More about this course

The TDI Advanced Nitrox Diver Course is a critical step for any diver preparing to enter the world of technical diving. Designed for certified divers looking to safely use enriched air nitrox from 40% to 100% oxygen, this course is ideal for divers involved in decompression diving, technical wreck penetration, or advanced dive missions.

You'll gain hands-on experience with:

• High-oxygen-content gas mixtures (up to 100% O₂)

• Decompression dive planning and execution

• Equipment configuration for technical environments

• Gas analysis, oxygen exposure tracking, and CNS/OTU management

• Proper use of stage cylinders and redundant systems

Often combined with the Decompression Procedures Course, Advanced Nitrox sets the foundation for more advanced technical certifications, such as Trimix or Extended Range. Training can be conducted in open water with standard backmount or sidemount configuration and focuses on gas management, safety, and execution under pressure.

Unlock longer bottom times, greater safety margins, and new diving frontiers with this essential course.

Who this course is for:

• 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

Course prerequisites

(these requirements must be met prior to the start of the course):

• Minimum age 18, 15 with parental consent
• Minimum certification of TDI Nitrox Diver or equivalent
• Proof of 25 logged open water dives

What you can expect to learn:

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

Some of the skills you will complete in this course include:

• Demonstrate buoyancy control; ability to hover at fixed position in water column without moving hands or feet
• Show good awareness of buddy and other team members through communication, proximity, and team oriented dive practices
• Demonstrate the ability to manage free flow from primary regulator in controlled fashion, shut down cycle, and switch to back up regulator
• Conduct appropriate safety stop while maintaining neutral buoyancy
• Demonstrate the ability to share air with buddy as both recipient and donor in a controlled manner while maintaining position in the water column
• Demonstrate correct body position; appropriate trim, such as horizontal/streamlined when moving forward
• Demonstrate proper stress analysis with self and dive buddy

What’s in it for you?

• Ability to dive using EAN 21 through 100 percent oxygen provided:
  • The diving activities approximate those of training
  • The areas of activities approximate those of training
  • Environmental conditions approximate those of training
• Ability to enroll in TDI Decompression Procedures, TDI Semi-closed Rebreather courses, TDI Closed Circuit rebreather courses

TDI Advanced Nitrox Diver minimum certification requirements:

• 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

At The Deep Ocean Explore Store, we understand that unforeseen circumstances can arise, but our primary goal is to maintain the highest standard of training and safety for all students. Please carefully review our cancellation policy, as it is designed to ensure a smooth experience for everyone.

Booking & Payments

Classes must be paid in full prior to enrollment or participation. Digital training materials, once issued, are non-refundable and non-transferable.

Cancellations

General Cancellations:

• Up to 7 days before class start date: 50% of class fee can be refunded.
• Less than 48 hours before class start date: 25% of class fee can be refunded at staff discretion.

Rescheduling:

• Up to 7 days before class start date: Subject to a 50% tuition rescheduling fee.
• Less than 48 hours before class start date: Subject to a 75% tuition rescheduling fee at staff discretion.

Medical and Illness Policy

If you are unable to participate due to illness, including COVID-19 or other general health concerns, you may reschedule with a 50% rebooking fee. A medical waiver is required to reschedule without penalty. Failure to provide a completed and signed medical waiver before the start date of class will result in a 50% rebooking fee or loss of tuition.

Missed Classes

If you miss any scheduled class, we will work with you to arrange makeup sessions, subject to availability:

• Classroom/Zoom Session: $100/hour
• Pool Session: $100/hour
• Ocean Dives: $375/day (private 1-on-1)

This policy ensures fairness to all students and maintains the quality of our diving programs. By booking a class with The Deep Ocean Explore Store, you agree to adhere to these terms. For questions or clarification, please contact us at instruction@doermarine.com