SSI Enriched Air Speciality at Dive Rutland

Enriched Air Speciality (Nitrox): SSI

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SSI Enriched Air (Nitrox) Speciality

The Enriched Air Nitrox(EAN) or generally referred to as Nitrox speciality introduces you to all thinks Nitrox.  This is air with a higher concentration of oxygen in it. Breathing a higher concentration of Oxygen means you are breathing less Nitrogen, which means you increase your no-stop times (the length of time you can stay diving, in simple terms).

This allows you to stay underwater which means you have longer to explore and maybe take those pictures you so desperately want to take, any excuse to stay underwater you wish really.

Not interested in longer bottom times, then one other advantage is shorter surface interval times and it makes you feel less tired if you do a lot of diving in a week (scientifically unproven, but a large number of divers agree!)

A larger number of dive resorts are now providing nitrox free to qualified divers particularly if they are a long distance away from a hyperbaric chamber, so if free and it provides the benefits we have mentioned then why not dive it

BUT there are downsides to breathing higher concentrations of Oxygen and during this course you will learn about those to allow you to understand the pro's and con's.

Also, it is essential that if qualified to dive on Nitrox you own or have access to an analyser. You simply should not rely on the cylinder filling station to fill your cylinders with the correct mix every time without getting it wrong now and then. People make mistakes, so each diver needs to be self-responsible and analyse their own breathing gas.

On completing this course you will be able to dive with Nitrox up to a maximum of 40% oxygen.

This Speciality certification also counts as one of the five Speciality certifications required for your SSI Master Scuba Diver certification.  This certification is automatically awarded on logging 50 dives, 5 Specialities and achieving Diver Stress and Rescue

What Do I need?

  • Open Water Diver (or equivalent qualification)
  • 10 years or older for this course
  • Dive Computer (we will provide for the course if you do not have)

What will I do during this course?

You will complete some self study using the supplied manual or e-learning, followed by an in class session, where you will:-

  • Learn how to care for equipment used in enriched air diving
  • Learn how to avoid possible operational hazards and underwater hazards associated with oxygen
  • Learn to setup and use a Nitrox analyser
  • Practise analysing two cylinders or more as required and completing the required paperwork
  • Practise marking the cylinder as part of dive equipment preparation for a dive
  • Using the results of the cylinders analysed, configure your dive computer and plan a suitable dive.
  • If you have chosen to complete the speciality with dives then you will plan and make no decompression dives using enriched air blends containing 22% to 40% oxygen, remaining within accepted dive table and oxygen exposure limits using tables and dive computers
  • Learn about Daltons Triangle and how to use

But I do not own a computer

If you do not own a computer, not an issue, we will supply you with one of our school computers either an Aqualung i300c or a Suunto EON Core. But, if you do, please bring it along.

​Or better still why not take advantage of our combined computer and Enriched Air Speciality offer that is currently running


As part of your course you will be be provided with access to the online SSI academics for you to complete the online learning element

Any Other Information?

Yes, you can choose to complete TWO open water dives using Nitrox for an uplift in price

​Yes, see our article that explains all about enriched air / Nitrox

Whats Next?

The primary aim of gaining additional bottom time or shorter surface intervals is to go diving, so come diving with us or book that trip you know you want to go on.  We would be happy to facilitate for you.

Want To Know More

Prior to any Diver training course students need to complete a Mandatory Medical Questionaire.

Please ensure that you have read the Medical Statement and are sure that you will be able to commence any diver training PRIOR to paying as our Training Terms Conditions apply after payment has been made.

A doctor's confirmation of fitness to dive is required if you answer YES to any medical condition on the Medical Statement.

You can check out the Medical Statement here:

PADI Courses:

PADI Medical Statement

SSI Courses:

SSI Medical Statement

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Our team of highly experienced instructors will be on hand to guide you through every step of the way, and to make sure you have a safe and enjoyable diving experience.

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Don't take our word for it


I cannot rate Dive Rutland high enough. Tracey, Bridget and all the team have shown me unending patience and understanding and I have got my open water certification. Thank you to you all for sharing your knowledge and tips. Can't wait to start my next course.

Carrie Spence

Northampton, UK


We are lucky to have a top notch Dive school on our doorstep in the form of Dive Rutland, My thanks to Bridget my instructor for her endless enthusiasm both in the theory and the practical applications of diving. Then to Tracey again for your skill and excellent support and for putting together a great community of divers who have helped and supported us.

Trikes of Bytham

Bytham, UK


Friendly, professional and committed to ensuring you get the best diving training and diving experiences, whilst upholding the highest of standards. Tracey and her team offer everything you need from newbie to experienced diver. Highly recommended.

Joanna Aitkens

Leicester, UK