Nitrox Diving
(up to 40% O2)

Book Now!

Once you book your course, our team will register you for class materials. You will receive an email with a link to your materials from the agency (SSI or SDI/TDI). Our training team can be reached at if you have any questions about the course.

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!


All ClassesDrysuit Diving | Deep Diving | Navigation | Enriched Air Nitrox

Before Class

Before attending your class you will need to complete some paperwork. The forms will be emailed to you for your review and can be completed by DocuSign prior to your class.

This class also has a helpful online training component hosted by SSI. Please complete your online training prior to your classroom session. If you have not already registered with SSI, look for an email from You can access online training materials, certification cards, and more at or the MySSI app on your iPhone or Android.

Click here to register:

SSI - Scuba Schools International - - Register Now

If you have any questions give us a call at the store on 617-277-2216 or shoot us an email

  • 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