Enriched Air Course

An Enriched Air Diver course typically covers a range of essential topics designed to ensure your safety and proficiency with Nitrox. You'll learn about the physiological effects of oxygen and nitrogen at depth, understanding how increased oxygen percentages affect your body and how nitrogen absorption is reduced. This includes recognizing the signs and symptoms of oxygen toxicity and how to prevent it.

Furthermore, the course places a strong emphasis on practical skills such as analysing your dive cylinder's gas content to verify the oxygen percentage and calculating your maximum operating depth (MOD) based on the specific Nitrox blend. You'll also master dive planning techniques tailored for enriched air, including using specialized dive tables or your dive computer's Nitrox settings, to maximize your bottom time safely and stay well within no-decompression limits. The training ensures you can make informed decisions to enhance your diving experience.

The primary advantage of diving with enriched air is the significantly extended no-decompression limit (NDL), especially on repetitive dives. Because there's a lower percentage of nitrogen in your breathing gas, your body absorbs less nitrogen during a dive. This means you can stay underwater longer than you could with air, enjoying more time observing marine life or exploring wrecks without incurring decompression obligations.

Beyond extended bottom times, many divers report feeling less fatigued after multiple enriched air dives. While not scientifically proven across the board, the reduced nitrogen load is believed by some to contribute to a feeling of being less 'gassed' at the end of a busy diving day. This can be particularly beneficial on multi-day dive trips, allowing you to maintain your energy and enthusiasm for each subsequent dive.

For anyone considering a liveaboard dive holiday, an Enriched Air certification is arguably the most valuable specialty to hold. Liveaboards are designed around maximising your time underwater, with schedules often including three to four dives per day, plus night dives, over several consecutive days. Diving on air during such an intensive schedule can quickly lead to significantly reduced no-decompression limits on later dives, cutting your underwater time short.

With enriched air, you can fully embrace the liveaboard experience. You'll be able to enjoy longer dives, make the most of every site, and often avoid the frustration of having to ascend earlier than your buddies who might be diving on air. Many liveaboards offer Nitrox as a standard inclusion or at a minimal additional cost, making it an easy and highly recommended upgrade for any diver wanting to get the absolute most out of their safari.

Myth: Nitrox lets you dive deeper. Fact: The opposite is true. Because enriched air has more oxygen, your Maximum Operating Depth (MOD) is actually shallower than when diving with air, due to the risk of oxygen toxicity. Nitrox is for longer bottom times, not deeper ones.

Myth: Nitrox prevents decompression sickness. Fact: While using enriched air significantly reduces your nitrogen absorption, thereby extending your no-decompression limits and potentially lowering the risk, it does not make you immune to decompression sickness. Proper dive planning, ascent rates, and safety stops are still crucial.

Myth: Nitrox is a complex technical diving gas. Fact: Recreational enriched air (up to 40% oxygen) is a widely used and relatively simple specialty. The training focuses on fundamental safety practices and planning, making it accessible to any certified Open Water diver without venturing into technical diving complexities.