I. INTRODUCTION
This is the Instructor level certification course for Instructors wishing to teach the Draeger nitrox semi-closed circuit Rebreather course.

II. COURSE OBJECTIVES
The objective of this course is to train Instructors to teach recreational nitrox Rebreather diving, and to develop basic Rebreather diving skills appropriate to diving within the normal recreational depth limits for no-decompression diving.

III. QUALIFICATION OF GRADUATES
Upon successful completion of this course, graduates may teach the TDI Nitrox Semi-Closed Circuit Rebreather no-decompression course not to exceed the manufacturers designed depth maximum. This course is manufacturer specific.

IV. WHO MAY TEACH
Any active TDI SCR Rebreather Instructor Trainer may teach this course

V. INSTRUCTOR INSTRUCTOR TRAINER RATIO
A. Classroom
Unlimited so long as adequate facility, supplies and additional time are provided to ensure comprehensive and complete training
B. Open water
Six Instructor candidates per TDI Rebreather Instructor Trainer.

VI. INSTRUCTOR CANDIDATE PRE-REQUISITES
A. Minimum age 18
B. Minimum certification of TDI Rebreather Diver and TDI Nitrox Instructor (or equivalent)
C. Minimum of 10 SCR logged dives

VII. REQUIRED COURSE MINIMUMS
A. Classroom Hours - 6
B. Open water Dives -4

VIII. REQUIRED EQUIPMENT
The following equipment is required for each Instructor candidate
A. Semi-closed circuit Rebreather
B. Buoyancy compensator with power inflator
C. Depth gauge and automatic bottom timer and I or dive computer
D. Mask, fins
E. Exposure suit suitable for the diving environment
F. Knife
G. Slate and pencil
H. Bailout bottle with a minimum capacity of 13 cubic feet (except if using
the Ray)

IX. REQUIRED SUBJECT AREAS
The following topics must be covered during this course. Instructor Trainers must use the TDI Semi-Closed Circuit Rebreather Student, Instructor Guide, manufactures manual and the current TDI Standards & Procedures Instructor Manual, but may also use any additional text or materials that they feel help present these topics.
A. History of Rebreathers
B. Rebreather Physiology
1. Oxygen toxicity
2. Hyperoxia
3. Hypoxia
4. Asphyxia
5. Hypercapnia
6. Hypocapnia
7. Nitrogen management
C. Mechanics of a Rebreather
1. Scrubber canister
2. Scrubber materials
3. Scrubber endurance
4. Breathing bag
5. Mouthpiece and hoses
6. Exhaust valve
7. Inlet flow valve
D. Gas Consumption
1. Cylinder sizes
2. Flow rates
3. Depth and workload
4. Oxygen Percentages (for cylinder and breathing bag)
5. Using flow rate calculation
E. Problem Solving
1. Canister flooding
2. Mouthpiece loss
3. Scrubber exhaustion
4. Breathing bag rupture
5. Battery or censor loss
6. Open circuit bailout system
7. Post problem maintenance of equipment
F. Dive Computers
1. Mix adjustable
2. 02 integrated


X. REQUIRED OPEN WATER SKILLS
The following skills must be completed by the Instructor candidate (maximum
training depth shall not exceed the manufacturers design limit)
A. Demonstrate properly analysis of all gas mixtures to be used
B. Demonstrate a complete systems check and Rebreather configuration
C. Demonstrate adequate pre-dive planning
1. Limits based on personal gas consumption
2. Limits based on oxygen exposures at planned depth with actual mix
3. Limits based on nitrogen absorption at planned depth with actual mix
D. Properly execute the planned dive within all pre-determined limits
E. Demonstrate the proper procedures for
1. Buoyancy control
2. Bail-out
3. Mouthpiece removal
4. Ascent techniques
5. Safety stops
6. Buddy checks
7. Simulated emergency
F. Properly execute the break down and maintenance of Rebreather

XI. GRADUATION REQUIREMENTS
In order to complete this course, the Instructor candidate must:
A. Satisfactorily complete the TDI Semi-Closed Circuit Rebreather Course written examination and be able to adequately explain each answer to a prospective student
B. Demonstrate mature, sound judgment concerning training, dive planning and execution
C. Complete all open water requirements safely and efficiently
D. Demonstrate proficiency in teaching the TDI Semi-Closed Circuit Rebreather Diver Program
E. One graded presentation on a Semi-closed Circuit Rebreather topic

XII. SUPPORT MATERIALS
A. Instructor Registration
B. Semi-closed Circuit Rebreather Instructor Guide
C. Semi-closed Circuit Rebreather Diver Manual
D. TDI Standards & Procedures Instructor Manual
E. Rebreather PowerPoint Presentation Series