What is enriched air nitrox and why use it for scuba diving?

Enriched air nitrox is a breathing gas with a higher oxygen percentage than regular air (typically 32% or 36% oxygen versus 21% in normal air). The higher oxygen content means less nitrogen in each breath, which slows your body's nitrogen absorption and extends the time you can stay underwater before hitting no-decompression limits. On coral reefs like Havelock's, nitrox can add 10–20 minutes of extra bottom time per dive.

How long does the RAID Nitrox course take?

The RAID Enriched Air Nitrox course is completed in a single day at Frogman Adventures. It includes e-learning theory, an in-person oxygen analyser workshop, dive computer nitrox configuration, and the practical skill of analysing and labelling a nitrox cylinder. No underwater dives are required for this certification.

What are the prerequisites for the RAID Nitrox certification?

You need any Open Water certification from a recognised agency (RAID, SSI, NAUI, or similar) and to be at least 15 years old. You do not need to be a regular or experienced diver — the Nitrox course can be taken immediately after your Open Water certification.

Can I use my Nitrox certification at any dive centre?

Yes. The RAID Enriched Air Nitrox certification is ISO-certified and accepted at dive centres worldwide. Once certified, you can request nitrox fills from any facility that supplies it, which includes most dedicated dive centres in Andaman, Southeast Asia, the Red Sea, and the Caribbean.

Nitrox Enriched Air Diver Course in Andaman - diver with nitrox tank checking dive computer at Havelock Island

Diver hanging still in blue water, Nitrox course in Havelock, Andaman

Diver in blue water with fins out, Nitrox course in Havelock, Andaman

Diver adjusting the mask close to the camera, Nitrox course in Havelock, Andaman

Clownfish in an anemone with a diver behind, Nitrox course in Havelock, Andaman

Two divers above the reef, Nitrox course in Havelock, Andaman

Diver swimming with the tank above the reef, Nitrox course in Havelock, Andaman

Diver upright above the reef, Nitrox course in Havelock, Andaman

Person sitting at the back of the dive boat in morning light, Nitrox course in Havelock, Andaman

Two people in wetsuits standing on the dive boat, Nitrox course in Havelock, Andaman

Diver swimming above the reef, Nitrox course in Havelock, Andaman

Course Code: FRG-NITROX-HVL

Nitrox Certification – Enriched Air Diver Course in Andaman

₹10,000 per person, inclusive of GST

4.9 2,023 Google reviews

Dive longer with the RAID Nitrox course in Havelock, Andaman. Learn to use enriched air nitrox to reduce nitrogen absorption and extend your bottom time on Havelock's coral reefs. Completed in one day.

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+₹2,000/day

Dive Computer Rental

Track depth, time & NDL in real time

+₹500/day

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Things to Know

RAID e-learning access activated within 2 hours of booking

Cancel 15+ days before: full refund of what you paid (minus 5% fee + GST). 7 to 14 days before: 50% back. Less than 7 days: no refund

No refunds for bookings between 15 Dec and 15 Jan

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About the Nitrox Enriched Air Diver Course

Nitrox is the most popular specialty certification in recreational diving for a simple reason: swap the air in your tank for enriched air (32–36% oxygen instead of 21%) and your no-decompression limits get meaningfully longer at recreational depths.

At 18 metres on standard air you have a no-decompression limit of around 56 minutes. On 32% nitrox that extends to over 90 minutes. At Havelock's best reef sites — Nemo Reef, Lighthouse, Turtle Bay — that extra time is the difference between a rushed look and a proper, relaxed exploration.

This is a 1-day specialty course. The morning covers the essential theory and hands-on gas analyser workshop; the afternoon is optional nitrox dives to put it all into practice. You leave with a globally recognised RAID Nitrox certification and the ability to use nitrox tanks at any dive centre worldwide.

Duration

1 Day

Bottom Time Gain

Up to 60% More

Nitrox Mix

32–36% Oxygen

Includes

Analyser Workshop

Certification

RAID Nitrox, ISO-Certified

Location

Havelock Island, Andaman

What's Included

One fee covers the full theory session, hands-on analyser workshop, dive computer setup training, and your RAID Nitrox digital certification. Optional nitrox dives can be added on the day.

Included in the Price

RAID Enriched Air Nitrox certification & ISO digital e-card
Lifetime access to RAID e-learning platform
Hands-on oxygen analyser workshop with instructor
Dive computer nitrox configuration training
RAID digital logbook entry
Small-group instruction by our RAID certified instructors

Optional Add-on

Nitrox tank fills for practical dives (additional charge applies)
Combine with a fun dive or your ongoing course dives on nitrox

What You Will Learn

Oxygen physics — why oxygen behaves differently under pressure
No-decompression limits — how nitrox extends your NDL at depth
Maximum Operating Depth (MOD) — calculate your safe depth limit for any mix
Oxygen toxicity — recognise risks, prevent CNS oxygen toxicity
Equivalent Air Depth (EAD) — plan dives using nitrox tables
Tank analysis — use an oxygen analyser to verify your gas mix before every dive
Tank labelling — correctly mark and document your nitrox cylinder
Dive computer setup — configure your computer for nitrox dives

After Certification

Request nitrox fills at any dive centre worldwide
Extend your bottom time on all future recreational dives
Reduce residual nitrogen for multi-day dive trips
Compatible with all major agencies — RAID, SSI nitrox certs are universally recognised

Who Can Join?

The Nitrox course is open to any certified diver. It's one of the quickest, most practical specialty certifications you can add to your diving portfolio.

Open Water Certified

Any Open Water certification from any recognised agency (RAID, SSI, NAUI, CMAS, etc.) is the only diving prerequisite. You don't need Advanced certification — Open Water is sufficient.

Minimum Age: 15 Years

Participants must be at least 15 years old. All under-18s require parental consent. There is no upper age limit — nitrox is actually particularly popular with older divers due to the reduced nitrogen loading and faster surface interval recovery.

Complete E-Learning First

RAID's nitrox e-learning is short — typically 1–2 hours online. We strongly recommend completing it before your course day so the morning workshop focuses on practical application rather than reading. Ask us to set up your RAID account when you book.

Combine With Any Course

Nitrox can be taken alongside any other course at Frogman. Doing your Advanced 35 dives on nitrox? Add the Nitrox cert first. Planning a multi-day fun dive trip on Havelock? Add Nitrox the day before and use enriched air for every dive.

No Medical Requirements Beyond OW

No additional medical declaration is needed beyond what you completed for your Open Water certification. If your health status has changed significantly since you were certified, a standard dive medical check is recommended.

Dive Computer Recommended

To get the most from nitrox diving, a personal dive computer that supports nitrox mode is ideal — it handles all the MOD and NDL calculations automatically. We provide dive computers during the course. If you're considering buying your own, we offer student discounts on gear purchases.

Your Course Day

The Nitrox course is structured as a focused half-day of theory and practical workshop, with the afternoon free for nitrox dives if you want to immediately put your new cert to use.

Before You Arrive

E-Learning (1–2 Hours Online)

Complete the RAID Nitrox e-learning modules on your phone or laptop before your course day. Covers oxygen physics, MOD calculations, NDL extension tables, and oxygen toxicity risks. Takes 1–2 hours and means the morning workshop goes straight to practical application.

Morning – Session 1

Theory Review & MOD Calculations

Knowledge review with your instructor — oxygen physics, why nitrox extends bottom time, how to calculate Maximum Operating Depth for any gas mix, and the signs and prevention of CNS oxygen toxicity. Quick and focused — about 45–60 minutes if you've done the e-learning beforehand.

Morning – Session 2

Analyser Workshop & Computer Setup

Hands-on with the oxygen analyser — connect it to a tank, purge the sensor, read the percentage, calculate the MOD, and correctly label the cylinder. Then dive computer setup: how to enter your nitrox mix percentage and set the PO₂ alarm threshold. These two practical skills are what make a nitrox diver safe and self-sufficient.

Afternoon (Optional)

Nitrox Dives at Havelock

Put your certification to immediate use. Nitrox tank fills are available (additional charge) for afternoon dives at Nemo Reef, Lighthouse, or Turtle Bay. Dive your favourite site with extended bottom time and notice the difference. Your instructor will buddy you through the first nitrox dive if you want additional confidence before diving independently.

Frequently Asked Questions

No — it's the opposite. Nitrox actually restricts your maximum depth due to oxygen toxicity limits. On 32% nitrox your Maximum Operating Depth is 34 metres; on 36% it's 28 metres. The benefit of nitrox is extended bottom time at recreational depths (12–25m), not greater depth. If deeper diving is your goal, the RAID Advanced 35 is the course to book.

At 18 metres, standard air gives you a no-decompression limit (NDL) of around 56 minutes. On 32% nitrox that extends to approximately 95 minutes — nearly double. At 20 metres: air gives ~45 minutes, nitrox gives ~80 minutes. The shallower the dive, the greater the benefit. On Havelock's best reef sites at 12–20 metres, nitrox makes a real, noticeable difference to your dive time.

Oxygen is only dangerous at elevated partial pressures — which only occur below your Maximum Operating Depth. When you stay above your MOD (which the course teaches you to calculate and your dive computer enforces automatically), oxygen toxicity risk is effectively zero. The course exists precisely to teach you this — it's a simple calculation and the course takes the mystery out of it completely.

Yes — nitrox certification from any major agency is accepted at all dive centres that offer nitrox fills. RAID, SSI nitrox cards are interchangeable in practice. Dive centres will ask to see your nitrox cert before filling enriched air tanks; any recognised card satisfies this requirement worldwide.

Yes — and many students do. Adding nitrox to your Open Water or Advanced course lets you complete your certification dives on enriched air, getting more bottom time on your training dives and leaving with two certifications instead of one. Contact us before booking and we'll schedule the nitrox theory on your first day so you can dive nitrox from Day 2.

A nitrox-capable dive computer is strongly recommended for regular nitrox diving — it automatically tracks your oxygen exposure and warns you if you approach MOD. We provide dive computers during the course. If you plan to use nitrox regularly on future trips, investing in your own nitrox computer is worthwhile. We offer student discounts on gear at Frogman.

The listed price of ₹10,000 is inclusive of GST, so the amount you see is the amount you pay. Your invoice shows the GST breakdown.

What Our Divers Say

4.9

★★★★★

2,023 Google Reviews

5★

4★

3★

2★

1★

Rajan Pillai

February 2025

★★★★★

Added the nitrox cert before my fun dive week at Havelock and the difference was immediately obvious. My buddy on air was calling the dive at 45 minutes while I still had plenty of NDL left on my computer. Half-day course, instant benefit on every dive after. Should have done it years ago.

Gayatri Iyer

January 2025

★★★★★

I was nervous about oxygen toxicity before the course — it sounds terrifying on paper. The instructor explained it so clearly that by the end of the morning I wondered why I'd ever been worried. Stick above your MOD, which your computer handles automatically, and there's nothing to worry about. Great course, great team.

Manoj Verma

March 2025

★★★★★

Did nitrox alongside my Advanced 35 at Frogman — completed the theory on Day 1 and all my Advanced dives were on enriched air. The extended NDLs meant we could spend more time on the deep skills without rushing the ascent. Highly recommend combining the two if you're planning an Advanced course anyway.

Ishaan Kapoor

December 2024

★★★★★

The analyser workshop alone is worth the course fee — knowing how to verify your own gas mix before every dive is a skill every diver should have. The theory is short and the practical is hands-on. Half a day and you leave with a qualification that benefits every future dive you ever make.

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2,023 reviews

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sonali kumaritoday

Must try .. awesome experience.. supportive staff .. thnku
Shailesh Dyesterday

Our visit to Havelock (Govind nagar Beach) with Frogman for scuba diving and snorkeling was an absolutely amazing experience. Everything was organized very well by Mr. Suchit Sir, who was present throughout the entire experience and made sure we were comfortable and safe at all times.
The team was extremely professional, supportive, and friendly. Safety was clearly their top priority, which made the whole experience even more enjoyable. Underwater, we saw beautiful corals and a wide variety of colorful fish in the deep sea it was truly a different and unforgettable world.
I sincerely thank the entire Frogman team and everyone who supported us during the activity. I would highly recommend Frogman to anyone visiting for scuba diving or snorkeling. Keep up the great work, guys!
Thank you, Frogman 🐸🐸🐸🐸🐸!
Shraddha Rathodyesterday

It was an amazing experience for us.All the instructors and divers were patient teachers. They took us to exact spots where we got to see many corals and fishes.🥳
Dhruvi Rathodyesterday

It's very wonderful. They show a different world that exists under our water in Havelock with Frogman. The staff is very experienced and helpful. Great time.
Prashant Kumar2 days ago

For Professional and cool scuba experience , these guys are awesome :)
Ranjani H G Vakoda2 days ago

We took early morning slot and the view was too good. Divers Bhaskar and Neelkanta took us for scuba diving in Andaman with Frogman. It was definitely a beginner friendly diving experience. Had an amazing time.
Sreya Ann Pius3 days ago

I’ve been scuba diving three times, and this was my second dive with Frogman. Once again, it was an amazing experience! Everything was absolutely worth every penny, and I couldn’t have asked for a better diving experience. Highly recommend Frogman to anyone looking to explore the underwater world. Definitely an experience worth having!
Jyoti Sharma3 days ago

best experience
Shishupal Tayade3 days ago

Nice place for scuba diving. Instructor is very nice. Nice trained persons..My experience is very nice. I will try again to come such a nice place.
Raj Mangal3 days ago

This is such a nice place for scuba diving and other under water activities. Staffs are very comparative and very helpful.
Thanks a lot of all frogman teams.
Rahul Arya3 days ago

I highly recommend scuba diving in Havelock Island with Frogman. The trainers are well trained and handled everything well if you have any kind of fear.
Anagha Nadig4 days ago

It was a first time experience for me and I don’t know to swim the whole process was so easy and simple. It was so wonderful to see the marine life. Instructors were really good. Nilkan and Dinesh were highly experienced.

      EXCELLENT  
   Based on 52 reviews 
    
 
 
 
   
 
 
       Posted on Tripadvisor  
   
   Getaway37242087056 
 
 
 
 Verified Great experience!
It was a great experience! I’m scared of water but Neelkanth and James made sure we had a seamless and memorable time.
  
 
      Posted on Tripadvisor  
   
   Vaibhav B 
 
 
 
 Verified Excellent Experience
It was an excellent experience. The trainers were very good.
  
 
      Posted on Tripadvisor  
   
   Coastal03225447858 
 
 
 
 Verified Lighthouse scuba diving experience
It was a great experience. Instructors were patient enough to explain everything thoroughly. The divers also made us feel comfortable underwater and kept checking on us to see if all was okay. They showed beautiful scenic views. We enjoyed it very much. Would definitely recommend to others.
  
 
      Posted on Tripadvisor  
   
   tiredofwhat 
 
 
 
 Verified Happy about the decision to do scuba with Frogman
What an experience! We as a family enjoyed every bit of this activity. We did the lighthouse scuba dive. Never had the experience this close with the variety of fishes and corels. Must do while in Havelock and frogman makes scuba diving comfortable and relaxing. Founder Suchit is very professional and the instructors and divers are also very professional. They all know their responsibilities and passion. Neelkant, Ketan, Rubin and other divers were very patient and explained everything (does and don't) underwater. The team really makes u comfortable and tries to push themselves and us for an excellent experience. If time permits, will book this dive again. If not for sure next time.
  
 
      Posted on Tripadvisor  
   
   Aditya P 
 
 
 
 Verified Fantastic first experience in scuba diving.
We had a wonderful experience with Frogman. We had Neelkanth and Ketan sir as our diving instructors. It was our first time trying it out. The pre-training was very clear. In the first 10 minutes open sea, I even had a panic reaction, but Neelkanth sir calmly got me to the surface and explained my mistake patiently, and we went back underwater, and it went all superbly well!
  
 
      Posted on Tripadvisor  
   
   Sagar N 
 
 
 
 Verified Scuba diving
Amazing experience, Would recommend
  
 
      Posted on Tripadvisor  
   
   Sandeep K 
 
 
 
 Verified scuba with frogman
Awful experience...the divers are so good.Plzz try frogman once u never disappoint
  
 
      Posted on Tripadvisor  
   
   Quest60314418233 
 
 
 
 Verified Review of my scuba dive experience with frogman adventure
Experience was very good and the price was Good and the instructors were very responsible and it was the best experience of my life . A 10/10 life time experience ❤️
  
 
      Posted on Tripadvisor  
   
   jayeshb08 
 
 
 
 Verified Best Scuba Experience with Frogman
It would highly recommend this business to go without any hesitation. We were 3 people and each one had 1 instructor with them. We got a 5 min training before the dive and then explored the underwater world. Saw fishes and corals and safety was well taken care off.
  
 
      Posted on Tripadvisor  
   
   Srujan K 
 
 
 
 Verified Amazing deep dive experience
Amazing deep dive experience with Frogman in Havelock Island! 🌊🤿 The instructors were professional, friendly, and made me feel completely safe. The underwater views were absolutely breathtaking with beautiful corals and marine life. Highly recommended for anyone visiting Havelock! ✨

Dive the Best Reefs in Andaman

Scuba diving reefs in Havelock and Andaman

We dive the best spots around Havelock, where visibility is at its best. From shore dives at Nemo Reef to boat scuba diving in Havelock at Tribe Gate and The Wall, we pick the right site for the conditions.