with Hydronauts


Nitrox is a breathing gas with a higher concentration of oxygen than normal atmospheric air. Diving on Nitrox offers the benefit of staying at certain depths for a longer period of time. Nitrox decreases the amount of nitrogen absorbed by your body on a dive and decreases decompression time. 

Diving on Nitrox is especially advantageous when doing multiple dives in a day or short period of time. For example, many people take the Nitrox diving course ahead of diving on a liveaboard trip where four or five dives are offered each day. 

Diving on increased oxygen content presents its own physiological and logistical risks. Taking the Enriched Air Nitrox course teaches you about these risks and how to mitigate them. 

We recommend combining the Nitrox course in conjunction with Explorer 30, Advanced 35, Deep 40, and/or Sidemount courses.

This course can be conducted in two ways:

1. Theory only – 1 Day – 5,500 THB

2. Theory + 2 Open Water Dives – 2 Days – 8,000 THB



Must be 15 years of age or older.

Must be a certified Open Water diver. 

Have a minimum of 8 hours logged underwater in an Open Water environment.

If you’re not sure you meet these prerequisites or if you need to complete a prerequisite course, reach out to us! 

We’d love to help you and do our level best to respond to all enquiries within 12 hours.

Step 1 -
Online Study

Begin your e-learning before you arrive

Your training starts online where you will access all your RAID training manuals and quizzes. Contact us to get started with your e-learning!

Step 2 - Theory & Workshops

On arrival, you’ll meet your instructor who will review your pre-completed e-learning with you. Your instructor will conduct a Nitrox workshop and help you practice analyzing your tanks. 


Optional Step 3 - Open Water Dives

Now its time to put what you’ve learned online and with your instructor into use on a 1-day, 2 dive trip on Enriched Air Nitrox!

Why Choose Hydronauts?​

RAID Instructors​

Our experienced instructors are hand-picked, highly trained, and passionate about scuba diving. We tailor each course and dive to your unique needs.

Beachfront Diving Resort​

Southwestern-facing diving resort including a hotel, purpose-built training pool, restaurant, dive boat, and beach bar. We offer diving & accommodation packages for every budget.

Guaranteed Small Groups

We guarantee small groups of no more than four students to an instructor or dive guide so that you get the individual attention you deserve.

State-of-the-Art Equipment

We choose to dive and teach in Backplate & Wing BCD with a Long-hose, Short-hose regulator configuration favored by technical divers.

Dive Anywhere in the World

Upon completion of your RAID scuba diving course, you will be issued with an e-certification card that recognizes you as an internationally certified scuba diver.

Low Carbon Footprint

We make every effort to reduce our footprint and use of paper and plastic. All our course materials are hosted online giving you access for life.

Reserve your space now


You must wait 18 hours after your last dive before flying in an aircraft.

Need a place to stay? We’re a beachfront diving resort! We offer rooms from single-gender to mixed dorms, queen rooms, family rooms, and bungalows for weekly or monthly rent! You can book a room here

Please stay hydrated – drink lots of water before and after your dives.

Bring sunscreen (preferably reef safe!)


Have another questions? Reach out to us!

Yes! We are a 3-star beachfront resort! We have dorm rooms starting at 300 THB and private accommodation starting at 600 THB. Message us and ask about our diving and accommodation packages! 

Yes! You can begin your reading and quizzes before you get here but you’ll need to complete the workshops and exams with your instructor when you arrive. Contact us now to get started! 

Explorer 30 or Advanced 35 are the next courses we recommend after your Open Water 20 Course. These courses will get you to improve your buoyancy, advance your understanding of dive planning, and get you diving on shipwrecks, deep sites, and maybe even diving at night! Get in touch with us to learn more! 

Yes. All the answers are in the manuals for you to review anytime. Our approach to education is for students to comprehend and practice through repetition rather than focusing on textbook memorization. This ensures that your actions–underwater especially–are informed and contextual rather than rote and textbook. 

Yes! Check our Try Dive page or get in touch with us to learn more! We can’t wait to show you the underwater world and teach you to defy gravity!