Yes.
The vessel has an approximately 15,000-metric-tonne variable deck load and a maximum transit speed of 12 knots.
The classification class by DNV is a 1A1 ship-shaped drilling unit, drill “N” classification, which means all the drilling equipment actually comes under the classification society, not just the main equipment.
In terms of water depth, it's capable of operating in a maximum of 10,000 feet of water. For dynamic positions, she has a Kongsberg Simrad dynamic positioning system, complying with class notation DNV Dynpos-AUTRO NMD, or Norwegian Maritime Directorate, class 3. This system controls the vessel's position and heading using the vessel's azimuth thruster pods.
In terms of station keeping, again, as I've mentioned, the DP system is rated DNV class 3; such a loss of position should not occur from any single failure, including a completely burned fire subdivision or flooded watertight compartment.
The vessel has installed the Kongsberg Simrad dynamic positioning system. This system controls the vessel position heading using the vessel's azimuth thrusters. It can be done in a variety of modes, including manual and automatic. Manual thrusters can be selected at the panels; however, the automatic function requires at least one reference unit in use.
The SDP system is computerized for automatic positioning and heading control of a vessel. To control the vessel's head, the DP control system uses data from three gyrocompasses, with at least one position reference system--for example, the differential global positioning system or hydroacoustics. This enables the DP control system to position the vessel at all times. This is how the vessel maintains station.
Set points for heading and position are specified by the operator, that's the DP operator, and then processed by the DP control system, to provide control signals to the vessel's thruster and main propeller systems.
The DP system always allocates optimum thrust to whichever propulsion units are in use. Deviations from the desired heading or position are automatically detected and appropriate adjustments are made by the system.
Power management, obviously part of the DP system, is designed to ensure that sufficient power is available at all times. To accomplish this, the power management system control system will perform the following functions.
It will monitor the condition of each diesel engine generator set, and start up or shut down specific generator sets in response to alarm conditions, barometers measured and monitored by the system.
It controls the load-sharing of the generator sets online and monitors the load situation of the power grid. It initiates starting and recommends stopping of engine generator sets as required to maintain sufficient power to the electrically driven equipment. This is accomplished whilst at the same time not allowing unnecessarily high amounts of power to be connected to the grid.
The power management system provides a system of anti-blackout protection, provides blackout restart of the power system in the event of a total system loss, and at all times maintains sufficient power for the operation of the ship thrusters to maintain the vessel's position as a priority.
Moving on to the Stena Carron management system and HSE case, the Stena Carron currently operates under an approved HSE case, which is aimed at three main constituencies. That is the employees and contractors, customers, and regulators.
The said HSE case demonstrates the effective risk management of the drillship to the stakeholders through documentation of the following.
Stena Drilling operates with an effective management system that includes the identification and management of hazards to the health and safety of people and harm to the environment.
The Stena Carron is a high-specification vessel, and the vessel, with its critical equipment, has been designed, built, and maintained in accordance with good industry practice.
Stena Drilling operates the Stena Carron with a clear understanding of the risks from major accident hazards based on the application of formal risk assessment techniques.
Moving on to the Stena Drilling management system, this provides a formal set of policies, procedures, and processes required for planning and execution of its business processes: promote the Stena care, innovation, and performance values; improve health, safety, and environmental performance; provide key management-of-risk tools; enhance business processes and productivity; demonstrate procedural compliance; document control to clients, third parties, and other regulatory authorities; and be formally controlled and auditable.
In terms of main documents within the management system, we have policies, principle documents, guidance documents, forms, procedures, and process maps.
The management system itself has a hierarchy. We have level one, which is our corporate. This level includes the quality manuals, Stena policies and values, and organograms done by the managing director.
Moving down through the various levels, we have the support processes at level two. This level incorporates all the main departments that support the organization. That's HSE operations, engineering, HR, accounts payable, purchasing, IT, commercial, etc.
Moving down to regional, this level includes all regional-specific procedures and documents that may be required to operate within that region or country, and do not apply as a level two worldwide.
Moving on to level four, that's at the rig vessel level--