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The next best thing to gills

The Nautilus is a state of the art Closed Circuit Rebreather (CCR), that has been produced with four essentials in mind:  performance, ease of operation, affordability and safety. All of which deliver a highly reliable and responsive CCR.

This is the next evolution in diving. The fully closed circuit design allows for a far more personal connection to the underwater world. The operation of the unit is virtually silent and without bubbles. By maintaining a constant partial pressure of oxygen, the Nautilus allows for a dramatically increased dive time, less decompression obligation, reduced surface intervals, and less fatigue following a dive. 

The future is here.

Advantages of the Nautilus CCR

No external electrical connectors


Fiber optic light tubes transmit information from the electronics pod to the primary and secondary displays at the console. Magnetic switches are used for both on-off and calibration functions. These design elements eliminate the need for any external electrical connections. This eliminates the potential problems encountered when salt water and electrical components come in contact.
Isolated battery compartments


The only electrical components in the breathing loop are the O2 sensors.
The batteries are located in separate one atmosphere compartments.
This eliminates the potential problem of battery voltage leaking to the O2 sensor which, in turn, would feed erroneous information to the O2 solenoid controller and the displays.
Display and control console
The console incorporates the following:
PRIMARY DISPLAY - current performance of the unit against the desired setpoint.
SECONDARY DISPLAY - current reading of each O2 sensor.
O2 PRESSURE GAUGE - remaining amount of Oxygen.
DILUENT PRESSURE GAUGE - remaining amount of Diluent.
O2 ADDITION VALVE - allows manual addition of Oxygen in the loop.
DILUENT ADDITION VALVE - allows manual addition of Diluent in the loop.

The console allows the operator to check the complete system status and make any desired changes in the PO
2 on a single location.
Constant display of each oxygen sensor
This provides the operator with an instant check of each of the three O2 sensors.
User selectable O2 setpoint featurE
This allows the operator to select an O2 setpoint of 0.7, 1.0, 1.2, 1.3 or 1.4 ATA (atmosphere).
Automatic shallow water setpoint
The Nautilus automatically selects a setpoint of 0.7 ATA O2 at depths shallower than 18fsw. This feature prevents the unit from continuously trying to add O2 into the breathing loop to reach a setpoint in excess of 1.0 ATA while the unit is switched on at the surface.
Push button calibration
This feature allows the operator to calibrate the electronics facilitating sytem pre-flight and ensuring optimum performance.
User replaceable batteries
The Nautilus has two separate one atmosphere battery compartments.
Each contains two standard 9 volt batteries in parallel. One set of batteries powers the primary display and solenoid; the other set powers the secondary display.
Automatic gas addition valves
The oxygen is controlled by the primary electronics and a low power consumption solenoid. The diluent is controlled by a hydrostatic differential pressure valve located in the intake counterlung.
Split back mounted counterlungs
Split counterlungs help reduce the WOB (Work Of Breathing) and also allow the gas to spend more time in the scrubber to remove CO2. By locating the counterlungs on the back, the chest area is kept open for other items like cameras, video equipment, lights etc.
Integrated bail-out system
The Nautilus provides an integrated regulator on the wings inflator. With this, it is not necessary to carry a separate cylinder of gas for the open circuit bailout during shallow dives or it can also work as a backup bailout.
Incorporated buoyancy wings
The wings supplied with the Nautilus are attached directly to the backplate; they are not part of the harness. They supply 40 pounds of lift when the breathing loop is completely flooded.
Protective housing
All bio-system components are located inside a protective housing. The housing is made from a color impregnated resin that is resistant to scratches and abrasions.
Harness and padded back pad
The harness supplied with the Nautilus has two shoulder straps, one chest strap, one torso strap, and two crotch straps. It is designed to fit people between 2.5 and 97.5 percentiles. The back pad and harness are attached directly to the backplate and not to the buoyancy wings, offering more durability and comfort.
Incorporated trim weight capability
There are two weight cavities that hold up to 16 pounds in the backplate to which standard belt weights can be added to adjust the buoyancy and trim of a specific diver requirements.
Twin 19 cubic foot gas cylinders
Two 19 foot, United States Department of Transportation approved, aluminum gas cylinders are provided.
Radial flow canister
The radial flow canister, as compared to an axial flow canister, provides a lower WOB (Work Of Breathing) and increased scrubber efficiency.


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