TDI Extended Range Instructor

TDI Extended Range Instructor 2018-06-27T19:11:20+08:00

Project Description

TDI Extended Range Instructor

This course provides the training and experience required to be certified to competently teach air dives to 55 meters / 180 feet that require staged decompression, utilizing nitrox mixtures or oxygen (O2) during decompression.

The objective of this course is to train instructors in the proper techniques, equipment requirements, and hazards of deep air diving to a maximum of 55 meters / 180 feet and utilizing nitrox mixtures or oxygen for staged decompression.

Academic topics

1. History of Deep Air Diving
2. Physics
a. Pressure review
b. Formulas for solving dive planning problems, maximum operating depth (MOD), best mix, etc
3. Physiology
a. Hypoxia
b. Oxygen (O2) toxicity
i. Whole body
ii. Central nervous system (CNS)
c. Nitrogen narcosis
d. Nitrogen absorption and elimination
e. Carbon dioxide (CO2) toxicity
f. Carbon monoxide (CO) toxicity
g. Hyperthermia
h. Hypothermia
4. Decompression Option
a. Air
b. Nitrox
c. Oxygen (O2)
5. Equipment Requirements
a. Twin cylinder or single cylinder options
b. Stage cylinder options
c. Regulator options
d. Harness / BCD options
e. Computer / depth gauge / bottom timer options
f. Ascent and navigation reels
g. Lift bags for drifting or free decompression
h. Lights
i. Redundant mask and knife
j. Jon-line or Garvin clips
6. Dive Tables
a. Introduction and review of different models, DCIEM, U.S. Navy recommended
b. Introduction to computer generated tables
7. Dive Computers
a. Mix adjustable
b. Oxygen (O2) integrated
8. Dive Planning
a. Operational planning
i. Support
ii. Teams
b. Team planning
i. Gas requirements
ii. Oxygen limitations
iii. Nitrogen limitations
c. Emergency planning
i. Omitted decompression
ii. Oxygen (O2) toxicity
iii. Decompression sickness
iv. General
9. Procedures
a. Bottom, travel and decompression gas
i. Normal operations
ii. Failure, loss or inadequate emergency procedures
iii. Analyzing and logging
b. Descent
i. Methods of entry, down-lines or free descent
ii. Recognizing narcosis
iii. Breathing
iv. Organization of equipment carried on diver
c. Ascent
i. Variable rates
ii. Trim and compensation
d. Support
e. Navigation
i. From shore
ii. From descent line
iii. From live aboard boat

The following skills must be completed by the instructor candidate. 

1. Properly analyze all gas mixtures to be used
2. Demonstrate adequate pre-dive planning limits based on:
a. Personal and team gas consumption
b. Oxygen exposures at planned depths for actual mixes
c. Nitrogen absorption at planned depth with actual mixes
3. Demonstrate the proper procedures for switching and isolating a malfunctioning regulator
4. Demonstrate the proper navigational techniques for the specific dive
5. On 1 dive, demonstrate an ascent with the ascent reel and bag or a Jersey up-line and perform staged decompression

  • Minimum age 21
  • Provide proof of 250 logged dives, 25 must be extended range dives
  • Certification as a TDI Extended Range Diver or equivalent
  • Certification as a TDI Advanced Nitrox and Staged Decompression Instructor or equivalent
  • Must have certified 10 students in advanced nitrox diver or decompression procedures diver, a minimum of 5 must be decompression procedures divers

The following materials are required TDI Standards and Procedures Manual, TDI Extended Range / Trimix Student Manual, TDI Extended Range / Trimix IG, TDI Extended Range / Trimix PowerPoint Presentation, Recommended text: Deep Diving: An Advanced Guide to Physiology, Procedures and Systems, Revised 2nd edition 1995 by Bret Gilliam with John Crea. We will provide you with additional non course related reading when you book your courses via our online classroom.

The course cost is 31,000 PHP, this includes dives and tuition. We can arrange rental equipment, however we highly recommend you use your own if at all possible. Not included is the instructor materials, or professional fee with TDI. Please ask us if you need assistance with these.

We have a limited number of twin bed fan dormitory rooms for 2500 PHP per person, per week. These come with a kitchenette and bathroom, simple backpacker style.

If you prefer something else we work with a number of local resorts and hotels, or you might like to check services like,  AirBNB we can help with local information if needed.

A typical hotel room starts from 1500 per night and up, the average would be around 2000 PHP. A typical self service monthly rental room or studio from 10,000 PHP and up, the average around 15000 PHP per month.

See here for more information on accommodation.

Contact the Course Director as early as possible, we can only accept a limited number of students on to each program, it is wise to book your preferred date in advance.

Please provide the following information when you book.

Total number of dives you have done
Number of dives you have done on Nitrox
What technical certifications do you hold
Number of decompression dives you have done
How long you have been diving
Any significant gaps in your diving
What equipment you will need



Lee Butler
Lee ButlerCourse Director, EFR IT & Tec IT
Lee has been a PADI Course Director and Instructor Trainer since 2012, conducting PADI IDC’s and Instructor programs with Savedra since.
Lee is a keen open and closed circuit technical and cave diver, and brings a wealth of diving knowledge and experience to each program.
In addition to being a Course Director he is also the General Manager of Savedra Dive Center, this puts him in a great position to help you get started with your new diving career.

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Contact Info

Savedra Dive Center, Moalboal, Cebu 6032

Phone: +63 32 474 3132

Mobile: +63 917 323 0369

Web: Go Pro Philippines

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