Screen Shot 2021-07-02 at 4.14.17 pm.jpg

Dive Rite O2PTIMA CM eCCR - Sales
TDI O2PTIMA CM eCCR Diver Course

Incredibly versatile, self-contained, and travel ready, the O2ptima CM (affectionately known as the ChOptima) 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. Any harness that can accommodate two high shoulder D-rings and 2 waist D-rings will be accept the O2ptima CM. The rebreather can be easily added or removed for any mission, on the fly (even underwater).

The self-contained design utilizes an onboard oxygen cylinder, meaning 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. This simplicity allows for limitless possibilities of use. You can add it to your single tank rig for a deep ocean dive in the morning, and then remove it for a shallow open circuit reef dive in the afternoon. It can be used in place of a stage bottle to greatly extend penetration distances in overhead environments while maintaining adequate and redundant bailout gas. It can be removed and staged underwater for later decompression or to negotiate tight restrictions and then picked up upon your return.

Weighing only 6.5 kg's (not including scrubber material or oxygen cylinder), traveling with a rebreather has never been easier. Because there is no hard frame or backplate, the entire assembly can be easily rolled up and stowed in a carry-on bag. The single best word to describe this unit is VERSATILE!


Available to purchase right here in Western Australia through Dive Addiction (P.O.A. due to exchange and shipping rates). Delivery is usually 4 - 6 weeks subject to availability. To read more down load the Dive Rite O2ptima CM Manual

Air Diluent No Decompression 30 meter course.

CCR's are suitable for recreational divers, not just technical divers. CCR diving brings the marine life to you. With no bubbles or noise the marine life treat you like another fish. No more scaring away critters with those bubbles while taking that magic shot or video.

Air Diluent Decompression 40 meter course.

CCR's are like a portable gas blending machine strapped to your back. Technical divers receive the advantage of having the best breathing mix provided at every depth thus reducing decompression obligations.

Helitrox Diluent Decompression 45 meter course.

Adding Helium to the breathing mix reduces narcosis and makes breathing easier (lower gas density). And with the reduced gas consumption, Trimix (a combination of Oxygen, Helium and Nitrogen) becomes relatively economical.

But why choose the O2PTIMA CM eCCR?

  • The O2ptima CM is a fully electronically controlled closed circuit rebreather (eCCR) using state-of-the-art Shearwater electronics, 

  • The breathing loop is one of the shortest of any rebreather on the market,

  • The unique scrubber design is fully compatible with the MicroPore Extendair cartridge while also being packable using approximately 5 pounds (2.2kg) of granular absorbent,

  • The dual counter lung design and 6L total loop volume provides incredibly low work of breathing (WOB) in a variety of diver orientations, 

  • Compact design ideal for overhead diving and rugged enough for the toughest expeditions,

  • Threaded loop connections for easy removal of the scrubber and cleaning,

  • Rated to 40 m on Air and 100 m on Trimix,

  • Dual water traps inside the counter lungs and scrubber end cap,

  • Redundant Shearwater DiveCAN electronics including Heads-Up Display (HUD) and Petrel 2 controller,

  • Travel weight 6.5 kg's (excluding Scrubber media and cylinder),

  • Optional Shearwater NERD Controller or Shearwater NERD monitor.

Pre Course - e-Learning module (30 / 40 / 45 m course - same e-Learning course)

Day 1 - Theory, Gear Configuration, Build the unit, Pool Session

Day 2 - Theory, Open water Dive 1

Day 3 - Theory, Open water Dive 2 & 3

Day 4 - Theory, Open water Dive 4 & 5

Day 5 - Theory, Open water Dive 6 & 7

Day 6 - An additional day is allowed for in case it is required (weather conditions and the like)

(30 m and 40 m course are the same with the 40 m course requiring decompression dives)

Helitrox Add on option

Day 6 or 7 - Theory, 2 x Dives on a Helitrox blend. 

Water skills include CCR trim and buoyancy  PPO2 monitoring, maintain minimum loop volume, bail out scenarios, BOOM drills, manual and electronic control of the unit, SMB deployment, O2 / Diluent flush, stage swapping, and much more.


1 x Optima CM eCCR 

Back up CCR/OC dive computer

Exposure suit adequate for diving environment 

Mask, spare mask, cutting device and tec fins 

Surface Marker Bouy (with 25 lb lift) and reel of sufficient length (depth + 50%)

Full Open Circuit configuration in any of the following options:

Back Mount Single Tank Harness System 

Back Mount Twin Tank Harness System (independent or manifold)

Side Mount Twin Tank Harness System (must be certified as a Side Mount Diver with 10 logged Side Mount dives)

Slate and or wet notes (plus pencil)

Access to a gas analyser


O2ptima units are available for sale and hire through Dive Addiction

30 m no Deco and 40 m Deco courses - same price

Local shore dives included

Boat charges are in addition to prices stated.

Consumables (Gases other than air P.O.A. and sorb)

Instructors consumables are paid for by student/s

Dive planning software is an additional charge.




5 - 7 Days


3 : 1



Air fills

Certification card

Gear hire

   excl unit hire and

   subject to availability 

30 m No Deco


Nitrox (40%)

Side Mount

20 dives

40/45m Deco

Side Mount,

Advanced Nitrox,

Decompression Procedures

50 dives

If completing the course in Side Mount configuration then a Side Mount Certification is required with 10 post course Side Mount dives.

Price (AUD)


$2100 Inc GST

(30m or 40m cert)

+ $695 Helitrox 

(Inc 40/45 m dual cert)

Unit Price