Stealth SC (Semi-Closed) is a mechanical underwater Life Support System (LSS) designed for Mine Counter Measure / Explosive Ordnance Disposal (MCM / EOD) operations to 54 metres using nitrox breathing gases or to 60m using a helix or trimix breathing gas.
Stealth SC is a back-worn LSS, with gas provided by a twin, two litre cylinder assembly via an adjustable constant mass flow metering valve. A demand valve automatically provides gas into the counter lungs during decent, which may also be used as a manual gas bypass valve.
Stealth may be supplied with an integrated open circuit emergency breathing Secondary Breathing System (SBS), which may be augmented by a separate eXternal Breathing System (XBS).
Highlights of the JFD Stealth SC Life Support System which
showcase the unit's versatility and capability:
60msw with Trimix / Heliox
Weight and Dimensions of the Stealth SC
Stealth SC is a modular, underwater life support system that can be tailored to suit mission requirements by using a combination of the following accessories:
Buoyancy compensation device with integral weight pockets
Bite mouthpiece and half mask
Open circuit bailout options for both bite mouthpiece and dual mode mask
Optional separate low magnetic external breathing system (XBS)
Full face dual mode mask, permitting breathing from closed and open circuit gas supplies such as XBS or special operations manned wet submersible built-in breathing system (BIBS)
Dual mode bite mouthpiece
* basic unit - dependent upon customer configuration
** Molecular Products Sofnolime® 797 grade 812 mesh
60m using trimix or heliox gases
54m using standard NATO nitrox gases
Brief excursions to a maximum depth of 6 msw on 100% O2 with short duration excursions to 15 msw (dependent upon local oxygen exposure regulations)
Breathing performance to UK HSE / EN standards
Operating temperature -20ºC to +49ºC
Sea temperature operation -1ºC to 37ºC
Freshwater temperature operation 1ºC to 37ºC
Non magnetic to NATO STANAG 2897 A / AEODP-7
Integrated oxygen partial pressure (PO2) monitor and decompression computer
Fully closed-circuit mixed gas electronically controlled constant oxygen partial pressure
Front mounted counterlungs for minimal breathing resistance
Downloadable dive log providing a detailed record of the dive
Rechargeable main and reserve battery - long life
Sealed electronics unit
Water tolerant breathing circuit and water dump systems
Oxygen sensors and circuits protected from moisture and water entry
Composite 300 bar cylinders
Backlit LCD hand display showing essential dive data
High pressure DIN fittings
Three independent oxygen sensors
Automatic "bad sensor" removal and advanced oxygen sensor voting logic
Various bailout options available
Non-magnetic and low acoustic design
The requirement to meet NATO AEODP-7 Class A (STANAG 2897) without compromise is an operational necessity. Stealth CDLSE fully meets the requirements of AEODP-7 Class A (STANAG 2897) under both static and dynamic test conditions in all attitudes and for all components that may come into contact with magnetically sensitive ordnance.
Sea mines continue to increase in sophistication; in response Stealth CDLSE surpasses the low acoustic test requirements of NATO STANAG AMP15. Stealth CDLSE functions by analysing the breathing gas and through the automatic addition of 100% Oxygen, the Partial Pressure of Oxygen (PO2) is accurately maintained at a pre-set level dependent upon the depth.
Using three independent oxygen sensors, Stealth SC's control system rapidly and accurately responds to changes in life support system status.
A Diluent gas (Air, Heliox or Trimix) provides gas volume within the closed-circuit primary breathing system, whilst Carbon Dioxide (CO2) from exhaled gas is absorbed by the scrubber unit.