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Rib offshore services
 


  Many of todays  Windfarms have requirements for surface diving intervention .

  These interventions are typically:

l  Welding  Inspection

l  Marine growth removal

l  Umbilical and cable inspection

l  Maintenance  works

l  Replacement works

l  Cofferdam installation (to enable internal works to be conducted)

è In addition, some new works can be required such as:

l  Umbilical installation

l  Pile inspection

  Larger DSVs can prove difficult to access some of these areas (particularly cable installations) and are also very costly.  

 The solution for the works above is a diving Rib for close approach to the worksite to reduce the risk for divers and create more diving time in tidal waters.


The RIB‘s Advantage

   Cost effective over DSV intervention

   Fast response in emergency situations

   No DSV umbilical access restrictions

   No safety issues with large DSV in close proximity to installation

  

Self Contained, when away from Mother Vessel

Multiple campaigns can be scheduled together and optimise utilisation

 

  Length:          12 metres

  Beam:            3.75 metres

  Max Op Weight:      8.3Te

  Unladen Weight:      7.3Te

  Speed:           25 knots

  MCA Approved Class 2 Vessel ( up to 60 nautical miles offshore)

  Certified for 10 Crew

  Enclosed Wheelhouse

  Robust Aluminium Hull

  Diesel Driven

  Jet Drive Propulsion

  4.5Kva Generator

  Marine VHF Communications

  Built In Nitrox Dive System

  Diving Gas Capacity for 12hr operations

  4 Point Lifting Arrangement

  GPS/Echo Sounder and Emergency Equipment (MCA)

 



 Diving system


  3 Man Nitrox Dive Panel

  Dive Scan Monitoring System

  Diver Video System

  Nitrox Gas Supply: 14 x 50L gas cylinders (136,500 litres at 195 bar)


  The RIB has been specifically designed to meet the requirements for offshore commercial diving operations, with an integral Nitrox diving system built in to the structure of the vessel.

  The vessel is classified under the UK Maritime and Coastguard Agency (MCA) as a Class 2 Brown Code Workboat and is fully certified to carry out operations up to 60 nautical miles offshore or 2 miles away from the mother vessel anywhere at sea.

  Weather – Max sea state of 1.5 to 2.0 metres for deployment, working limits are wider if in Lee of Mother ship or installation.


 

  FPSO Hull & Turret Spider Operations

  Cofferdams, Seachests, Flexible & Umbilical Pull Ins

è Platform Operations

l  Open structure jacket inspections (ACFM etc)

è Landfall Operations

l  Inshore Pipelines & Terminals

è Windfarm Operations

è Small ROV deployment

l  It is possible to facilitate a small electric eyeball ROV from the onboard generator

è Small Tool package deployment

l  ACFM & FMD have already been utilised from the RIB

 

 

Classification:

UK Maritime and Coastguard Agency (MCA),

Class 2 Brown Code Workboat.

Loadline Certification permits the RIB to operate up

to 2 nautical miles away from the mother vessel in

daylight hours.

Certified for 10 personnel or a cargo of 800kg and

2 personnel.

 

Dimensions:

L.O.A. 12.5 metres

Beam 3.75 metres

Weight unladen 7.3 Te

Weight operational Not to exceed 8.3 Te

Performance 25 knots

 

Hull:

6mm Marine Sheet Aluminium hull plating. All

welded construction of massive web aluminium

stringers and stiffeners giving six watertight

compartments.

 

Hull Tubes:

Heavy duty hypalon coated neoprene rubber

construction with nine separate compartments.

Propulsion and Control:

Engine: Caterpillar 450 Hp 3126B Electronic

Diesel.

Propulsion: Hamilton 322 Waterjet Drive.

Gearbox: ZF IRM

 

Generator:

Onan 4.5 Kva Marine Diesel Generator

 

Navigation and Communications:

Marine VHF radio + 2 VHF Hand Held Radios

N.U.C. Lights and Mast

Combined GPS / Plotter

Echo Sounder

Compass

Back Up Battery Inverter System

 

Emergency Equipment:

Fire Extinguishers

1 x SOLAS approved lifeboat for 10 persons

2 x Lifebuoys

Distress Flares

First Aid Kit

Tow Rope

 

Lifting Arrangement:

4 point lift from padeyes forward and aft. Proof load

tested to 16.5 Te. (2.2 x SWL)

 
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