Surface to subsea Specialists in hose and pipelay handling systems Surface to subsea Specialists in hose and pipelay handling systems

Oil & Gas

Our tried-and-tested solutions ensure safe and efficient operations in the oil and gas industry. We can assist with dive handling systems, cable and pipe handling systems, IWOC deployment, asset integrity management and cable and umbilical deployment.

Compact and portable Intervention Workover and Control Systems (IWOCS)
Pipe Handling Systems
Deepwater lowering and pipe handling systems
A-Frame Systems
Powerful A-Frame launch and recovery systems for ROV and cable trenching equipment
Dynamic Systems
Bespoke dynamic cable, hose and umbilical systems for drilling, subsea field development, intervention, repair and maintenance


The Seanamic Group’s offshore handling specialist, Caley Ocean Systems, supplies bespoke modular carousels, turntables, spoolers and tensioners for handling rigid and flexible pipe products, including cables, umbilicals, dynamic risers and hoses.

Carousels and Spoolers
High capacity carousels and spoolers, with capacities up to 9,000 tonnes
Bespoke tensioners systems up to 100 tonnes for cables and outsized bodies
Powerful A-Frame launch and recovery systems for ROVs and cable trenching equipment

Case Study

Caley IWOCS Subsea Deployment System
A portable deployment system for Intervention Work Over Control Systems (IWOCS) has been developed by Caley Ocean Systems to test the manifold functions on four deepwater subsea manifolds.
The Caley IWOC Deployment System is a self-contained, portable skid, comprising an A-Frame, umbilical reeler/power unit and deployment frame. The system enabled the subsea in-situ testing and operation of all manifold mounted valves, via the manifold Subsea Control Module (SCM).
The IWOCS Umbilical was able to overboard and retrieve the deployment frame, which provided the subsea interface for the umbilical, hydraulic flying lead and two electrical flying leads. These supplied electrohydraulic power and communications to each subsea manifold during the testing process. Once overboard, the deployment frame is guided under the water by ROVs.

Safe Handling

Caley’s IWOC Subsea Deployment Frame and Umbilical are safely handled by the A-Frame and docking unit. Equipment is fully captured during in-boarding and out-boarding, with minimum manual intervention, and increased protection of the equipment. All operations take place within the boundary of the skid, which means the system requires less deck space, is safer and more efficient than traditional IWOCS reeler and sheave arrangements.

The Caley IWOC Deployment System is suitable for use in Sea State Six conditions, allowing more intervention and workover operations to take place than traditional systems.

More information about Caley Ocean Systems

Caley Ocean Systems designs and manufactures offshore handling systems for the oil and gas, offshore renewable energy, marine, naval defence and oceanographic science and research industries. In addition to its Glasgow-based design facilities, Caley’s dedicated manufacturing plant has direct access to the River Clyde, allowing products to be shipped to international locations. Established in 1968, Caley became part of the Seanamic Group in 2014, and now works alongside Pipelay Systems, IMES International and Houston-based Umbilicals International.