Become an Enriched Air Instructor: Your Next Step

If you've already qualified as a PADI Open Water Scuba Instructor and you're wondering what comes next, the Enriched Air (Nitrox) Diver Specialty Instructor course is one of the smartest additions you can make to your teaching card. Nitrox is the single most popular specialty in recreational diving, and being able to teach it opens up steady, repeatable income and a genuinely useful skill you'll use on almost every trip you run.

What Is the Enriched Air (Nitrox) Instructor Course?

The course qualifies you to teach the PADI Enriched Air Diver specialty to your own students, rather than simply holding the certification yourself. Enriched air, or nitrox, is breathing gas with a higher percentage of oxygen than normal air, typically 32% or 36% oxygen instead of the usual 21%. Diving on nitrox within recreational limits extends your no-decompression time and can reduce residual nitrogen, which is why so many divers want the qualification early in their diving life.

As the instructor, you'll be teaching gas blending theory, oxygen exposure limits, equipment considerations, and how to plan dives safely using enriched air tables or a nitrox-capable computer. It's a classroom and confined-water-heavy specialty, which makes it a genuinely enjoyable one to teach, with no long open water days required to run a full class.

Who Should Take This Course

This course is aimed squarely at working or aspiring PADI instructors who already hold their Open Water Scuba Instructor rating and want to expand what they can teach. It's also a natural fit for Divemasters who are partway through the Professional Academy pathway and planning ahead for their instructor development. Because nitrox is requested constantly by everyday recreational divers, this is one of the highest-demand specialties an instructor can add to their card.

You don't need any technical diving background to join. Nitrox at recreational depths and percentages is straightforward, and the instructor course focuses on teaching methodology and safe gas handling rather than complex physiology or decompression theory.

Prerequisites Before You Start

To join the course you need to already be a certified Open Water Scuba Instructor, or currently be an active OWSI candidate, and it helps if you personally hold the Enriched Air Diver specialty certification, though our instructor team can build that in alongside the instructor training if you don't yet have it. You'll also want to be comfortable with basic dive planning and simple gas calculations before you arrive, since a good chunk of the course assumes that foundation is already solid.

A Typical Day on the Course

Most candidates complete this specialty instructor course in a single focused day at our Enriched Air Nitrox Diver Specialty Instructor course at Bellman Court. The morning is spent working through the standards and specialty outline with one of our course directors, covering exactly what a student needs to know and how PADI expects it to be taught. You'll practise explaining oxygen exposure limits, analysing a cylinder with an oxygen analyser, and talking a nervous first-timer through why nitrox isn't something to be afraid of.

In the afternoon you switch into teaching mode yourself. You'll run a mock knowledge review, deliver a short presentation as if to real students, and demonstrate how to check and label a nitrox cylinder correctly. It's hands-on and practical rather than sitting through slides, which is exactly what makes the training stick.

What You Will Actually Learn

Teaching the Theory

You'll come away confident explaining oxygen toxicity, maximum operating depth, equivalent air depth, and how enriched air tables differ from standard air tables. More importantly, you'll learn how to explain these ideas simply, in language a first-time nitrox diver can actually follow, without drowning them in numbers they don't need yet.

Confined and Open Water Presentations

You'll also learn how to structure the practical side of the specialty, including cylinder analysis and labelling procedures, so your future students leave with habits that stick for the rest of their diving career, not just for the exam on the day.

Common Questions Before Booking

Do I need to be a strong swimmer or technical diver already?

No. This is a classroom and equipment-focused specialty rather than a physically demanding one. If you're already comfortable teaching Open Water students in the pool and open water, you have the skills you need to succeed here.

How long does the course take?

Most candidates finish in a single day, though if you're combining it with earning your own Enriched Air Diver certification first, it's worth budgeting for an extra half day.

Will this help me get hired?

Very likely. Dive centres and liveaboards routinely list nitrox teaching ability as a preferred or required skill, since guests ask for it constantly on holiday and expedition trips.

Why It Is Worth Doing

Beyond the career value, teaching nitrox is genuinely satisfying. Divers who take the course with you usually notice a real difference on their next few dives, longer bottom times and less fatigue at the end of a day underwater, and that feedback loop makes it one of the more rewarding specialties to teach again and again throughout your career.

How It Fits Into Your Instructor Pathway

Enriched Air is often the first specialty instructor rating that new instructors add, precisely because it's quick to complete and immediately useful. From here, many of our instructors go on to add Deep, Wreck, or move into our Tec Academy pathway for technical diving instruction. Whichever direction you take next, having nitrox on your teaching card early means you can start generating specialty income right away, rather than waiting until you've built up a longer list of qualifications first.

What You Will Need to Bring

You don't need any specialist personal equipment for the instructor course itself, though it's worth bringing your own dive computer or slate if you're used to working with one, along with a notebook for the standards discussion, since there's a lot of detail to absorb in a short space of time. We supply the oxygen analysers, sample cylinders, and teaching materials you'll need during the day, so there's no need to source your own before arriving at Bellman Court.

If you're also completing your own Enriched Air Diver certification alongside the instructor training, you'll need your usual open water kit for the confined water and open water dives that make up that qualification, plus proof of your current certification level so we can register you correctly with PADI.

Building Specialty Income as an Instructor

One thing new instructors often underestimate is how quickly a single well-taught specialty can become a reliable part of their working week. Nitrox is requested by such a wide range of divers, from newly certified Open Water divers wanting longer bottom times on holiday to experienced divers topping up their card before an expedition, that it rarely sits idle on a teaching roster. Many of our instructors find that Enriched Air classes fill gaps between larger courses, turning what would otherwise be a quiet afternoon into a productive, well-paid teaching session.

It also pairs naturally with other specialties. Instructors who teach Enriched Air alongside Deep Diver or Wreck Diver specialties often find that students book multiple courses together, since nitrox complements almost any specialty that benefits from extended bottom time. Building a small cluster of complementary specialties like this is one of the most practical ways to grow a sustainable teaching income within the Professional Academy pathway.

Ready to add Enriched Air to your instructor card? Book your place on the Enriched Air Nitrox Diver Specialty Instructor course or get in touch to talk through timing - we're at Bellman Court, Great Knollys Street, Reading, or call +44 (0) 118 9761 729.