Nitrox Diving
(up to 40% O2)

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To reserve a place in an upcoming class, you may select your next available date and proceed with your course fee payment. Please note that the schedule will depend on pool and instructor availability. Our training team will follow up with you to schedule your course dates. They can be reached at

Nitrox is a mix of Oxygen and Nitrogen that is different than what is in air. Typically the difference is that there is more Oxygen in the Nitrox that divers use resulting in less Nitrogen. As certified divers know, Nitrogen is responsible for decompression sickness, so limiting its percentage in the gas we breathe can result in SIGNIFICANTLY more time underwater for each dive.

The SSI Enriched Air Nitrox program will teach you how to safely plan and dive with enriched air mixtures of up to 40% oxygen.

Why learn to dive Nitrox?

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 32% or 40% certification after completing this program. Nitrox diving is growing in popularity among recreational divers. Come and learn why so many divers are changing their breathing mixtures even for dives to 40 ft. Take your Nitrox course from the first store to teach Nitrox in Massachusetts… EAST COAST DIVERS!

Before Class

Before your Nitrox Course, there is a bit of paperwork you’ll have to fill out. This program requires 3 distinct forms. You can find the forms below and complete them ahead of your class session. This is a classroom only course and does not need any medical or physician sign-offs given that there is no in-water training.





  • Minimum age: 10 years old.
  • Be a Referral Diver or higher, or hold an equivalent certification from another recognized training agency.

Interested in a private? We got you covered! Sign-up today!

Private courses are set up slightly differently than regular Nitrox Courses. The beginning process is the same – you’ll still be required to fill out the same paperwork but you won’t be tethered to our schedule. Instead, you can find out whenever works best for you and let us know so we can get the session scheduled.

Private Scheduling is done through Kim and Max in our training department at They will be in contact within 24 hours of any inquiries. If you need to contact us sooner please call us at 617-277-2217. Please contact us for pricing and sign-up information.

No equipment necessary as this class is strictly classroom. As always you can bring a pen and pencil or a snack!

  • A 3-hour webinar covering Basic Nitrox training for use up to 40% Oxygen.
  • A 15-minute practical session must be conducted at ECD after the webinar.
  • Skills such as gas analysis, determining best-mix for a dive, and techniques for avoiding fire and Oxygen dangers.
  • Internationally trained/certified instructor
  • Agency approved on-line course work.

Class Forms

Below you will find links to REQUIRED class forms. These forms must be reviewed in their entirety before participating in any ECDivers in-water program. Arrival to class with incomplete documents may result in a forfeiture of that class date. If you have any questions or need assistance in completing the class forms please email our training department at