Figure 77 Jack-up vessel, courtesy of RWE.
Function
Large component repair vessels support the change-out of large nacelle and rotor components that need a stable hook height at hub height.
Who supplies them
See Turbine installation vessel [I.6.1].
Key facts
Large component repair vessels are typically self-propelled jack-ups that can install, or have previously installed turbines.
Most large component repair vessels are installation vessels that are no longer able to install current turbine models or are suboptimal for the purpose. Given the large number of such vessels, day rates are competitive and owners typically seek to negotiate call-off contracts for vessel or charter them for several months for intensive maintenance or service campaigns.
Older installation vessels are not necessarily well suited for maintenance and service without modification. They may not be able to work at sufficient water depths for some projects and they may be over specified in terms of crane capacity and deck space. A Site Specific Assessment must be carried out prior to commencement to ensure the vessel can safely work with the site soil conditions, weather limitations and water depths.
What’s in it
- Marine planning
- Vessel maintenance and service