Or just $180 if combined with a SSI Advanced Adventurer course or even Wreck or Deep Diver course

Stay down longer with an Enriched Air Nitrox Course

Nitrogen, you learned about it as an Open Water Diver, then again as an Advanced Open Water diver.  You started to understand how it really affects you and your allowable bottom times ,(NDL – No Decompression Limits). Well why not reduce the amount of nitrogen we breathe?

Diving on Air (21% – Oxygen – O2 / 79% Nitrogen N2) to 18m, you can potentially stay for up to 56 minutes if you have enough air in your cylinders. Compare that to Enriched Air Nitrox x32 (EANx32)  (32% O2 / 68% N2), where you can stay for up to 95 minutes and on 36% for up to 126 Minutes assuming you have enough gas volume with you.

Go a little deeper on air (21% O2) to 25m (say on the Canterbury or Waikato wrecks or anyone of the many sites at the Poor Knights Islands) and you can only stay for up to 28 mins. But on EANx32 (32% O2) you can stay for up to 40 minutes and on EANX36 (O2 36%) for up to 50 minutes.  

Is it starting to make sense yet? Now add in the cost of a dive trip versus  the time you spend underwater and the training will be well worth it.

So to dive on “Nitrox” you just need to complete the Enriched Air Nitrox course with us.  This involves reading the SSI e-learning and then attending an evening of theory here in the classroom.   We will plan some dives of different depths using different EANx mixes to decide which mix will be the best for that dive and practise analysing scuba cylinders containing EANx. .

If you’d like to then dive with Nitrox you are more than welcome to join as at the Poor Knights. Note the cost of these trips is not included in the course cost. 

Air Nitrox Course
Enriched Air Diver
Course Dates
Remember you can start your e-learning at any stage and then book your course dates later if you are unsure which course you would like to do. We run these all year around so if you have a specific date in mind then just ask. Dates are flexible with this course, so use the booking form to select a date that suits you and we'll try and arrange the course around you.

Cost: $250 | online study | 2 hour theory session | 2 “Fun” dives with your Instructor (charter fees are not included in course costs, but you can choose to do shore dives which are free of charge)

Cost includes all training, certification and study materials. Any specialist equipment will be provided for the duration of the course.


  • SSI Openwater Diver or equivalent

Before you start the course:

  • Before you start the course you must complete the SSI Enriched Air Dive online study.  
  • You have to fill out a medical questionnaire to check whether you are fit to dive.
  • Ideally, you’ll train using your own equipment but we do have equipment available in our school if required.

Transportation is not provided by Dive Now Whangarei, but we do our best to help organise carpooling to the dive sites. 

Opening Hours | Mon-Fri 8.30-5.00pm  | Saturday 8.30 – 1pm | Sundays Closed

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