proper procedures for switching and isolating a malfunctioning regulator. This skill is to be performed at a depth no deeper than forty (40) msw / one hundred thirty (130) fsw.
5. Demonstrate the proper navigational techniques for the specific dive.
6. On two (2) dives, demonstrate an ascent with ascent reel and lift bag and perform staged decompression.
7. On one (1) of the dives, tow a simulated unconscious diver, while at depth, nine (9) meter / thirty (30) feet to ascent line and simulate an emergency rescue ascent technique.

In order to complete this course, students must:
1. Satisfactorily complete the TDI Extended Range Course written examination.
2. Complete all open water requirements safely and efficiently.
3. Demonstrate mature and sound judgment concerning dive planning and execution.