6 Man Saturation System

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PROFESSIONAL DIVING CENTRE 6 MAN SATURATION SYSTEM

The PDC Humming Bird saturation system is a small footprint, rapid deployment, portable 6-man saturation system that is fully compliant with IMCA D024 and achieves practical compliance with IMO A17/Res 692.

6 Man Saturation System at PDC Commercial Diving School

6 Man Saturation System at Professional Diving Centre Durban

The system is ideally suited for Civils Work or Diver Training as the system had worked in the oil & gas industry successfully before. It was used in the Oil & Gas Industry for construction support and IRM work and provided an efficient, safe and cost-effective alternative to larger systems and dedicated Dive Support Vessels. The owner of PDC Grant Jameson supervised on it in 2009 while it was working offshore in the oil & gas industry and bought it when the company upgraded to a 9 man system.

GENERAL DESCRIPTION AND LAYOUT
The system is rated and equipped for saturation diving to a depth of 150 msw.

The PDC 6 Man System comprises of:
Main Lock (ML):
Fully outfitted, and ready for connection to the other components. Inside diameter : 2,000 mm
Overall length : 5,460 mm
Manways (3) int. diameter : 620 mm
Max. working pressure : 150 msw
Capacity : 4 divers, plus 2, if required during decompression Food/medical lock
BIB’s masks for therapeutic mixes
Caisson gauge
Emergency scrubbers
Internal fire extinguishers
Hyperbaric lights, main and individual bunk lights
Entertainment system
Complete communication systems (main and emergency with full redundancy) Internal environmental control system
4 bunks (+ 2 emergency bunks)
Surveillance CCTV

Transfer Lock (TL):
Fully outfitted, and ready to operate. Inside diameter : 2 000 mm
Max. working pressure : 150 msw Viewports
BIB’s masks for therapeutic mixes Caisson gauge
Emergency scrubber
Internal fire extinguisher Hyperbaric lights
Complete communication systems (main and emergency with full redundancy) Internal environmental control system
1 toilet with safety device/hand basin/shower
Corrosion resistant coating
Surveillance CCTV

6 Man Saturation System at PDC commercial diving training

Vertical Living Chamber / Hyperbaric Rescue Craft (VLC/HRC):
Fully outfitted, and ready for connection to the other components.
The complete assembly with Launch system weighs 13.1T. The HRC alone weighs 10.1 T. This chamber is the designated, outfitted as a Hyperbaric Rescue Craft (HRC). It is designed to be rapidly uncoupled from the main system and
launched off the stricken vessel. Included with the system is a Hyperbaric Rescue Control Van ( LSP Life Support Pack ) that enables topside personnel to control the decompression of the divers in the HRC from their storage depth to the surface in a safe and controlled manner, in the event the system is deployed.

This HRC achieves practical compliance with IMO Resolution A17/Res 692. Inside diameter : 1,950 mm
Overall length : 3,280 mm
Max. working pressure : 150 msw

Capacity : 8 divers
Food/medical lock
BIB’s masks for therapeutic mixes Caisson gauge
Emergency scrubbers

Living chamber for two divers
Integral deployment seats (8) and certified harnesses
Internal fire extinguisher
Hyperbaric lights, main and individual bunk lights
Complete communication systems (main and emergency with full redundancy) Internal environmental control system
Corrosion resistant coating
Complete onboard gas system ( self contained for 72 hours)
IMO compliant life support system and personal survival packs including, lung- powered scrubbers (for 8 men)
Toilet and shower
On board power supply
Surveillance CCTV

6 Man Sat system

6 Man Saturation System at PDC

Submersible Decompression Chamber (SDC) (Bell) :
Fully outfitted, side-mate bell:
Inside diameter : 2,000 mm
Height (overall) : 2,500 mm Diameter (overall) : 2,360 mm Maximum rated depth : 150 msw Weight (approx) : 5,000 kg fully fitted Capacity : 2 divers
Working Pressure : 15 bar
Test – 22.5 bar : Retest Hydro 22.5 bar
Internal volume : 3.381 m3
Positively buoyant with maximum load, without drop weights
All penetrators in stainless steel
Painted and corrosion proofed
On board gas storage, O2 make up and bottom mix, as per IMO: 7 x mixed gas 50 litre onboard gas cylinders
1 x 50 litre oxygen storage cylinder
Diver’s gas reclaim
Complete gas system (gauge, bibs, O2, etc)
CO2 scrubber
Full remote gas analysis (O2 and CO2)
Electrical and communications system (main and emergency) Nautronix “through-water” communications
External lighting (3x250w)
Internal lighting (2x20w)
Surveillance CCTV
On board power supply
Personal survival packs and lung-powered scrubbers Emergency services “plug-in” panel

Submersible Decompression Chamber (Bell) 1 Submersible Decompression Chamber (Bell) 2

System Skid Frame
The main living chamber, TUP, LARS and SDC are incorporated on a single large steel frame skid. This framework was designed in order to lift the complete system or to enable the system to be broken down into components. The frame is strongly built and rigid in order to remove any deck anomalies on the vessel which eliminates mating problems.

System Skid Frame

A- Frame

A hydraulically operated A-frame brings the centerline of the bell from its mated position to about 1.2m overboard the vessel.
One sheave for the bell wire and one sheave for the umbilical handling are fitted on top of the A-frame, as well as two sheaves through

which the clump weight wires are reeved. The A-frame also houses the umbilical retrieval spooling device.

CCTV Surveillance
Video cameras are fitted at various strategic locations on the system to ensure personnel and equipment safety at all times. All video data
is recorded via a digital multiplexer. Specifically, the following critical components of the system are monitored:
HLC internal
TUP internal
HRC internal
SDC internal
Main bell wire winch
A Frame and main bell umbilical
HLC med lock
HRC med lock
Bell trucking clamp
HRC trucking clamp
Bell Trolley and Bell Clamping System
A trolley supports the bell when on deck: The bell is lowered onto the centre of the trolley. The trolley the moves hydraulically into position
for mating onto the TUP.

Bell Winch
Capable of rising/lowering the SDC (Bell) in air
S.W. load : 12. T
Line speed (hoisting) : 20 m/min in water 10 m/min in air
Approx 300m Wire rope : 26 mm diameter, non rotating
Drive : One electric hydraulic pump for normal service, One air driven hydraulic pump for emergency service (minimum
free air requirement, 16 m3/min at 7 bar)
Brake : Hydraulic primary brake & mechanical band brake on the drum, hydraulically operated.

Hydraulic Power Pack
The hydraulic power pack for launching the bell comprises:
Two (2) 30 kW motor/pump assembly for winches
One (1) 15 kW motor/pump assembly for services
One (1) 30 kW motor/double pump assembly for emergency backup

Bell Launch and Recovery Console
The launching control console includes the following: Bell winch : hoist/lower
Clump Weight winch : hoist/lower
Bell trolley : in/out
A-Frame : in/out
Umbilical Sheave : in/out

Main Bell Umbilical
The Main Umbilical is housed in a purpose built deck frame. The main bell umbilical is supplied with the following services: Gas supply lines to bell and divers
Hot water supply
Gas Reclaim
Bell atmosphere analysis
Pneumofathometer
Power
Video
Hard wire communications
The system is supplied with a spare main bell umbilical.

Diver’s Umbilical
The diver’s umbilical comprises the following: Main gas supply
Reclaim
Video
Hot Water
Pneumofathometer
Hard wire communications
The bellman’s umbilical is not fitted with reclaim or video services.

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Control Van (Insulated and Air Conditioned)
Control van (Standard ISO container 20′, Mass 5.1T ) comprising:
Life Support and Dive Control
The chambers, VLC, TL and Dive control console includes the following

Gas Management Panel
In this panel the pressure of all gases coming from the HP storage is reduced to the required value and the gases are then distributed down stream as required.
he following HP lines enter the panel:
Air
O2 (Pressure reduced at cylinders) HeO2 mixes

Sat Control

Sat Control

Saturation Control Panel
The chamber control panel, for both the HLC and HRC, includes: Four (4) 10″ depth gauges accuracy 0.25%
One (1) 14″ decompression gauge
One (1) 6″ trunking gauge
Blowdown and exhaust valves
Metabolic oxygen make-up system
Valves for supply of therapeutic mixtures to the BIB’s. Three (3) communication system (with 100 % redundancy) Four (4) monitors for CCTV system
Full gas analysis
Hi/Lo pressure and temperature a

Dive Control in 6m Container with Sat Control

Dive Control in 6m Container with Sat Control

Dive Control Panel
The dive control panel comprises:
One (1) 10″ depth gauge for the bell external pressure
One (1) 10″ depth gauge for the bell internal pressure
One (1) 10″ depth gauge for the diver
One (1) 10″ depth gauge for the bellman
One (1) 6″ trunking gauge
Separate for each diver 3 breathing mix pressure gauges and control valves Blowdown and exhaust valves
Three (3) communication systems, with speech unscramblers (including a through water communication system)
Diver’s hat-mounted video control, monitoring and recording facilities c/w full redundancy
Monitor for CCTV system
Two (2) oxygen analysers for Diver Gas analysis
One (1) CO2 analyser for Bell Atmosphere analysis
One (1) O2 analyser for Bell Atmosphere analysis
One (1) CO2 analyser for Gas Reclaim analysis
One (1) O2 analyser for Gas Reclaim analysis
Gas flow alarms on the gas reclaim
DP alarms
Hotwater alarms

Machinery Container
The machinery Van is a Standard ISO container 20′, Mass 6.0T.
This container is usually installed below the control van and includes the following: Electrical Panels
One (1) power supply line is provided from the ship’s generator to the diving system. Another backup power supply is provided from a dedicated back-up generator.
Main supply to the Saturation System main switchboard for non essential services is 440v, 60Hz, 3 phase.
Main switchboard (non essential services) distribution panel
Emergency switchboard (essential services distribution panel including 220v main transformer/distribution panel)
Bell and chamber distribution panel provided for all services to the decompression chambers, transfer chamber and bell control.

Chamber Environmental Control Unit

Chamber Environmental Control Unit
Three chamber environmental control units, external to the chamber, are provided. Sanitary Water System
The sanitary water system is designed to supply service water to the living chambers for:
Shower and sink
Toilet flushing
The system includes:
Two (2) pumps
Two (2) accumulators/buffer tanks with pressure switch for automatic startup of the pumps
Two(2) water pressure regulating valves
Pipes, fittings and relevant accessories for correct functioning
Diver’s Hot Water
Two vertically mounted divers hot water machines are installed. Three (3) sets of elements can be switched on in turn to provide
hot water at a comfortable level to the divers. A pressure regulator is also installed to ensure the correct volume is supplied.
The hot water machines are provided with over temperature and water supply failure alarms.
Hot water flow rate : 30 1/min (approx)
Maximum pressure : 25 bar
Three phase electric motor : 5Kw 440v 60 Hz

Life Support Package

Life Support Package

PDC Emergency LSP ( Life Support Package ) Container

This LSP is kept on the shore nearby operations incase the HRC is evacuated from the Barge or Vessel due to fire or sinking or any other emergency requiring evacuation. The LSP package has its own ECU system, chamber control panel and gas quads with flexible hoses to connect and carry out the decompression of the divers safely.

Gas Reclaim System
The diver gas reclaim system comprises an LP gas return receiver, an HP gas supply cylinder, twin sodasorb CO2 removal towers,
O2 injection and O2 and CO2 analysis.
On commencing diving operations, the gas supply cylinder is charged with the appropriate breathing mix, the gas travels from the supply cylinder to the divers helmet via the main bell umbilical and the diver’s umbilical. The topside Haskel compressors place a suction on the
return line and the gas travels back to the surface via divers umbilical, the bell internal water trap and reclaim panel, the bell external water
trap and the main bell umbilical. It then passes through sodasorb CO2 removal towers at which point it is compressed and sent to the supply
cylinder where additional oxygen is injected to make-up the required bottom mix pO2. Dive helmets used with the reclaim are 3 x 17 Divex 601 ultra jewel reclaim helmets.

Guide Wire Winch and Clump Weight
Guide Wire Winch
Is a man-riding winch, which further acts as an emergency bell recovery winch. This winch is used to lower and recover the clump weight with a single guide wire reeved from the A Frame sheaves through the clump weight sheaves and back to the A Frame.
In emergencies the winch is able to lift the diving bell and the clump weight to surface.
S.W. load : 5.5 ton
Line speed : 40 m/min in water 15 m/min in air
Approx 500m Wire rope : 22mm diameter, non rotating.
Drum capacity : 500 metres
Drive : One electro-hydraulic motor
Brake : One mechanical band brake on the drum and one hydraulically operated

Clump Weight
The clump weight has a weight of approximately 0.5 tons in air and is handled by the guide wire winch through 4 sheaves. It is
used to guide the SDC and not allow it to twist or spin in the current.
The clump weight is fitted with stores bins for tools and diver’s bailout. A bell standoff is also an integral part of the clump weight.
Stores and Workshop Van

A 20ft ISO standard container, partitioned into stores and workshop. (Mass 5.5T) The fully fitted workshop is air conditioned.

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