Multi Role Rebreather · UK Trained & Serviced
SHARK CCR.
A Multi Role Rebreather (MRR) built for military, commercial and expedition diving from one platform. Hybrid oxygen delivery, fully redundant electronics and an aerospace-grade aluminium frame. Built to our specification in Belgium, then trained, serviced and supported here in the UK.
- Rated depth
- 100m
- Endurance, military use
- 12 hrs
- Bubble signature
- < 0.1L/min
- Servicing
- UK
Background
WHAT IS A MULTI ROLE REBREATHER?
Most closed circuit rebreathers are optimised for a single discipline. A recreational CCR is built around dive-shop logistics; a dedicated military CCR is built around covertness and little else. If you are new to the principle, our guide to how rebreather diving works covers the loop, the scrubber and the failure modes first. A Multi Role Rebreather, an MRR, is designed to cover several of those roles from one platform, so a unit does not need a different machine, a different spares chain and a different training pipeline for each task.
That is the brief the SHARK CCR was built to. The same unit supports covert military diving, technical and expedition diving to 100 metres, and underwater engineering work, without swapping platforms between roles. In practice that means the design has to hold three things at once that are usually traded against each other: a very low bubble signature, long endurance, and enough redundancy that a single failure does not end the dive.
Why the support chain matters
A rebreather is a life-support system, and its value to a unit is measured over years of service, not at the point of sale. The SHARK is built to our specification by a manufacturing partner in Belgium, and everything after that happens here: training, servicing, cell replacement and spares, handled by cleared personnel with stock held in the UK. Availability, not just capability, is usually what decides whether a unit stays in the water.
Design
THREE THINGS THAT MAKE IT MILITARY
Everything else on a rebreather is negotiable. These three are not.
< 0.1L/min
Hybrid oxygen delivery
The unit runs fully electronic, or as an mCCR on a constant mass flow valve metering oxygen at 0.5 litres per minute. Either way oxygen addition stays smooth and predictable, which is what holds the bubble signature down. On a covert approach that is the difference between a diver who is detectable from the surface and one who is not.
Redundant
Fully redundant electronics
Two independent electronics paths, plus an analogue readout of the oxygen cells that works even if the primary electronics stop entirely. A single failure degrades the unit rather than ending the dive, and on a long approach with no easy abort that graceful degradation is a hard requirement, not a feature.
Aerospace
Aerospace-grade aluminium frame
The chassis is aerospace-grade aluminium, anodised and then powder-coated, so it takes sustained saltwater exposure without the corrosion that ends most units early. It survives boat work, surf entry, obstacle crossings and the general abuse of operational use.
Data
SPECIFICATION
| Classification | Multi Role Rebreather (MRR) / Closed Circuit Rebreather (CCR) |
|---|---|
| Rated depth | 100 metres |
| Scrubber duration | 200 to 250 minutes, CE rated |
| Operational endurance | Up to 12 hours in military use |
| Bubble signature | Under 0.1 L/min |
| Oxygen delivery | Hybrid: fully electronic, or mCCR on a constant mass flow valve at 0.5 L/min |
| Electronics | Fully redundant, with an analogue cell readout independent of the primary electronics |
| Frame | Aerospace-grade aluminium, anodised and powder-coated |
| Scrubber canister | Axial, low pressure loss through the bed |
| Counter-lungs | External, quick removal for inspection and servicing |
| Configuration | Backmount |
| Weight | 23 to 26 kg fully equipped |
| Certification | CE EN14143, with no usage restriction by diver position |
| Standards | CE EN14143, ISO and BS EN |
| Manufacture | Belgium, built to LRDG specification |
| Training, servicing & spares | United Kingdom, stock held domestically |
| Lead time | 4 to 6 weeks from order |
| Price from | £10,950 (£1,950 refundable deposit) |
Each unit is built to the operator's configuration. Full technical data, test certification and configuration options are provided on request. Email info@lrdg.uk.
Deployment
ONE PLATFORM, FOUR ROLES
Military diving
Covert approach and ship's team tasks where bubble signature and endurance decide the plan.
Technical diving
Staged decompression to 100m with multi-gas procedures and long bottom times.
Expedition diving
Remote-site wreck survey and identification, where resupply and servicing are days away.
Underwater engineering
Extended in-water working time on inspection, repair and EOD-adjacent tasks.
Through-life
TRAINING &
SUPPORT
A rebreather is only a capability if the people using it are current on it and the unit stays serviceable. We deliver both ourselves rather than subcontracting them.
CCR conversion and operator training is delivered by our own instructors, at a discount when bought alongside a unit. Annual servicing, cell replacement and spares are handled in the UK. Trial dives on the SHARK can be arranged before any commitment.
Conversion training
Open-circuit and cross-platform CCR divers converted onto the SHARK by instructors who dive it operationally.
Unit packages
Whole-team training built around the unit's tasking, delivered to JSP 804 Defence Diving Standards.
Maintenance & spares
UK servicing, cell replacement and domestically held spares. No foreign dependency in the support chain.
Questions
SHARK CCR FAQ
What is a Multi Role Rebreather (MRR)?
A Multi Role Rebreather is a closed circuit rebreather built to cover more than one operational role from a single platform, covering military diving, technical and expedition diving, and underwater engineering, rather than being optimised for one discipline. The SHARK CCR is configured for that multi-role use, which is why it carries hybrid oxygen delivery and fully redundant electronics.
What makes the SHARK a military CCR?
Four things matter operationally: a low bubble signature, endurance of up to 12 hours in military use, an aerospace-grade aluminium frame that survives sustained saltwater exposure, and redundancy that lets the unit stay in service after a single failure. The SHARK carries an analogue cell readout that works independently of the primary electronics, and it is CE certified with no restriction on diver position, so it functions whatever attitude the diver is in. Servicing and spares are UK-based.
What depth is the SHARK CCR rated to?
100 metres.
What is the scrubber duration of the SHARK CCR?
The CE rated scrubber duration is 200 to 250 minutes. In military use, at the profiles and water temperatures those tasks actually run at, the unit is worked up to 12 hours. The canister is axial, which keeps pressure loss through the bed low and makes packing and inspection straightforward.
How much does the SHARK rebreather cost?
The system starts at £10,950, with a £1,950 refundable deposit to begin a build. Unit and MOD pricing is quoted separately. Contact info@lrdg.uk.
Where is the SHARK CCR made and serviced?
The unit is built to LRDG specification by a manufacturing partner in Belgium. Training, servicing, cell replacement and spares are all UK-based, so the support chain sits here rather than overseas.
Can I train on the SHARK CCR?
Yes. We deliver CCR conversion and operator training through our own instructors, at a discount when purchased alongside a unit. Trial dives can be arranged before purchase.
Next step
SPEC YOUR UNIT
Every SHARK is built to the operator's configuration. Tell us the role and we will come back with a specification, a price and a delivery date.