Open Water 20

with Hydronauts

DEFY GRAVITY

Ready to receive your international scuba diving certification and scuba diving license? 

The best way to learn to dive on Koh Tao is the RAID Open Water 20 Course with Hydronauts! Koh Tao’s warm, tropical waters make it the premier location to learn how to scuba dive. 

With over 25 local sites you can discover coral gardens, shipwrecks, underwater pinnacles, and artificial conservation reefs. Scuba diving in the Gulf of Thailand is known for being consistently calm, with clear waters and ideal conditions for a relaxed and scenic experience.

No previous experience is required to participate in the 3.5-day open water diving course. You’ll learn everything you need to know to explore the underwater world. 

 11,000 THB

Requirements

Minimum 12 years of age for the Open Water 20 diving course.

Must be able to float in a pool for 10 minutes unassisted.

Must be able to swim 200 meters with no swim aids or be able to swim 300 meters using a mask, fins & snorkel.

Must be medically fit to scuba dive.

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

EXTRA INFORMATION

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!)


FAQ​

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!