Advanced Nitrox Diver - Technical Divers

The TDI Advanced Nitrox course teaches divers how to choose appropriate gas mixes (EANx21-100% O2) to plan no decompression dives up 130 feet (40 meters). The benefits, hazards and proper procedures for utilizing EANx21-100% oxygen are considered.

This course is commonly taught in conjunction with the TDI Decompression Procedures course, forming the basis for those that wish to pursue a technical diving career.

Alternatively, TDI Advanced Nitrox is also a great course for those wanting to extend their bottom times for shallower depths.

The benefits of nitrox are well known to divers, who have been utilizing it for many years. The TDI Advanced Nitrox course teaches divers how to extend their knowledge of nitrox and move it to the next level. Up to this point in your diving career, you will have used just one breathing gas from start to finish on your dives, now you will learn how to take advantage of an alternate nitrox mix during your ascent.

Agencies we teach for:
Course Cost:
See Prices Page

This includes your TDI Advanced Nitrox study guide, your dive training, a certification card and photos (above and below water).

Other costs:
What not included is gear hire, gas fills, food, lodging, dive site fees & transportation. Dive site fees range from $15-$40, depending on site. We use nitrox and oxygen for the Advanced Nitrox Course, which costs more than air.

Gear you need to provide:

You will need to own your own scuba gear:

* Low volume mask and appropriate fins
* Alternate second stage (octo) attached to a primary regulator or a redundant scuba unit (13cuft minimum)
* Submersible pressure gauge
* Depth gauge and automatic bottom timer and/or dive computer
* BCD with power inflator
* Exposure suit adequate for the dive environment (dry suit preferred)
* Tanks and regulators properly labeled as required for EANx mixtures (backgas and a stage bottle).
Note: This course can be taught in single cylinder, doubles or sidemount configuration.
* Nitrox tables or computer planning software
* A small knife (recommended is a Z knife, to be arm or chest mounted).
* Slate or wetnotes with pencil

What the course entails:
The advanced nitrox course is an academic and water based course that adds to the students overall diving skills and knowledge, by introducing various technical diving methods and equipment.

How we teach it:
There are two parts, the academics and the wet portion.


The academics are done mostly at home from your TDI Advanced Nitrox Study Guide. This guide is very well structured, a very informative learning tool, and an excellent alternative to multiple day or evening lectures. Some topics covered are:

* Physics
* Physiology
* Formula work-best mix calculations, MOD
* Equipment considerations
* Dive tables and computer generated tables
* Dive computers-air, nitrox and multi gas computers
* Common mixing procedures

When you meet with your Instructor he/she will review the academics and you will complete a written test. You need to achieve at least 80% on your written test to pass. Detailed dive briefings and land drills will precede the diving.

Land Drills

* Review of Nitrox diving, benefits and hazards.
* Demonstrate correct use of oxygen analyzer including optimal procedure for calibration
* Demonstrate adequate pre-dive planning using limits based on personal gas consumption, oxygen exposures at planned depth with actual mix.
* Gas analyzing and labeling.
* How to perform safe gas switches

Wet Training

For the wet training, we typically do two days in the water (at least 4 dives), and a series of vital skills such as:

* Demonstrate buoyancy control (ability to hover at fixed position in water column without moving hands or feet)
* Gas management
* Show good awareness of buddy and other team members through communications, proximity and team oriented dive practices
* Demonstrate ability to manage a freeflow from a primary regulator in controlled fashion (shutdown drill), and switch to back-up regulator.
* Conduct appropriate safety stop while maintaining neutral buoyancy
* Demonstrate ability to share air with a buddy as both recipient and donor in a controlled manner while maintaining position in water column.
* Throughout all dives demonstrate mature, sound judgment concerning dive planning and execution.
* Properly execute the planned dive within all pre-determined limits.

Note: this is not a fully inclusive list, just an overview!

All dives will include a pre-dive briefing, START check, safety stop and post dive critique.

START is an acronym for pre dive checks as follows: S-Drill (OOA drill and Bubble Check), Team (buddy equipment checks), Air (gas matching), Route (entry/exit and planned path underwater), Tables (depth, duration, waypoints and schedule).

It should be noted that participation in the Advanced Nitrox class does not guarantee certification. Each student must do the required number of dives, all the skills, and demonstrate that they are comfortable with planning and executing safe dives utilizing EANx21-100% before they receive their certification card.

After successful completion of your academics and water work, you will awarded your certification as an Advanced Nitrox Diver.

Here at Dayo Scuba we also mentor our students (at no extra cost), so you can also gain additional experience in this type of diving with us after your have completed your course.

Age requirements:
You must be at least 15 years old to receive an Advanced Nitrox Diver certification, there is no maximum age.

Minimum number of students per class:
We need 2 or more people to make an Advanced Nitrox class; private, one-on-one classes can be organized for a separate fee.

Alternatively, Advanced Nitrox can be combined with ANY of our cavern and cave courses.

How many people are in each class?
Our Advanced Nitrox Diver classes range in size, from 1-3 students (3 is the maximum per instructor).

Schedule/Timing for the Advanced Nitrox Course:
We train all the time, and have multiple instructors on staff, many full time, so we do weekday and weekend classes.

Call us or check out our Calendar for dates of upcoming courses.

How long does the course take?
Usually we complete the wet portion of the Advanced Nitrox Course in 2 days, with at least four dives (100 minutes bottom time). Sometimes it is necessary to be in the water more than 2 days because of learning difficulties or weather issues. If necessary, you can come back, free of charge, and join in another Advanced Nitrox Course to finish your training. We will also train you for any extra days you may need to get you properly certified. It is our mission to make you a safe and competent diver.

Where we do our course:
We usually do our Advanced Nitrox Diver training here around Central Florida or in North Florida. We dive two different sites for the Advanced Nitrox course, day one is usually a basic site, and day two is more advanced site. Common choices for training are Blue Spring, Hudson Grotto, Forty Fathoms and the ocean. If you are cave trained/training, we have a lot more sites to choose from.

Prerequisites for Course:

* Advanced Open Water certification is required

* You must be Nitrox certified

* Minimum age: 15 years old.

* Minimum of 25 logged open water dives. The instructor has final approval on accepting anyone into the class even though they may show poof of twenty-five (25) logged open water dives.

* Before participating in the Advanced Nitrox diver course, you will be asked to fill out a standard liability release form and a medical statement. If you answer YES to anything on the medical form we will require that you get it signed off by a physician.

*Technical Diver Training - Dayo Scuba Orlando Florida is required for all technical dive courses.

* This class requires that all student divers already have good buoyancy skills. Do NOT take this class if you have none.

Standards for the Advanced Nitrox Course:

* Maximum depth for all Advanced Nitrox training diver will not exceed 130 feet/40 meters.

* No decompression diving

What you can do afterwards:

* Dive, dive, dive for longer!

* You will be a safer, more competent and comfortable diver after completion of your Advanced Nitrox course…..knowing you are a better diver, that now has the ability to multi-task while diving.

* The safe diving practices learned during your Advanced Nitrox course will apply to all types of diving you do in the future, including open water recreational diving.

* Continue your diver training with more specialized training, the TDI Decompression Procedures course is a common follow up to or combination with this course.

* The Advanced Nitrox course is the foundation for all technical courses.