TDI - Advanced Nitrox / Helitrox

Who this course is for:

• The certified Advanced Diver or Intro to Tech Diver looking to expand their knowledge of decompression theory and diving techniques using helitrox
• The certified Advanced Diver or Intro to Tech Diver who is interested in extending their bottom time
• The certified Advanced Diver or Intro to Tech Diver who has interest in moving forward with technical diving education

Course prerequisites:

• Minimum age 18
• Minimum certification of SDI Advanced Diver (with Deep specialty) or TDI Intro to Tech Diver, or equivalent
• Certified as TDI Advanced Nitrox Diver (unless being taught concurrently)
• Proof of 50 logged dives

What you can expect to learn:

• Decompression dive planning including:
  • Gas requirements
    • Oxygen limitations
    • Nitrogen limitations
    • Helium limitations
  • Decompression gas choices
  • Tables vs. personal dive computers
  • Emergency and contingency planning (equipment failure, omitted decompression, etc.)
• Helium as a breathing gas
  • Effects on narcosis
  • Effects on respiration
  • Effects as an insulator
  • Counter diffusion
  • HPNS
• Decompression diving procedures
  • Equipment selection
  • Pre-dive checks and drills
  • Stress analysis and mitigation
  • Following a decompression schedule
  • Gas switching
  • Team awareness and communication
  • SMB/lift bag deployment
• Proper trim, buoyancy and propulsion techniques
• Emergency procedures (equipment failures, catastrophic gas loss, omitted decompression, navigational errors, etc.)
• Equipment considerations, cylinder labeling, analyzing nitrox mixtures, and gas blending procedures

What’s in it for you?

• Ability to conduct decompression diving activities without direct supervision utilizing helium and/or nitrox mixtures provided:
  • The diving activities approximate those of training
  • The areas of activities approximate those of training
  • Environmental conditions approximate those of training
  • Breathing mixtures do not contain more than 35% helium or less than 21% oxygen
• Ability to enroll in TDI Extended Range, TDI Advanced Wreck, TDI Trimix courses

TDI Helitrox Diver minimum requirements:

• Satisfactorily complete the TDI Helitrox Diver Course written examination with a passing score of 80% followed by 100% remediation by the instructor
• Complete all open water requirements safely and efficiently
• Demonstrate mature, sound judgment concerning dive planning and execution