TDI Advanced Nitrox Diver
The TDI Advanced Nitrox course at Dive Subculture Technical is designed for divers looking to enhance their skills with enriched air nitrox for more complex dives. Building on foundational knowledge, this course focuses on advanced dive planning, calculating maximum operating depths (MOD), and managing oxygen exposure.
Participants will learn to analyze gas mixtures, perform gas switches, and manage multiple cylinders safely. The course includes theoretical instruction, confined water training, and open water dives to reinforce essential skills.
The TDI Advanced Nitrox course at Dive Subculture Technical is an essential step for divers aiming to expand their capabilities with enriched air nitrox. This course not only enhances your understanding of advanced dive planning and gas management but also provides hands-on experience in analyzing gas mixtures and executing safe gas switches. Through a blend of theoretical instruction and practical training, you’ll gain the confidence to explore deeper dive sites, all while prioritizing safety. Completing this course sets the foundation for further specialized training, ensuring you are well-prepared for the challenges of technical diving.
TDI Advance Nitrox Diver FAQs
– The Certified nitrox diver looking to expand their understanding of nitrox mixtures containing more than 40% oxygen
– The Certified nitrox diver looking to expand their in-water skills
– The Certified diver who has interest in moving forward with technical diving education
– Minimum age 18, 15 with parental consent
– Minimum certification of TDI Nitrox Diver or equivalent
– Proof of 25 logged open water dives
Advanced Nitrox picks up where TDI Nitrox leaves off and offers a more in-depth look at diving with nitrox including:
– Physics and physiology relating to diving with gas mixes containing more than 40% oxygen
– Gas planning, dive tables, dive computers, oxygen limitations, nitrogen limitations
– Equipment considerations, cylinder labeling, analyzing nitrox mixtures, gas blending procedures, and oxygen service ratings for using gases with more than 40% oxygen
– Ability to dive using EAN 21 through 100 percent oxygen provided:
(a) The diving activities approximate those of training
(b) The areas of activities approximate those of training
(c) Environmental conditions approximate those of training
– Ability to enroll in TDI Decompression Procedures, TDI Semi-closed Rebreather courses, TDI Closed Circuit rebreather courses
– Satisfactorily complete the TDI Advanced Nitrox course and written examination
– Complete all open water requirements safely and efficiently
– Demonstrate mature, sound judgment concerning dive planning and execution
Course Duration - 3 Days
Academics 1 Day
Land Drills 1 Sessions
Open Water 4 Dives
Course Structure
Physics:
– Review key concepts of pressure in diving.
Physiology:
– Understand hypoxia and the effects of oxygen toxicity, including whole body and central nervous system (CNS) toxicity.
– Learn about nitrogen narcosis, nitrogen absorption and elimination, and the toxic effects of carbon dioxide and carbon monoxide.
Formula Work:
– Calculate optimal gas mixes and determine the maximum operating depth (MOD) for specific mixtures.
Equipment Considerations:
– Differentiate between equipment for mixtures with less than and more than 40% oxygen content.
Dive Tables:
– Utilize equivalent air depth concepts with dive tables and computer-generated tables.
Dive Computers:
– Understand the features of mix adjustable and oxygen-integrated dive computers.
Dive Planning:
– Plan dives with a focus on gas requirements and limitations regarding oxygen and nitrogen.
Common Mixing Procedures:
– Learn about different gas blending methods, including partial pressure blending, continuous blending, and membrane separation (demonstrated by the instructor).
Decompression:
– Explore the use of enriched air nitrox (EAN) as a decompression gas and the benefits of using oxygen for decompression, along with the advantages and disadvantages of multiple gas switches.
Nitrox Skills Review: Refresh knowledge and skills related to nitrox diving.
Oxygen Analyzer Use: Demonstrate correct operation of an oxygen analyzer, including optimal calibration procedures.
Pre-Dive Planning: Show proficiency in pre-dive planning, focusing on:
– Personal gas consumption limits.
– Oxygen exposure limits at planned depths with actual gas mixtures.
– Nitrogen absorption limits at planned depths with actual gas mixtures.
CNS Loading Calculation: Calculate and log Central Nervous System (CNS) loading for each dive, including cumulative exposure where applicable.
Gas Labeling Understanding: Demonstrate knowledge of gas labeling in accordance with local regulations and practices.
Oxygen Service Prep: Adhere to conventions for preparing equipment for oxygen (O₂) service.
Nitrox Computer Programming: Program a nitrox computer with the appropriate oxygen percentage if used.
Dive Execution: Properly execute the planned dive while adhering to all predetermined limits.
Pre-Dive Drills:
START Procedure: Implement the START checklist before every dive, which includes:
- S: S-drill (Out of Air drill and Bubble Check)
- T: Team (buddy equipment checks)
- A: Air (gas matching)
- R: Route (entry/exit and planned underwater path)
- T: Tables (depth, duration, waypoints, and schedule)
Stress Analysis: Conduct stress analysis and mitigation strategies.
In-Water Drills:
Buoyancy Control: Demonstrate the ability to hover at a fixed position in the water column without using hands or feet.
Team Awareness: Maintain good awareness of buddies and team members through effective communication, proximity, and teamwork.
Regulator Management: Manage a free flow from the primary regulator, perform a shutdown cycle, and switch to a backup regulator in a controlled manner.
Safety Stop: Conduct an appropriate safety stop while maintaining neutral buoyancy.
Air Sharing: Share air with a buddy as both the donor and recipient while maintaining position in the water column.
Body Positioning: Demonstrate correct body position and trim, maintaining a horizontal and streamlined posture while moving.
Stress Analysis: Perform proper stress analysis for yourself and your dive buddy.
Equipments Required (All Technical Courses)
- Primary and Secondary Regulators (Depends on Configuration)
- Technical Back-mount BCD (Wing & Bladder) or a Technical Sidemount Harness
- Primary Mask + Back Up Mask
- Wet Notes and/or Slates
- One Lift Bag and/or SMB
- Dive Computer and Timing Device/or Backup Computer
- Decompression Regulator(s)
- Reels and Spools
- Compass
- Torch and Back Up Torches
- Exposure Protection 3mm/5mm or Dry Suit
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