Project Description

We are Boston's premier diving education center for Advanced Nitrox & Decompression Procedures Classes and other Tech diving lessons in Massachusetts and New England!

About The Course:


Are you looking to expand your dive time?Are you finding your no- decompression limits (NDLs) a limiting factor to dives and you have to ascend sooner than you would like? Maybe you’re a scientific diver or photographer looking to stay in the water a little longer? The TDI Advanced Nitrox & Decompression Procedures Course qualifies divers to use enriched air nitrox from EAN 21 through EAN 100 percent to a maximum depth of 45 metres/150 feet during dives that utilize a stage cylinder to accelerate decompression.

This can be considered the foundation of your technical diving career. The TDI Decompression Procedures Course combined with the TDI Advanced Nitrox course form the foundation of all other technical courses. After these two courses and some additional experience, the stage has been set for you to move onto additional technical levels such as CCR and Trimix.

First thing on the list is to Register and Pay. The course cost's $900 PLUS TDI folder and materials. Once you've paid you'll have to register with TDI

This course only runs from May - October
Before buying make sure you check out the schedule so you can make the next upcoming course!  To find out more about the online signup process check out the tabs above. Remember, if you get stumped or if you have questions that aren't answered by the website you can always call (617) 277-2216 or shoot us an email at and we'll do our best to help!

Before Class

Note- All the paperwork you'll need, along with a what to do before class checklist is located at the bottom of this tab.

Before you can start class you'll need to fill out some paperwork. Most of this can be done ahead of time, but some of it will have to be done in the shop. The only piece that MUST be completed at the shop is a folder provided by SSI. You will need to fill this particular folder out in the shop as we keep it for our records. You can do this before class - just remember to show up 30 minutes early if you haven't filled it out yet!
There are a couple of forms that can be done ahead of time. Most important is the medical. Go through the medical now and check to see if you need to answer "YES" to any of the questions. If so no big deal - you'll just need to get a doctors' sign-off before we can let you in the pool. The doctors' note is in the same file as the medical - Just scroll down to the next page. Remember IF you answer "YES" to anything in the medical it is COMPULSORY to get a doctors' note BEFORE getting in the pool.



The Advanced Nitrox course is very intensive and includes 8 open water dives Check out the schedule and make sure you can attend everything in advance! This course is typically done on a semi-private basis, if you have trouble with any skills or need to repeat anything you will be able to do so directly through the instructor


This course is split between various locations. Classroom will be held at the shop (213 Boyston street, Brookline, Ma. The Pool we use is the Brookline Pool and is located at 60 Tappan street, Brookline Ma, 02445. and the Open water sessions will be done in a series of locations depending on the instructor and weather. Some popular spots can be found in the directions tab above.

Private Courses

Due to the intensive nature of this course, it is rare that we run private courses. Furthermore, scheduling this course makes it even more difficult to set up Private courses over the internet. If you would like to take this course, but don't see any availability please address your inquiries to Alex, the head of our Tech Diving department. You can email him at

Equipment & Gear Rentals

As you may have guessed this course is very equipment intensive! There are various ways you can do this course - either with back-mount or side-mount (You should know and be comfortable with whichever rig you're planning on taking down), We offer rental gear for anything that you don't yet have or even complete packages that can be Nitrox ready.

Searching Availability...

Students are required to own their own mask, fins, snorkel and booties (if necessary). We have all of these available in the shop or they can be purchased below for your convenience!


  • 18 Years or older
  • Must be a certified Nitrox Diver.
  • Must be a certified Deep Diver
  • Must be a certified Rescue Diver
  • Must be a Drysuit Diver (local courses only)

What's Included:

  • 3 day of classroom training
  • 1 Pool Session
  • 8 open water divers
  • Internationally trained / certified instructor.

Buy It Here!