info@narkedat90.co.uk

 

DEEP PURSUIT LOGO

...Rebreather controller

Its here...

The most comprehensive and fault tolerant rebreather controller upgrade for the APD Inspiration Classic..

Down load the latest manual HERE 

or visit out mini site HERE

Design principles

The Deep Pursuit was designed and built to exceed the requirements of the most demanding rebreather diver.

DEEP PURSUIT ALTUS

deep pursuit full set up

Below is list of only some of the features we have built in to the Deep Pursuit rebreather control system. Producing a setpoint controller wasn't enough for us, we demanded a stable power supply system, fault tolerance and redundancy as well as a full feature set.
The 'Deep Pursuit' comes in only two forms, the standard unit and the 'Altus'. The Deep Pursuit has setpoint controller, full trimix on-line decompression, and a HUD.
The 'Altus Pursuit' is our top-flight system which has an increased depth limit and a tertiary redundant system with a second handset with or without full decompression. Altus systems are expected to be used only by the top 0.1% of rebreather divers and are available by special order only.

Features

  • Buhlmann algorithm or 'V' Planner Live ® with user configurable gradient factor conservatism
  • Truly separate power supplies for the controller handset, HUD and solenoid
  • Automatic switch-on by depth and/or pressure
  • Adaptive PID setpoint control with user configurable algorithm
  • User serviceable wiring loom
  • ‘Single moving part’ failure tolerant and user serviceable solenoid that was designed for oxygen service
  • Automatic ambient light sensing LCD illumination
  • Built in 4th cell holder
  • Fully independent HUD with three cell real time and simultaneous PO2 indication
  • Total control automatic calibration system
  • Configurable automatic or manual setpoint changeover
  • Set point is controlled and sensors displayed while in menus
  • The Deep Pursuit handset crush depth exceeds 185 meters, head has no limit
  • 5 open and 5 closed circuit user programmable gases, switchable during a dive
  • No lockout
  • Battery life of up to 360 hours
  • Millivolt display for all cells ‘on demand’
  • Easy oxygen cell replacement
  • Robust, single billet manufactured head
  • Critical components protected in the event of a flooding
  • Solenoid failure detection system
  • End user updateable firmware via infra red interface

Technology...

DEEP PURSUIT FLOW

 

 

 

 

 

 

 

Narked at 90 has invested more than half of its revenue back into R&D. Our state of the art in-house design and manufacturing ensures that every component is personally selected to exceed the standards our customers have come to expect from the technical diving industry. 3D modelling and flow dynamics are a cornerstone to our design. There is no room for guesswork. Our customers are pioneers, not beta testers.

The centre piece our controller system is the head which is machined from a single billet of Delrin. Dimentional accuracy is guaranteed by CNC manufacture and a rigourous inspection regime.
Inside the head are three cavities populated by the cells, HUD and the solenoid. The handset being in its own 1ATM housing provides the failure tolerance you demand in critical equipment.
Even a full flood of the system will only result in wet oxygen cells and wiring. The cell wiring loom consists of three cables terminated at each end by an SMB connector, all connectors are 24k gold plated to resist corrosion. These cables are user replaceable in seconds which means that even a full flood will only result in the cells and three cables to be replaced to have your system as good as new. Considering the remote places that technical divers travel to, we can keep you in the water. Can any other system make such a boast?
Repacing the cells is simplicity itself, building on the design of the hugely successful 'Beanie holder', the same system was employed allowing the cells to be easily removed by pulling out the entire cell holder.

The driving force behind the Pursuit systems is the Shearwater electronics suite. Recently redesigned, the Pursuit is proving to be the most intuitive and reliable electronics available for rebreathers. Narked at 90 has a special relationship with Shearwater Research that allows us custom programming to perfectly match the Pursuit computer with our system. No other electronics system has automatic back lighting that adapts to ambient light or user customizable setpoint algorithm.
The Pursuit has a communications port that allows the user to remote update his computer at any time, this means Narked at 90 can send updates to customers without depriving them of their diving equipment when we improve or add functionality to the system.

The HUD...

DEEP PURSUIT HUD

The Head Up Display on the Deep and Altus Pursuit is primarily an independent PO2 monitor. When we say independant, we really mean it. Power supplies, physical compartment and calibration are all separate from the controller or any handset. This means that a single handset and HUD gives you complete redundancy.
Before explaining the display of the HUD, we would like to explain that there are "bad" alarms and "good" alarms. For example a fire bell is a bad alarm. It is bad because the absence of a ringing bell doesn't mean there is no fire. It just means the alarm isn't ringing. The fire bell may not be ringing because the battery is dead or the smoke detector isn't in the right place ........
It doesn't mean that everything is ok.
A good alarm is one where there is an obvious difference between the lack of function and the lack of an alarm. A solid green light doesn't do that so we didn't use one.

In order to be a PO2 monitor, we must be able to read actual PO2 from the device. LED's have been used before to display PO2 by flashing to correspond to the sensor output. Using one LED means we have to wait and remember a sequence that must happen three times before we can make a judgement. The three LED's on the Pursuit indicate the PO2 simultaneously and in time with each other. This gives us a clear indication of both the PO2 and any deviation without having to do much thinking.

The LED's are tricolour and indicate one green flash for each point above a PO2 of 1.0 and one red flash for each point below 1.0

The LED's are tricolour and indicate one green flash for each point above a PO2 of 1.0 and one red flash for each point below 1.0

Safety...

DEEP PURSUIT CELL CONNECTIONS

When selecting components to be incorporated into the "Deep or Altus Pursuit" we wouldn't settle for 'off the shelf' components from the cheapest supplier, we insisted on the right components for the job regardless of cost. Our solenoid is designed for use with pure oxygen in a pure oxygen environment. The only one of its kind that we are aware of that is certified for this purpose and supported by the manufacturer specifically for use in a technical rebreather. The failure mode of this valve is in the closed position, reducing the risk of an oxygen toxicity hit at depth. User serviceable without tools using inexpensive parts.
Every conductive part used in the head enclosures have been plated in 24k gold. All cables and connectors are gold plated and user replaceable. This reduces any possibility of a premature failure from oxidization, a common fault in other units and an ongoing cost in respect to a yearly service. All electronic components are protected from corrosion

Selecting components that exceed the performance of any other is not enough, we need to be doubly or triple sure that you have the necessary tools to be safe regardless of the circumstances that you encounter. That is why you get double redundant PO2 monitoring with true independence as standard, apart from the oxygen cells, no independent system shares resources with any other.
The "Altus Pursuit" benefits from triple redundancy as the two handsets and the HUD are truly independent. The primary handset runs setpoint control and gives 'real time' decompression, the HUD gives real time PO2 and the second handset mirrors the primary in all aspects except solenoid control.

The saying goes that we are more that the sum of our parts, and this can also be said for the "Deep Pursuit". All critical systems are encased in their own hermetic compartments. Accidental and catastrophic ingress of seawater cannot migrate from one compartment to another. Independance should be a philosophy, true and defined and not limited to just wiring or logic. The same philosophy has been applie to the most critical of  any ECCR, the Power supplies;
All systems (Controller, HUD and solenoid) have their own independent power supplies. No loss of any single power supply will lead to the diver not knowing his PO2. and just to make sure that we have all the bases covered, and to give you a choice, every Pursuit system is fitted with a fourth cell holder as standard. 

Pricing...

package 1   £2000

x1 Deep pursuit controler with full trimix and head

x1 Heads up display

 

Package 2   £2700

x1 Deep pursuit controler with full trimix and head

x1 Secondary display only handset

x1 Heads up display

 

Package 3 £ POA

x1 Altus Pursuit controler with full trimix with extended depth capabilitys

x1 Altus Pursuit secondary with full trimix with extended depth capabilitys

x1 Heads up display

x1 Head

CONTACT: BRENT HUDSON 

                    JOHN ROUTLEY

 

Narked at 90 ™ 2004©

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