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 MARINE & ENGINEERING CONSULTANTS London Offshore Consultants Subsea Cable Installation  A Marine Warrant y V iew NAREC Offshore Renewables and Subsea Power Cables Workshop 4 December 2013
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6. Loc Subsea Cables Installation Marine Warranty View - Narec 4-12-13

Oct 13, 2015

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  • MARINE & ENGINEERING CONSULTANTS

    London Offshore Consultants

    Subsea Cable Installation A Marine Warranty View

    NAREC Offshore Renewables and Subsea Power Cables Workshop 4 December 2013

  • Introduction

    Introduction

    LOC

    Marine Warranty

    Cable Lay Overview

    Planning

    Operations

    Issues

  • London Offshore Consultants

    Established in 1979

    Serving both Shipping and Energy Markets

    LOC Group

    Has over 200 technical staff

    24 Operating offices worldwide

  • LOC Group Offices Worldwide

  • Our People

    Over 300 professional staff including dedicated contract personnel

    20 nationalities

    12 languages

    Broad range of disciplines

    Naval Architects

    Master Mariners

    Marine Engineers

    Marine Civil Engineers

    Structural Engineers

    Offshore Engineers

    Subsea & Pipeline Engineers

  • Our Services

    Shipping

    Marine Casualty Investigations

    Salvage and Wreck Removals

    Strength, Stability and Motions

    Analysis

    Cargo Damage

    Fixed Object Damage

    Expert Witness

    Loss Prevention Studies

    Surveys, Inspections and Audits

    Claims, Disputes and Litigation

  • Our Services (cont.)

    Energy

    Marine Warranty Surveying (MWS)

    Transportation and Installation

    Evaluation and Verification

    Offshore Incident / Casualty

    Investigations

    Surveys, Inspections and Audits

  • Our Clients

    Insurers

    Protection and Indemnity (P & I) Clubs

    Hull & Machinery (H & M) Underwriters

    Energy Underwriters

    Maritime Lawyers

    Ship-owners

    Energy Companies

    Banks / Ship Financiers

    Shipbrokers

    Governments

  • MARINE & ENGINEERING CONSULTANTS

    Marine Warranty Surveying Energy (Oil and Gas)

    Renewables

  • The MWS Surveyor Role

    The fundamental objective of the Marine Warranty Surveyor is to make reasonable endeavours to ensure that the risks associated with the warranted operations to which a Warranty Surveyor is appointed are reduced to an acceptable level in accordance with best industry practice.

  • The MWS Surveyor Role

    The MWS is an independent consultant employed by the assured to carry out the following:

    Document Reviews

    Design Specifications

    Design Calculations and

    Drawings

    Procedures

    Vessel Suitability Surveys

    Operations Approvals

  • Operational Approvals

    Critical operations require a Certificate of Approval: Load-out /Loadin Sail-away/Securing/Seafastening Installation (Pull in, laying, burial, trenching) Repair

    Certificates of Approval are normally issued prior to the commencement of an operation but some Underwriters also require them on completion of the operation

  • Overview of Cable Installation

    Planning

    Cable Delivery

    Cable Pull In

    Cable Lay

    Cable Protection

    Post Lay Survey

  • Planning

    Route Survey Cable Risk Analysis Burial Assessment Burial Management Plan Vessel Selection Burial Method and Tool Selection Analysis Method Statement and Task Plans

  • Cable Delivery

    Load Out at Factory Transportation Transpool to

    Installation Vessel

  • Cable Pull In

    Beach Landing Rollers Floating Pull Through Duct Trench

  • Cable Pull In

    First End Foundation Cable Protection System

    Second End Foundation Cable Protection System Quadrant

  • Cable Lay

    Simultaneous Lay and Burial

    Plough Jetting Trenching

  • Cable Lay

    Free Lay and Post Lay Burial

    Jetting Trenching

    Lay into Trench Backfill

  • Cable Protection

    Hazards Fishing Anchors Vessel Activity Scour Seabed Mobility Dredging

    Mitigation Burial Rock Berm Gabion Bags Mattress Split Pipe Articulated Pipe

  • Post Lay Survey

    Multibeam Echo Sounder Seabed Modelling to

    Establish Datum for Future Surveys

    Hazards, Exposed Cable

    Side Scan Sonar Seabed Imagery, Hazards,

    Exposed Cable

    Magnetometer Cable Burial Depth

    Sub Bottom Profiler May Give Burial Depth

  • Issues

    Planning Inadequate Survey Burial Assessment Vessel Selection Tool Selection

    Installation Design of Foundation

    Interface Competence Contingencies

  • MARINE & ENGINEERING CONSULTANTS

    London Offshore Consultants

    Subsea Cable Installation A Marine Warranty View

    NAREC Offshore Renewables and Subsea Power Cables Workshop 4 December 2013

    IntroductionLondon Offshore ConsultantsLOC Group Offices WorldwideOur PeopleOur ServicesOur Services (cont.)Our ClientsThe MWS Surveyor Role The MWS Surveyor Role Operational ApprovalsOverview of Cable InstallationPlanningCable DeliveryCable Pull InCable Pull InCable LayCable LayCable ProtectionPost Lay SurveyIssues