• Caley Caley - bespoke deepwater deployment systems
  • Caley Caley - accurate and effective control systems offshore
  • Caley Industry leading design and software development
  • Caley A leading supplier of offshore handling systems for pipeline deployment
  • Caley Certified dive bell handling systems
    - 'over the side' and moonpool operation
  • Caley Award winning Caley Davit
    - guaranteed to Sea State 6
  • Caley Design and build in compliance with ISO14001:2004 and OHAS 18001:2007
  • Caley Caley - Bespoke submersible launch
    and recovery systems
  • Caley Caley use 3D modelling, finite element analysis and control system simulations
  • Caley A leading supplier of storage carousels for a wide range of rigid and flexible pipe products
  • Caley Caley Ocean Systems has wide experience of designing highly specialised A-frames
  • Caley Caley - Specialists in the design & manufacture of Pipeline Deployment Systems

Welcome to the Caley Ocean Systems Ltd web site. We are a specialist in the design, software development and manufacture of offshore handling systems for the oil and gas industry, offshore renewable energy, and oceanographic science and research. We also build heavy weather, maritime rescue boat handling systems and naval rescue vessels for a wide range of maritime clients.

Caley A-Frame for Boskalis Ndurance cable laying vessel

Caley Ocean Systems has supplied a high performance, A-frame handling system to Boskalis Offshore for launching trenching vehicles and ploughs from the company's first 'N Class' cable-laying vessel Ndurance.


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Mounted on the stern of the Ndurance, the Caley A-frame is capable of handling loads of 70 tonne with a maximum lift and reach of 21m up to Seastate-5. The A Frame structure is manufactured in three sections, two leg sections and a top crossbeam. The crossbeam includes the pivot mountings for A-frame's telescopic swinging beam assembly mounted on a dampening frame, allowing the lifting system to handle a wide range of equipment.


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The A-frame includes an anti-pitch system incorporating two double acting hydraulic cylinders trunnion mounted to the crossbeam, together with hydraulic power unit (HPU) and winch, for maximum operational flexibility. In addition to cable-laying, the Ndurance’s A-frame will be used for a range of other tasks, including launch and recovery of tools and equipment associated with offshore construction projects.

The Caley A-frame is widely used in offshore and ocean science applications where several systems have been in continuous service for over 30 years with many thousands of successful deployments.