The decompression decompression procedure training is intended for two types of divers: the recreational diver who has no notion of decompression diving and who holds the advanced nitrox course and who wishes to develop his knowledge and learn new techniques, and the diver aspiring to technical diving.
This training TDI covers the theory for planning and executing decompression dives, and especially the practice for controlling the proper management of air supply and stabilization for safe decompression diving.
The deco procedure training is organized in 2 to 3 days for people who already hold the Advanced Nitrox Training.
The objective of this course is to train divers to plan and execute dives with decompression stops not exceeding 40 to 50 meters, unless the course is taught in combination with the course Extended Range (60 metres for extended range).
The theoretical portion covers the following topics:
Safety bearing vs. decompression stops
Physical
Pressure
Physiology
Bubble forming mechanism
Advantages of hyperoxic mixtures for decompression
Nitrogen absorption and removal
Carbon dioxide toxicity
Ascent / descent speed
Hyperthermia
Hypothermia
Psychological aspects (stress, panic, equipment, task management, time management)
Oxygen toxicity
Nitrogen narcosis
Carbon monoxide toxicity
Choice of mixtures for decompression
Air
Enriched air
Oxygen
Equipment
Single or twin cylinder and choice of valves
Choice of decompression cylinders
Choice of regulators
Harness vs. compensatory vest
Computer, depth gauge, stopwatch...
Reels and spools
Lifting bag/surface marker for drifting or decompression in open water
Jon-Line
Ballast and buoyancy during the dive and during decompression.
Diving tables vs. computers
Review of some models (Buhlmann, US Navy, ...)
Proper use of computers for multi-level and decompression diving (mixing, O2)
Dive Planning
Standard planning (gas volume, oxygen limitations, nitrogen limitations, third party rule, SAC, RMV)
Emergency planning (omission of decompression stops, decompression sickness, equipment failure)
Procedures
Main mixture and decompression mixtures
Downhill (input method, with reference, without reference, equipment)
Rise (variable speeds, position and trim)
Drift or stationary decompression (lift line, reel and reel and lifting bag/surface marker, decompression cylinder vs. boat supplied)
Support (shoreline, down line, platform, boat)
The practical part of the decoration and procedure training covers the following topics:
Pre-diving procedures
Review of previous course skills (Advanced Nitrox-TDI)
Selection and preparation of equipment adapted to a virtual ceiling environment
Practice team exercises (deployment of the lifting bag, change of mix)
Harmonization of mixtures within the team
Demonstrate basic ability with communication signals
Demonstrate proper pre-dive planning (personal and team consumption limits, dive plan and decompression schedule).
Stress factor analysis and mitigation
START (S-drill, Team, Air, Road, Tables)
Immersion maneuvering
Demonstrate buoyancy control (ability to be stable in the water without the use of hands and flippers)
Demonstrate a good awareness of their environment, their partner and other team members
Demonstrate ease of surface and underwater swimming with a decompression cylinder
Demonstrate the ability to remove and reattach the pressure relief cylinder while maintaining buoyancy control.
Ability to deploy a lifting bag solo and in a team
Lift with decompression stops on emergency line/lift bag
Remove and put on your mask
Deploying the spare mask
Appropriate reactions to gas leaks
Respond appropriately to a malfunction of the "direct system" (manual inflation)
Ability to confirm changes in immersion mixes with partner and team members
Sharing a decompression cylinder for at least one minute
Appropriate and controlled reaction to a continuous flow decompression valve
Appropriate modification of the decompression schedule (time and depth)
Towing of the tired diver on the surface and in immersion
Swimming in immersion while holding your breath
Execution of the dive plan according to the determined parameters (equipment, ascent and descent, decompression stops, proper monitoring of control instruments)
Sharing an immersed air source
Deployment of the emergency regulator in immersion (air failure in static and moving)
Make a 3-minute safety stop for any dive that does not require a decompression stop
Demonstrate proper management and deployment of gas mixtures (bottom, deco, travel) including conservative management, depth and buoyancy control and environmental awareness
Contingency situations according to the instructor (missed stop, extended bottom time, loss of line, loss of gas, loss of the lifting bag, poisoned diver, use of the Jon-line ...)