This course examines the use of EAN-21 through one hundred (100) percent oxygen for optimal mixes to a depth of forty (40) msw / one hundred thirty (130) fsw. The objective of this course is to train divers in the benefits, hazards and proper procedures for utilizing EAN-21 through one hundred (100) percent oxygen for dives not
requiring staged decompression. Decompression Procedures are combined with this course.
 

Student Pre-Requisites

The student must:
    1. Be a minimum age of fifteen (15).
    2. Have a minimum certification of TDI Nitrox Diver (or equivalent).
    3. Show poof of twenty-five (25) logged open water dives.
    4. If this course is taught in conjunction with the TDI Decompression Procedures Course, then the minimum age is eighteen (18).

Course Structure and Duration

Open Water Execution:
    1. Four (4) dives are required \with a minimum accumulated bottom time of one hundred (100) minutes.
    2. If Advanced Nitrox is taught in conjunction with Decompression Procedures only a total of six (6) dives are required with a            maximum depth of forty five (45) meters.
    3. Only two (2) dives from Advanced Wreck course may be credited towards the total dives required.

The following equipment is required for each student:
    1. Alternative second stage octopus attached to a primary regulator or a redundant scuba unit (three hundred and seventy (370) liter / thirteen (13) Cu. ft. minimum).
    2. A submersible pressure gauge.
    3. Depth gauge and automatic bottom timer and/or dive computer.
    4. Buoyancy Compensator with power inflator.
    5. Exposure suit adequate for the open water environment.
    6. Cylinder and Regulator properly labeled and cleaned as required for EAN mixtures.
   
Required Subject Areas
 

The TDI Advanced Nitrox Manual is mandatory for use during this course but instructors may use any additional text or materials that they feel help present these topics. The following topics must be covered during this course:
    1. Physics
        A. Pressure review.
    2. Physiology
        A. Hypoxia.
        B. Oxygen Toxicity
            I. Whole body (OTU’s).
            II. Central Nervous System (CNS).
        C. Nitrogen Narcosis.
        D. Nitrogen Absorption and Elimination.
        E. Carbon Dioxide Toxicity.
        F. Carbon Monoxide Toxicity.
    3. Formula Work
        A. Best mix computations.
        B. Maximum Operating Depth of mixture computations.
    4. Equipment Considerations
        A. Up to forty (40) percent oxygen content.
        B. Above forty (40) percent oxygen content.
    5. Dive Tables
        A. Equivalent air depth with any table.
        B. Computer generated tables.
    6. Dive Computers
        A. Mix adjustable.
        B. 02 integrated.
    7.Dive Planning
        A. Operation Planning
            I. Gas requirements.
            II. Oxygen limitations.
            III. Nitrogen limitations.
    8. Common Mixing Procedures (demonstrate one method)
        A. Partial pressure blending.
        B. Continuous blending.
        C. Membrane separation system.
    9. Decompression
        A. EAN usage as a decompression gas i.e. 50/50, 80/20 etc.
        B. Oxygen for decompression.
        C. Advantages / disadvantages of multiple gas switches.
 

Required Skill Performance and Graduation Requirements

Maximum training depths shall not exceed forty (40) msw / one hundred thirty (130) fsw. The following open water skills must be completed by the student during all open water dives:
    1. Properly analyze gas mixtures.
    2. Demonstrate adequate pre-dive planning
        A. Limits based on personal gas consumption.
        B. Limits based on oxygen exposures at planned depth with actual mix.
        C. Limits based on nitrogen absorption at planned depth with actual mix.
    3. Properly execute the planned dive within all pre-determined limits.
 

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

This course examines the theory, methods and procedures of planned stage decompression diving.  The objective of this course is to train divers how to plan and conduct a standard staged decompression dive not exceeding a maximum depth of forty five (45). The most common equipment requirements, gear set-up, and decompression techniques are presented. Students are permitted to utilize Enriched Air Nitrox mixes or oxygen for decompression provided the gas mix is within their current certification level.

Student Pre-Requisites
 

The student must:
    1. Be a minimum age of eighteen (18).
    2. Have a minimum certification of Open Water Diver.
    3. Show proof of twenty five (25) logged open water dives.

Course Structure and Duration

Open Water Execution:
    1. Four (4) dives are required.
    2. If Advanced Nitrox is taught in conjunction with Decompression Procedures only a total of six (6) dives are required.
    3. Only two (2) dives from Advanced Wreck course may be credited towards the total dives required.

The following equipment is required for each student:
    1. Primary Cylinder(s). Cylinder volume appropriate for planned dive and student gas consumption.
    2. Decompression Mix Cylinder(s)
        A. Cylinder volume appropriate for the planned dive and student gas consumption with submersible pressure gauge.
        B. Labeled in accordance with TDI Standards.
    3. Depth gauge and automatic bottom timer and I or dive computer.
    4. Regulator(s)
        A. Primary and alternate 2nd stage required on all primary cylinders.
        B. Submersible pressure gauges are required on all primary cylinders.
    5. Buoyancy Compensator(s) adequate for equipment configuration.
    6. Jon-line and other rigging lines as dictated by site conditions.
    7. 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.
    8. Oxygen Analyzer (may be supplied by the Instructor).
    9. Exposure Suit adequate for the open water environment.
    10. Underwater Slate.

Required Subject Areas

The TDI Decompression Procedures Manual is mandatory for use during this course but instructors may use any additional text or materials that they feel help present these topics. The following topics must be covered during this course:
    1. Overview of decompression “safety stops” compared to required stops.
    2. Physics
        A. Pressure review.
    3. Physiology
        A. Mechanics of bubble formation.
        B. Advantages of hyperoxic mixes for decompression.
        C. Nitrogen Absorption and Elimination.
        D. Carbon Dioxide Toxicity.
        E. Ascent / Descent rates.
        F. Hyperthermia.
        G. Hypothermia.
        H. Psychological aspects
        I. Task loading.
            II. Stress.
            III. Panic.
            IV. Time Management.
            V. Equipment.
    4. Decompression Options
        A. Air.
        B. Nitrox.
        C. Oxygen.
    5. Equipment Considerations
        A. Twin cylinder or single cylinder option, valve options.
        B. Stage cylinder options.
        C. Regulator Options.
        D. Harness / BC options.
        E. Computer, depth gauge, bottom timer options.
        F. Ascent and navigation reels.
        G. Lift bags/surface marker buoys for drifting or free decompression.
        H. Jon-line or Garvin clips.
        I. Proper weighting and buoyancy control during dive phase and decompression.
    6. Dive Tables vs. Computers
        A. Introduction and review of different models (Buhlmann, DCIEM, US Navy, etc).
        B. Proper use of electronic multi-level dive computers for dive planning and decompression
            I. Mix adjustable.
            II. 02 integrated.
    7. Dive Planning
        A. Standard Operation
            I. Gas requirements.
            II. Oxygen limitations.
            III. Nitrogen limitations.
        B. Emergency planning
            I. Omitted decompression.
            II. Decompression sickness.
            III. Equipment failure.
    8. Procedures
        A. Primary and Decompression Gas
            I. Normal operations.
            II. Failure, loss or inadequate emergency procedures.
            III. Analysis and logging.
            IV. Safeguards on decompression supply regulators.
            V. Rigging and deployment of decompression gear.
        B. Descent
            I. Methods of entry, down lines or free decent.
            II. Organization of equipment carried on diver.
        C. Ascent
            I. Variable rates.
            II. Trim and compensation.
        D. Fixed or Drifting Decompression Methods
            I. Up-lines fixed to bottom.
            II. Reels and lift bags/surface marker buoys.
            III. Free drifting stages or boat supplied.
            IV. Self-contained versus surface supply / rendezvous gas cylinders.
        E. Support
            I. From shore.
            II. From descent line or fixed platform.
            III. From live-aboard boat.

Required Skill Performance And Graduation Requirements

The following open water skills must be completed by the student during open water dives:
    1. Demonstrate adequate pre-dive planning
        A. Limits based on personal and team gas consumption.
        B. Exact dive and decompression profile.
    2. Properly execute the planned dive within all pre-determined limits
        A. Assembly of diver carried equipment.
        B. Proper descent / ascent rates.
        C. Proper staged stop procedures.
        D. Monitoring of decompression status equipment (tables, computers, equipment).
    3. Contingency Situations and Problem Solving (as appropriate by instructor)
        A. Omitted decompression.
        B. Extended bottom time profiles with increased decompression and re-calculated schedules.
        C. Failure to deploy lift bag and reel.
        D. Missed up-line or missed boat anchor.
        E. Loss of decompression gas.
    4. A safety stop of at least three (3) minutes shall be conducted on all No-Decompression dives and proper staged decompression stops whenever and wherever mandated.
    5. Demonstrate the correct deployment of a lift bag using a dive reel and / or up-line.
    6. Demonstrate (simulated) emergency gas sharing at a stationary depth not to exceed thirty (30) msw.
    7. Demonstrate emergency deployment of a backup regulator or bail-out scuba system containing bottom mix at a depth not exceeding thirty (30) msw.
    8. Demonstrate the proper deployment, management and use of the bottom mix, decompression mix and travel mix (if used), including but not limited to:
        A. Conservative gas management.
        B. Depth control to avoid descending too deep for mix.
        C. Show appropriate and timely responses to instruction / signals from the instructor and demonstrate buoyancy control and awareness throughout the dive.

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

Follow this link for our TDI Dive Course Costs. Included in your fee is the following :-

* Comprehensive theory and practical instruction
* TDI Advanced EANx & Decompression Procedures Manuals
* 6 x Open Water Training Dives
* TDI International Certification
* TDI Advanced EANx & Decompression Procedures Wall Certificate
* TDI Advanced EANx & Decompression Procedures Certification Card
* TDI Diving Tables

Does not include

* EANx fills during course dives for both students and instructor

Click to find out when the next course will begin

Heidelberg on 03 9459 4111 or email : paul@melbournediving.com.au

Ringwood on 03 9879 2868 or email : info@diverinstructionservices.com.au

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