SSI Extended Range Technical Courses

    SSI courses to take you beyond the recreational limits...

    Become a specialty diver by learning about the future of scuba diving with Enriched Air. If you increase the amount of oxygen in your tank & thereby decrease the amount of nitrogen then you will be able to increase the length of time you can stay at your maximum depth leaving the opportunity to explore more. This is known as Nitrox diving. An essential dive certificate for all serious divers.

    What's Involved?

    The Specialty diver SSI Enriched Air Nitrox program will teach you how to safely plan and dive with enriched air mixtures of up to 40% oxygen. Scuba Diving with enriched air can increase your no-decompression limits, increase your safety, and reduce the required length of your surface intervals when compared to air. You will earn the SSI Enriched Air Nitrox 40% dive certificate after completing this program (32% for Junior Divers).

    How long will it take?

    What do I need to start?


    Am I Fit to Dive?

    Read this Medical questionnaire,if you can answer yes to any of the questions, you may require medical clearance to enroll on a diving course. Email us if you want more information.


    5,500 Baht with two complimentary Nitrox tanks for use with fun dives (see itinerary)

    Get Started

    Big Blue Diving
    15/3 Moo 1 
    Koh Tao 

    Ph :+66 (0) 77 456 050
    Fax: +66 (0) 77 456 772

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