Advanced Nitrox & Decompression Procedures (ANDP)
Ready to take your diving beyond the limits of recreational profiles? The TDI Advanced Nitrox & Decompression Procedures Courses package builds on the foundation of your technical diving journey. This combined program teaches you how to safely extend your bottom time using enriched air mixtures (up to 100% oxygen) and plan staged decompression dives. This is where the “real” tech diving begins.
You’ll learn to manage gas mixes, plan decompression stops, and use the proper equipment and procedures for dives beyond traditional no-decompression limits. With a maximum depth of 45 meters / 150 feet, this course prepares you to handle real-world decompression scenarios confidently and efficiently.
Whether you’re a technical diver in training, a scientific diver, or simply want to explore deeper for longer, this course will expand your skills, confidence, and underwater capability. Upon completion, you’ll be qualified to perform planned decompression dives and use advanced nitrox mixtures within your certification limits—setting the stage for further technical, trimix, or rebreather training.
What you can expect to learn
- Decompression dive planning including:
- Decompression gas choices
- Tables vs. personal dive computers
- Emergency and contingency planning (equipment failure, omitted decompression, etc.)
- 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
- Refining your proper trim, buoyancy and finning techniques
- Emergency procedures (equipment failures, catastrophic gas loss, omitted decompression, navigational errors, etc.)
- Equipment considerations, cylinder labeling, analyzing nitrox mixtures, and gas blending procedures
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 appropriate modifications to deco schedule in decompression emergency (over time, over depth) (to be simulated)
- 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
- Demonstrate ability to confirm gas switch(es) at depth with buddy/team members
- AND MUCH MORE!
Course Equipment Requirements
The following equipment is required for each student:
- Primary cylinder(s), cylinder volume appropriate for planned dive and student gas consumption
Note: Independent and isolated back-mounted doubles, are allowed to be used.
- Decompression mix cylinder(s)
- Cylinder volume appropriate for the planned dive and student gas consumption with submersible pressure gauge
- Labeled in accordance with TDI Standards
- Depth gauge and automatic bottom timer and / or dive computer
- Regulator(s)
- Primary and alternate 2nd stage required on all primary cylinders
- Submersible pressure gauges are required on all primary cylinders
Course Prerequisites
- Minimum age 18
- Minimum certification of SDI Advanced Adventure Diver, Advanced Diver, or equivalent
- DA requires a tech pass in GUE Fundies
- Proof of 25 logged open water dives
Over the last 20 years of teaching Decompression Procedures class, we have noticed an almost 100% consistent lack of preparedness of divers coming into this level. Most often, these divers were lacking in the fundamental diving skills, such as:
- Equipment configuration and use
- Trim and buoyancy
- Propulsion techniques including backwards kick
- Valve management
- Gas sharing
- SMB deployment
The Decompression Procedures class should be about how to plan for and execute Decompression dives, and how to refine and apply your diving fundamentals to planned decompression diving. Through teaching hundreds of students, we came to the conclusion that we needed to require more of the students coming into the Decompression level training so that we could spend the allotted time focusing on planned decompression specific techniques and procedures.
The GUE Fundies training has explicitly defined and objectively measurable standards. Requiring that our students enter the Decompression Procedures course with a GUE Fundies tech pass, was the most effective way to ensure that all students are diving and operating at a minimum level of proficiency and competency before beginning planned decompression diving.
What’s Included?
- Pre-course homework (eLearning) access codes (there is 1 for Adv Nitrox and 1 for Deco Procedures)
- Course tuition
- Registration and certification fees
What’ Not Included
- Travel to/from dive site(s)
- Dive site entry or boat fees
- Gas fills
- Rental equipment (if needed)
- Gratuity for instructor and/or support staff
- Remedial or additional instruction (if needed)
How much is the course?
$1599Take the Next Step
Want to know more?
Ask more questions or schedule any of these courses Email Us.