Extend Your Dive Time Underwater
As a scuba diver, we’re sure you have had so much fun on a dive that you have wanted to stay underwater longer but your dive computer is telling you to begin your ascent as you are close to your No Decompression Limits (NDL)?
Or having been on the dive boat after your first dive and you want to get back in the water, but your computer is telling you to wait?
If you can relate to both of these situations then you need to dive on Enriched Air Nitrox and extend the time you can spend underwater, and shorten the time you are spending on the surface between dives!
The PADI Enriched Air Diver course is a 1-day course that will certify you to dive on Enriched Air to a maximum of 40% Oxygen, extend your limits and extend your fun!

Included in Enriched Air Nitrox Course
- PADI Enriched Air Diver E-learning manual
- Dive Insurance
- Small Groups (4:1)
- 1-day schedule
- PADI Enriched Air Diver certification
- Full set of Aqualung rental equipment including a Dive Computer for your course
- Official Isla Tortuga Divers T-shirt
- Best Vibes!
What is an Enriched Air Nitrox Diver?
Enriched Air, also referred to as Nitrox or EANx, is a breathing gas that contains a higher percentage of oxygen and a lower percentage of nitrogen than when we dive on air.
Air is approximately 79% nitrogen and 21% oxygen whereas Nitrox breathing gases have an Oxygen content ranging from 22-40%.
The most popular Nitrox blends are 32% & 36% Oxygen.

What are the benefits of diving on Nitrox?
The primary reason we dive on Nitrox is it allows us to extend our bottom time compared to when diving on Air. The reason for this is it’s the Nitrogen in the air that we breathe that is responsible for decompression sickness (DCS). If we reduce the amount of Nitrogen you breathe, you can extend the time you stay underwater without increasing the chances of DCS.
Other benefits for diving on Nitrox include shorter surface intervals, again due to less Nitrogen being breathed and this being in our system. Many divers also report feeling less fatigued after Nitrox diving compared to how they felt after diving on air.
What you learn in a PADI Enriched Air Diver course
- The benefits of diving on Enriched Air
- Recommendations for using equipment with enriched air
- Air filling procedures, cylinder markings & analyzing Enriched Air
- Planning Enriched Air dives using a dive computer
- Oxygen partial pressures, maximum and contingency depth limits and the hazards of exceeding these limits
- Signs and symptoms of oxygen toxicity

Why Choose PADI Enriched Air Diver course?
Option 1:
Do the dives on Nitrox!
The course consists of 3 sections:
Knowledge Development
Complete the PADI Enriched Air e-learning manual, completing the knowledge review and the final exam.
Practical Assessments
How to use an oxygen analyzer to determine the oxygen content in an enriched air blend.
How to verify cylinder content data and sign the fill log.
Demonstrate the procedures for obtaining an enriched fill and renting an enriched air cylinder from an enriched air fill station.
Open Water training – 2 training dives
Use your dive computer to plan and execute two dives within the no stop limits establishing your maximum depth and oxygen exposure limits during pre-dive planning.

Option 2:
Don’t have time to do the dives?
Although it’s recommended that you conduct Enriched Air Dives 1 and 2 whenever possible, you do have the option to conduct pre-dive simulation exercises instead if you don’t have the time to complete the dives.
In this situation, this is what the course would entail:
Knowledge Development
Complete the PADI Enriched Air e-learning manual and complete the knowledge review and the final exam.
Practical Assessments
- Demonstrate pre-dive equipment setup, blend analysis, and label confirmation for two enriched air dives with two different scuba cylinders filled with enriched air.
- Demonstrate how to set an EANx compatible dive computer for two enriched air blends based on the analyzed content of the two cylinders.
- Demonstrate how to find the maximum depth for the EANx blend for the analyzed content of the two cylinders.
- Plan two enriched air computer dives based on depths, times, and gas supply provided by the diving instructor and the analyzed content of the two scuba cylinders filled with enriched air.
Option 3
Combine the Enriched Air Nitrox course with any PADI training course and do two of the training dives on Enriched Air Nitrox.
The PADI courses we offer this great deal on are:
Option 2 & 3 – 5900 THB
Prerequisites for PADI Enriched Air Diver course
To embark on this exciting adventure and further improve your skills as a diver, there are a series of requirements:
- Open Water Certification: Obviously, you need to be an Open Water diver and have dived relatively recently. If you need a refresher on your diving skills, we can do that too!
- Be in good health: As for every PADI course, you will have to complete a medical questionnaire to ensure that there are no contraindications with diving.
- Minimum age: You have to be at least 12 years old to be eligible to enroll in an Enriched Air Diver course.

PADI Enriched Air Diver course schedule
The PADI Enriched Air Diver course offers the most flexibility in terms of schedules; however, the most popular schedule is as follows:
Complete the PADI Enriched Air Diver e-Learning ahead of time.
- Meet your Diving Instructor to review the e-learning
- Complete the Practical Assessments 1 & 2
- Dive either on our morning boat @07:15 or afternoon boat @12:15
In less than 24 hours you will have completed the PADI Enriched Air Diver course and we will issue you with the prestigious PADI Enriched Air Diver certification.
This will allow you to dive anywhere in the world on Enriched Air Nitrox.
Why PADI for Enriched Air Diver?
PADI dive centers must adhere to the highest training standards and customer service levels in the dive industry.
PADI is the most recognized agency worldwide when it comes to recreational diving courses, with hundreds of agencies around the world; PADI is established in more countries than any other agency.
In short, if you go to a small island in the middle of the ocean and there is a diving school, it is most likely PADI.
PADI is the only training agency whose curriculum is written by educational authors, using tried, tested, and trusted learning philosophies adapted for scuba diving.
The PADI system is performance-based, not time-based.
What this means is you will have to earn your certification, and you can’t buy it!
Please keep in mind that we are going to ask you to do more than other dive centers and agencies. On the bright side, this will mean you will receive a higher quality training course and will be much better prepared as a certified scuba diver.
PADI is the only agency that conducts customer satisfaction surveys to ensure that its professionals are meeting the highest standards of education and safety, while other agencies only ask instructors or schools to manage their own standards.

Why Choose Isla Tortuga Divers for PADI Enriched Air Diver?
- We limit our class size to a maximum of 4 students per Instructor providing you with a personalized and focused training course on Koh Tao.
- Our dive boat MV Attawat is comfortable and spacious and as we own our own boat it gives us the flexibility to choose the dive sites that best suit you
- The knowledge development portion of the course can be completed using PADI eLearning program. What this means is once you have completed the registration process and paid your deposit you can get started straight away!
- Completing PADI’s e-learning ahead of time means no classroom on your PADI Enriched Air Diver course!
- We are a PADI 5 Star Instructor Development Center and as such all our instructors are trained in-house by our PADI Course Directors. This allows us to vet every staff member to ensure they are teaching to the very highest standards, providing you with a quality and safe experience ….and of course lots of fun!
- We provide you with a dive computer for all your open water training dives at no extra cost!
- We only teach ‘diving with dive computers ’on all our PADI courses in line with the latest technology and educational principles.
- As an ‘Aqualung Partner Center’ all our diving equipment passes the most rigorous quality and reliability tests.
- Last, but without a doubt, the most important reason to complete your PADI Enriched Air Diver course with Isla Tortuga Divers, is that we guarantee you will learn to dive with a smile and that you will be left wanting more!
Koh Tao is a great location to go fun diving and explore our range of PADI Specialty courses. With our expert diving instructors, PADI Divemasters, custom dive boat and quality dive equipment, Isla Tortuga Divers can meet the needs of all certified divers.
Contact us for fun dive pricing, our Air Conditioned Rooms or Shared Rooms and our daily dive site schedule.