Dive Rite O2ptima CM CCR

Incredibly versatile, self-contained, and travel ready, the O2ptima CM will change the way you think about rebreathers. The chest-mounted design easily attaches to almost any harness using four bolt snaps. This means it is fully compatible with your current open-circuit diving system — be it sidemount, back mounted doubles or single tank.

The self-contained design comes with an onboard oxygen cylinder. This means there is only one external connection for the diluent from your existing gas supply. You simply need to add one BC hose from your existing 1st stage to power the CM. You can learn more on Dive Rite’s website. offers not one, but two different “ChO2ptima” learning opportunities.

  • If you lack prior CCR experience, there is a five-day program that will take you all the way through to full CCR Diver certification.
  • If you are already certified on another CCR, there is a two-day crossover program that will make you a fully-certified O2ptima CCR Diver.


If you have no prior CCR experience:

  • Be at least 18 years old
  • Have at least 50 logged dives
  • Be certified to the Advanced Nitrox/Deco Procedures Diver level or equivalent

If crossing over from another CCR certification:

  • Have logged at least twelve CCR dives
  • Have made at least one CCR dive in the past 45 days

Time frames

  • The “from scratch” CCR course takes five days and at least 400 minutes of bottom time.
  • The crossover course takes two days and at least 200 minutes of bottom time.
  • With sufficient notice, we can usually accommodate requests for specific course dates.

Required equipment

  • Mask and flat-bladed scuba fins with adjustable or spring heel straps
  • Adequate thermal protection for prolonged exposure to 21° C/72° F water
  • Sidemount or backmounted doubles harness
  • BC air cell with adequate lift for the cylinders used
  • Either backmounted doubles or two sidemount cylinders
  • Two separate regulator first and second stages
  • At least one mission-capable dive computer
  • Slate or wet notes
  • Two Z-knives or comparable cutting tools
  • One primary light
  • Two backup lights
  • Two safety reels/spools with a total of at least 50 m/150 ft of line

Be aware than any equipment you use must meet very specific requirements. Learn more…

Items such as cylinders and primary lights, which may be difficult to travel with, are available for rental. Be sure to alert us if you will need any of these.

 Choose your price

Know what you’re getting: Prices include instruction and eLearning fees. Bear in mind, the cost of eLearning, by itself, can be worth anywhere from $140 to $280 or more. Thus, a $640 course from us may actually cost the same as a $500 course from someone else if you have to pay for elearning separately.

Certification cards: We issue these only when earned. Simply taking part in a course does not guarantee certification. For cave courses, certification cards from multiple training agencies may be available. C-cards generally cost around $30 each, depending on agency. Your instructor can tell you more.

Complete Course

If learning from scratch
$ 1,500 Single student price
  • Five days
  • 400 minutes of bottom time

Crossover Course​

If you are already a CCR diver
$ 600 Per student for two or more
  • Two days
  • 200 minutes of bottom time

eLearning included at no extra charge

Computer-aided instruction is an integral part of nearly every course we teach. The Why? is simple: eLearning helps get our students in the water sooner and spend more time there. It’s why we include the cost of any applicable eLearning programs — usually a $140 value — in our courses at no extra charge. This translates directly into an extra day of in-water training. The value of that? Priceless.

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