Marine Operations/

Transportation and Installation


Longitude has extensive experience in the transportation and installation of both floating and fixed offshore structures, and the transportation of high value onshore plants and equipment.

Offshore Marine Installation Services

Longitude has carried out the detailed design of all manner of offshore marine transportation and offshore installation engineering, from jackets and topsides through to FPSO mooring and modular plants. These solutions have been delivered using a range of marine fleets, from tugs and barges to DP construction vessels and module carriers.

To execute these projects, our specialist engineers provide a range of engineering services, including:

  • Dynamic lift analysis
  • Motions, mooring and stability analysis
  • Grillage design
  • Seafastening design
  • Structural integrity assessment

As part of the services offered, Longitude can provide engineering services for the loadout and discharge of project cargos, which may involve the lift of the cargo or roll-on roll-off (RO-RO) using a self-propelled module transporter (SPMT). Engineering for loadout and discharge operations may include ballasting calculations, lift analysis, quayside strength analysis as well as vessel strength and stability.

Risk Assessments, HAZIDs & SIMOPS

In addition to operations engineering, Longitude provides concept and detailed marine operations method statements, risk assessments and procedures, ensuring full health and safety compliance at sea. This ensures consistency between the engineering and ensures the project safety through thorough documentation of the operation. Longitude’s project teams can attend or facilitate HAZIDs or SIMOPS sessions for each operation.

Offshore Transport & Installation Clients

Longitude’s offshore transport and installation clients include shipyards, transportation and offshore installation contractors, vessel owners and asset owners. Solutions are tailored to the client’s specific requirements, ensuring the timely delivery of compliant, safe and cost-efficient solutions.