DIVEX Logo COBRA (Compact Bailout Rebreathing Apparatus)


COBRA is a back-mounted emergency breathing system which provides life support in the event of primary breathing system failure. It is a semi closed circuit design which provides far greater duration than that of the open-circuit bail-out systems.

COBRA provides significant safety advantages to commercial saturation diving activities:

Offline Positive pressure

Maintains breathing lop integruty during rapid ascent. A Rotowink positive pressure indicator provides visual assurance of breathing lopp integrity.

Warmth & Hydration

Rebreathed gas is warm and humid. maintaining divers' core temperature and reducing dehydration.

Simple activation

COBRA is activated, and de-activated, with a single turn on the helmet.

Fully Enclosed

Protection of the breathing circuit is maximised by COBRA's fully enclosed design/

Optimum Scrubbing Duration

COBRA's pre-heated CO2 scrubbing system maximises CO2 absorption duration.

Rapid Recharge

Scrubber and gas supply are quickly recharged, ready for their next deployment.

Technical Specification


  • Depth171 mm
  • Width398 mm
  • Height519 mm
  • Weight (dry)26.1 kg
  • Bouyancu-3.5 kg


  • Maximum Ascent30 msw/min
  • Maximum Descent30 msw/min
  • Offline Loop Positive Pressure+ 40 mbar
  • Maximum450 msw
  • Operational Temperature - Seawater+1 C to + 34 C
  • Operational Temperature - freshwater+1 C to + 34 C
  • Storage Temperature-30 C to + 70 C
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  • Scrubber Capacity2 kg
  • Scrubber Medium797 Sodalime (8-12 mesh)
  • Cylinder Capacity2 x 2 litre composite 30 bar
  • Cylinder Medium100% Oxygen <6 msw (training) Heliox>6 msw
  • Counterlung5 litres
Training at NHC

Training at NHC

National Hyperbaric Centre provides comprehensive COBRA training courses. Operators of Divex transfer course; whilst operators new to Divex bailout systems will benifit from the complete COBRA training course.

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SLS upgarde options

SLS upgarde options

A number of routes exist for existing operators of Divex SLS bailour rebreathers to upgrade their existing equipment in a phased manner. Exisiting operators of SLS should contact us to discuss options for upgrading to COBRA

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Watch COBRA in action during manned trials at National Hyperbaric Centre.



View, Download and print a PDS copy of the COBRA Brochure



Explore procurement and leasing options for COBRA in this downloadable PDF.


In 2015 James Fisher Defence and Divex merged to form JFD.

Today, JFD serves customers in 81 countries across six continents.

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