Saturation Diving Systems

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Saturation Diving Systems

Our Saturation Diving Systems are portable, 12-mansystems built to endure 1,000 feet of sea water. Theyare designed and built in accordance with applicablerules and regulations required by ABS, ASME, PVHO,and IMCA.

Saturation diving systems provide life support and withredundant essential components designed into oursaturation diving systems, IUC provides divers a safeand meticulously managed working environment. Oursystems feature state of the art dive bell launch andrecovery systems, hyperbaric rescue chambers, andstainless steel, multi-chamber sanitary systems.Saturation dive system communications have to performin the event of a total power failure. IUC employsexplosion proof, sound-powered telephones throughouttheir saturation dive systems and the speakers voice isall that is needed for them to work without appliedelectrical power or batteries. Each deck chamber is

equipped with Built In Breathing Systems (BIBS) to administer emergency breathing gas to the divers in saturation. The

exhaled gas is dumped or discharged outside of the chamber, preventing unwanted changes in the hyperbaric environment.

We employ a modular system design for flexible installation, accommodating split-level operations and configurations for divebell launch in a moon pool or over the side, permitting effective mobilization onto virtually any style ship or barge.

We build the most current designs for convenience, comfort and safety into our saturation system chambers that includestrategically located 4 and 8 viewports; aluminum flooring rubber shock mounted for sound damping, Styrofoam insulationwith aluminum jacketing and weld-buttons for mounting user accessories. Our saturation dive systems are designed towithstand the challenging offshore environment. All IUC deck chambers are finished with 3-layers of PPG Aquapon 35Polyamide-Epoxy Gloss, a tough, marine grade interior & exterior finish.

All System components are properly outfitted with lifting lugs,specifically located for safe and efficient transport and deployment.Medical supply locks permits safe supply transfers between personneloutside and inside the system chambers. A closed circuit television(CCTV) system monitors the divers, both in the system chambers andin the water, to enhance diver safety and supervise project progress.System fluid and gas connections are made by means of 6000 and9000 psi class 304 stainless steel couplers and through fittings.

6 Man Double Lock Deck Decompression Chamber

The 90OD x 18 OAL DDC is a double lock hyperbaric chamber thatconserves valuable deck space by combining a main lock, thatprovides living quarters for six divers, with a Transfer Under Pressurechamber. Diver comfort is built into the DDC, with 3 sets of generouslysized (66 X 27), powder coated bunks with mattresses, lights,privacy curtains, tables and shelves. The chamber environment iscontrolled by a fully redundant system that regulates all theenvironmental parameters: pressure, temperature, humidity, andbreathing gases at the control van, LST console. The DDC is equippedwith 28 ID studding and flanged outlet manways that are protected by304 stainless steel overlays on the sealing face. The DDC has ring anddish style doors, featuring a 304 stainless steel ring with dogginglatches.

HRC Launch System & 6 Man DDC / 12 Man HRC

The HRC Launch System is required to launch the HRCoverboard in the event of an emergency forcing the crew to

abandon ship. The System consists of a stand-alone launchframe into which the HRC is located and the frame may besituated either at the stern or the side of the ship. The HRCLaunch System can be operated by means of the HPUhydraulic pumps or by compressed air operated hydraulicmotors, in the event of black ship conditions, when noelectrical power is available.

DDC/HRC - This multipurpose chamber performs double dutyas a 6 man DDC and a 12 man HRC. It measures 90OD x10 OAL and can be configured in line with or at right anglesto other chambers to accommodate several installationarrangements. As a DDC, the chamber environment iscontrolled by a fully redundant system that regulates all theenvironmental parameters: pressure, temperature, humidity,and breathing gases at the control van LST console. It is

equipped with 28 flanged manways for integration with the DDC/TUP.

As an ABS classed Hyperbaric Rescue Chamber, it is designed to evacuate up to twelve divers, with twelve full seatharnesses, approved safety helmets and a structural steel crash frame. The HRC is designed and fully tested for safe

launching, buoyancy and stability, in accordance with SOLAS, IMO Code of Diving and IMO Life-Saving Appliance Code. TheIUC HRC has everything needed for post-launch survival and recovery. It has 72 hours of on-board breathing gas and 48hours of battery power. An Emergency Position Indicating Radio Beacon, a RADAR reflector, and emergency signs greatlyenhance the HRCs probability of discovery after launch. The HRC is furnished with lifting slings, towing lugs with cableharness at one end and a towing bridle for successful recovery.

IUCs handling system

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The Bell Handling System consists of a Bell Wire Winch, A CTWinch, an Umbilical Winch, Bell Launch and Recovery System(LARS) Assembly, and a Hydraulic Power Unit (HPU). The BellHandling System provides the facility to launch and recover theBell including provisions for Umbilical cable handling. IUC usesonly the worlds most reliable bell handling equipment that is infull compliance with IMCA (International Marine Contractors

Association) guidelines. These systems can be configured tosuit both over-the-side and moonpool layout.

The Bell LARSis a stand-alone structure that is equipped withbell & wire sheave assemblies, bell interface plate, umbilicalroller track, main skid and air operated bell trolley that can belocated either at the stern or the side of the ship. It launches,supports and recovers the Bell and Clump Weight. The BellLARS raises the Clump Weight from the deck, moves the Bell

from the Transfer Under pressure Chamber (TUP), transportsthe Clump Weight and Bell, supports the Bell, Umbilical cableand Clump Weight during deployment, and transports the Bellback to the TUP and the Clump Weight back to the deck.

The Umbilical Winchdeploys and recovers the Umbilical Cable, providing services to the Diving Bell. It is furnished withspooling guide pads that assist the layering of the Umbilical Cable onto the drum. The brakes are the fail-safe hydraulic type,applied by spring and released by hydraulic pressure. A spooling gear assembly is provided to facilitate neat layering of theumbilical cable and minimize the risk of damage.

Bell Winchdeploys and recovers the diving bell. It has been designedto have a safe working load of nearly 11 Tons. A spooling gear

assembly is provided to facilitate neat layering of the bell wire andminimize the risk of damage.

Constant Tension (CT) Winch is for launching and recovering theClump Weight. The CT Wire system is used to control the rotation ofthe Bell and down current drift. In the event of the failure of the BellWire Winch, the CT Wire Winch may be used to recover the DivingBell.

Hydraulic Power Unit (HPU) supplies hydraulic fluid at the requiredpressure and flow for each component of the Diving Bell Launch andRecovery System. The HPU includes an emergency hydraulic supply tolaunch the HRC if there is a total loss of electrical power to the HPU.Theemergency system includes two off air powered hydraulic pumps,

mounted directly onto the oil reservoir. The emergency pumps are Heypac air powered fixed displacement pumps, poweredby air provided from the compressors on the ship or ships air. In the event of a failure of both hydraulic pumps or a failure ofthe electrical supply to the HPU, a system of compressed air operated hydraulic motors is provided.

The IUC Submersible Diving Bell

The IUC diving bell is an IMCA compliant and ABS designapproved 3 diver system; the bell is a 76 ID spherical pressurevessel with an 18 shell section. The diving system can safelyoperate up to 1000 feet of seawater, providing life support,environmental comfort and transportation to the underwater jobsite. Diver safety is our first concern, so an IMCA compliantMARA Bell Panel designed for onboard gas managementsupplies normal breathing gas and protects the divers against lossof surface supplied gas or a severed diver's umbilical byautomatically supplying on board emergency gas to the divers.Redundant carbon dioxide scrubbers, Lexmar 2 diver gas reclaimpanels and hot water heaters further protect the diversenvironment for safety and comfort.

Reliably delivering environmental safety and comfort is only half ofthe task; maintaining them in a dive bell presents uniquechallenges. IUC uses Syntactic foam for thermal insulation toinsure diver comfort and safety. Syntactic foam insulation featuresoutstanding thermal properties and buoyancy. Although the divebell is protected by an ABS design approved crash frame, the use

of Syntactic foam insulation further supplements the bellscorrosion system and protects from minor abrasions that mayoccur during normal use.

Communication among the divers and support personnel is vital;with this in mind, IUC uses a hard-wired communications system with primary and secondary helium unscrambling and noisereduction processors. Leaving nothing to chance, IUC provides a through-water back up communication system as anemergency communications link between a diving bell and support personnel in the case of a severed umbilical cable or lossof wired main communications. The dive bell is furnished with internal and external lights that are backed up with an onboard24 VDC auxiliary power supply. IUC uses only ABS certified electrical penetrators and connections. The umbilical cables arethe crucial physical links between the diver and the surface; they are ABS certified inclusive of breathing gas hose, reclaim,communications, power, video signals, and hot water. The IUC dive bell is furnished with two 50m diver excursion umbilicalsand one 55m standby diver umbilical located on the exterior of the bell for quick deployment.

Safety and durability are the driving characteristics of the diving bells flanges, for the Man-way doors are clad in 316 Stainlesssteel SA 516 GR 70. On the surface, the dive bell mates with the TUP by way of a 28 ID, 300 class ABS certified Tube Turnscoupling closure. The lower opening is a 31 ID man-way and protected by a 3

04 stainless steel overlay on its sealing face. The bottom bell door is IMCA compliant, 31 diameter 304 stainless steel,easily operated by an internal ABS approved hydraulic door cylinder system.

The IUC dive bell is protected against the unlikely possibility of a failure of the bell recovery system or a black ship condition. Ifit were ever necessary to make an emergency recovery of the bell, IUC has four distinct back up recovery systems in place.

Main winch failure The dive bell is recovered to the surface and locked into the docking head with the use of the CTwinch. Main winch and CT winch failure- The dive bell is recovered to the surface with the umbilical winch and landed on thedeck using chain fall from the A-Frame. All winches fail- The divers release the ballast weights and make a buoyant ascent to the surface, the bell is placed on


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the deck using Chan fall and A-Frame. Black ship scenario (including failure of the standby generator) - The HPU is driven by onboard gas and manuallyoperated at the HPU to recover the bell.

Dive and Saturation Control Van

The IUC control van is an ABS classed, custom specified, air conditioned,portable enclosure that is the saturation system management hub, wherelife support personnel monitor and regulate chamber environmental,Flyaway, Surface Dive, Dive and Bell, Diver Gas Reclaim, and BellServices control panels to manage every aspect of the divers living andworking environments. All of the saturation systems operations andchamber environments are controlled with individual panels that have beendesigned with gauges and controls purposely grouped for logical, easyoperation. IUCs chamber control panels are equipped with carbon dioxideand oxygen analyzers for precise breathing gas monitoring. Each control

panel includes specific video system controls for observing bell operations,chamber activity, or surface dives. The individual control panels are easy toread with clearly indicated gas routing and device function labels. Thecontrol van is equipped with helium un-scrambler communications sets, with sound powered and through water back upcommunications.

Diver Gas Reclaim Van

Is ABS classed and fully insulated portable enclosure, with split AC 5000 BTU cooling and heating that houses a Quincy twostage compressor, dedicated for blow down on initial chamber presses. The Quincy compressor is designed to run moreefficiently, cooler and cleaner, resulting dependable and consistent gas delivery. Gas reclaim van also houses an ABS andDNV compliant LexMar Divers gas reclaim unit that scrubs CO2, traps water, and filters bacteria and micro particles. Thereclaim unit incorporates a surface processor, booster & electronic control units that are mounted on a purpose built deckmounted skid. The booster is controlled via a PLC system complete with integrated alarms. The PLC is also fitted with anEPROM that will automatically re-set the PLC in the event of a power failure. The booster is capable of supplying 200LPM tothe divers at a maximum depth of 300m (factory tested); however the unit is tested and approved to meet the DNVrequirement of 135LPM for two divers at 300m. The gas management panel, located in the control van, is fitted with CO2 andoxygen analyzers that monitor the outgoing gas through the processor; the panel also controls the oxygen injection and theinitial pressurization of the system.

Equipment VanIs ABS classed and fully insulated portable enclosure, with split

AC 5000 BTU cooling and heating that houses an ABS compliant,LexMar dual diver hot water unit (100% redundancy) to supplydivers at depth with hot water at a fixed temperature so that thebody temperature of the diver stays constant. The hot water unitcan be variably adjusted to suit the temperatures at variouslocation and depths. Heat loses through the umbilical to the divingbell, can be compensated for by controlling the temperature of thehot water at source. As a safety feature the machine is controlledby a safety thermostat which has been pre-set to 70C to preventscalding. Temperature of heated water is controlled via a 3-wayelectro-mechanical valve which has an accuracy of 1C and canactuate within 10 seconds. The valve can also be controlledmanually as well as remotely.

The equipment van also houses three ABS compliant, HyperbaricEnvironmental Control Units, which condition the hyperbaricenvironment for the well-being and health of the inhabitants within

the chamber, up to a depth of 300MSW. These units are coupled with the Chamber Conditioning Unit (CCU) situated insidethe chamber. It controls the temperature and humidity of the chamber environment. The system (HECU & CCU) consists oftwo main utilities that work in separate chilled and heated water streams. This allows for a temperature exchange between thechamber atmosphere and the chilling / heating coils in the CCU, thereby controlling the temperature and humidity. The HECUunit is designed to operate automatically and can be controlled remotely or manually.

The IUC equipment van is outfitted with a Haskel custom breathing system that mixes gases and transfers He & O2. Domestichot water is handled by a Hubbell water heater is specifically designed for marine use and is in USCG conformance and is

ABS approved. Using deck and bulkhead mounting supports, the water heater is securely fastened to the ship structure,providing a safe and sturdy installation. For longevity, the tank is constructed of steel and internally lined with speciallyformulated hydrastone cement. The hydrastone cement lining, solid copper-silicon threaded tank openings and a built-in heattrap device ensure a long lasting, energy efficient water heater that is resistant to hot waters highly corrosive nature.

Electrical Equipment Van

A space saving, 10 X 10, ABS classed insulated portable enclosure houses the Automatic Transfer Switch. If there is a lossof the ships electrical power, the automatic transfer switch engages a dedicated 250kW, , 402HP ABS certified, John Deeregenerator to energize the entire system.

Flyaway Van

The Flyaway Van attaches to a recovered Hyperbaric Rescue Chamber. It is housed in an ABS classed container, and can beplaced either on a supply vessel, on a dock or a barge, depending on the operational requirements. The equipment includes aControl Panel, a Gas Pressure Reduction Panel and an O2 Deck Distribution Panel everything necessary for a safe workingenvironment. The unit also includes a Hyperbaric Environmental Control Unit that supplies cold and hot water to control theHRC chamber environment. The saturation control panel provides HRC pressurization/depressurization and monitors theenvironmental conditions, including oxygen supply and make up. Connections between the HRC and Flyaway van are madevia ABS certified hoses and electrical cables.


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Saturation Diving Systems