LOC and Longitude’s naval architects, master mariners and marine engineers offer expertise, advice and analysis addressing a wide-range of concerns for the modern or historic large yacht owners, managers, insurers or financiers. We are able to provide advice with respect to the technical aspects of design, construction, maintenance, transportation, repair and salvage operations.


  • New builds, conversions and repairs
  • Structural assessments – using finite element analysis
  • Vessel performance prediction including motion analysis
  • Manoeuvring and manoeuvrability analysis using computer modelling
  • Intact and damaged stability
  • Yard and fabricator assessments
  • Pre-purchase surveys
  • Regulatory compliance surveys: ISM, class, DCV and MCA
  • Design, third party evaluation or verification of marine structures


  • Assistance in salvage operations
  • Investigating cause of structural failure on vessels
  • Collision: causation and consequences investigation
  • Prediction of speed and track of ships using computer simulation
  • Providing expert evidence for use in court, arbitration or public inquiries


  • Fuel bunkers and lubricating oil investigations
  • Ballast Water Management plans
  • Assessment of dangers to casualties prior to and during salvage operations
  • Classification and statutory standards
  • Vibration analysis
  • Noise reduction analysis
  • Planned Maintenance Systems
  • Hull and machinery surveys and investigations
  • Transport – heavy lift transportation design and approval
  • Condition surveys
  • Off hire reduction support
  • Third party monitoring of repair contracts; specifications preparation, bid documents, management and supervision
  • Advice on dynamic positioning (DP) systems

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For more information on LOC’s yacht services, please contact your local yacht services’ coordinator