What is Enriched Air Nitrox?

Nitrox is a blend of oxygen and nitrogen, featuring a higher percentage of oxygen than typically found in ordinary air cylinders. Nitrox can be defined as any mix of nitrogen and oxygen with oxygen levels greater than 21% but less than 100%. However, at most dive shops, resorts, or liveaboards, you will typically find a range between 28% and 36%, never exceeding 40%.

The Powerful Benefits of Nitrox

• Extended Bottom Times: By increasing the proportion of oxygen and reducing nitrogen, Nitrox allows for longer theoretical bottom times at the same depth. This is particularly beneficial for recreational divers looking to maximize their time exploring a dive site.
• Reduced Nitrogen Absorption: Less nitrogen in your breathing gas means reduced nitrogen absorption, which translates to a lower risk of decompression sickness (DCS). This reduction also often results in a shorter surface interval between dives.
• Shorter Required Surface Intervals: With the ability to reduce nitrogen absorption, the time needed to “off-gas” during surface intervals is significantly reduced. This is one reason many advanced charters and dive packages require Nitrox certification.
• Improved Safety Margins: Mixed gases allow divers to manage decompression more effectively by optimizing the gas mixture for specific depths and durations, improving overall safety.
• Opening the Door to New Diving Experiences: If you’re keen on diving in breathtaking locations like the Red Sea, Maldives, or Galapagos Islands, a Nitrox certification is often a prerequisite.

With Nitrox, every dive becomes an opportunity to explore more and worry less thanks to extended bottom times, reduced nitrogen absorption, and shorter surface intervals. It’s a step toward safer, more rewarding underwater adventures.

- Kyle Minar, Seasport Divers

Planning on Diving with Seasport Divers?

If you’re already planning on diving with Seasport, it’s a great opportunity to earn your Nitrox Certification. The cost for certification is significantly reduced, and you will dive with Nitrox tanks during your recreational dives for free! Make sure to talk with one of our knowledgeable shop staff members about adding a PADI Enriched Air Nitrox certification to your dive plan while in Kauai.

Training and Certification

Diving with Nitrox and mixed gases requires specialized training and certification. PADI, for example, offers Nitrox courses as part of its Advanced Open Water Diver certification, while technical diving agencies provide advanced courses for Trimix and other mixed gases. Proper training ensures that divers understand the risks and procedures associated with using these gases, including:

Key Training Components

• Gas Management: Learning how to plan and manage gas mixtures effectively for safe diving.
• Gas Mixture Measurement: The #1 rule in scuba diving is to never hold your breath. This principle is crucial when diving with mixed gases or Nitrox. Always measure your tank's gas concentration before use to ensure safety.
• Dive Planning: Mastering the understanding of partial pressure, gas concentration at depth, and how to set your dive computer to the appropriate O2 percentage are critical for effective dive planning.
• Max Operating Depth (MOD): Understanding the risks associated with higher oxygen concentrations at extreme depths is a major component of Nitrox training.

Conclusion

Diving with Nitrox and mixed gases opens up a world of possibilities for divers looking to extend their underwater adventures safely and effectively. Whether you’re aiming to explore deeper dive sites for longer periods, extend your bottom time, or reduce risks associated with traditional nitrogen mixtures, Nitrox is the right next step for you. Proper training, equipment, and dive planning are essential for making the most of Nitrox and mixed gases, ensuring that your underwater explorations are both thrilling and safe.

At Seasport, our MSDTs, Specialty Instructors, and IDC Staff Instructors are intimately familiar with all aspects of Nitrox diving. You can rest assured that not only will you receive your certification, but you will also gain a thorough understanding of all necessary practices.

FAQs