The disclosure provides a method for vessel maintenance optimization, the method comprising the steps of: obtaining operational data of the vessel; calculating a Torque Index; calculating a Slip Index; indicating that propeller cleaning is required if the Torque Index exceeds a Torque Index threshold, and indicating that hull cleaning is required if the Slip Index exceeds a Slip Index threshold.

In order to provide an improved and cost-efficient method for performing an exchange of up-tower main components on an off-shore wind turbine a method is disclosed in during which a non-permanent service platform is temporarily coupled to a wind turbine tower lower section. In addition, a wind turbine structure and a system including such a structure are described, the wind turbine structure and the respective system being designed to allow performing the described method.

In order to provide an improved and cost-efficient method for performing an exchange of up-tower main components on an off-shore wind turbine a method is disclosed in during which a non-permanent service platform is temporarily coupled to a wind turbine tower lower section. In addition, a wind turbine structure and a system including such a structure are described, the wind turbine structure and the respective system being designed to allow performing the described method.

An anticorrosive construction machine for cofferdam of a ship comprises a support, a grinding roller, a support device, a lifting device, a driving device, a heat exchange device, a spraying device, a machine case, a collecting hood, a fan, a first conveying tube and an exhaust hood; the grinding roller is rotatably arranged on inner wall of the support, the machine case is arranged on the support device, the support is arranged on a side of the machine case in a vertically moving mode via lifting device, the collecting hood is arranged on inner wall of support, the fan is arranged on outer wall of support, the driving device is arranged on the support for providing power for grinding roller and fan, input end of the first conveying tube is connected with the collecting hood, and output end of the first conveying tube is connected with the fan.

An anticorrosive construction machine for cofferdam of a ship comprises a support, a grinding roller, a support device, a lifting device, a driving device, a heat exchange device, a spraying device, a machine case, a collecting hood, a fan, a first conveying tube and an exhaust hood; the grinding roller is rotatably arranged on inner wall of the support, the machine case is arranged on the support device, the support is arranged on a side of the machine case in a vertically moving mode via lifting device, the collecting hood is arranged on inner wall of support, the fan is arranged on outer wall of support, the driving device is arranged on the support for providing power for grinding roller and fan, input end of the first conveying tube is connected with the collecting hood, and output end of the first conveying tube is connected with the fan.

The disclosure provides a method for vessel maintenance optimization, the method comprising the steps of: obtaining operational data of the vessel; calculating a Torque Index; calculating a Slip Index; indicating that propeller cleaning is required if the Torque Index exceeds a Torque Index threshold, and indicating that hull cleaning is required if the Slip Index exceeds a Slip Index threshold.

The disclosure provides a method for vessel maintenance optimization, the method comprising the steps of: obtaining operational data of the vessel; calculating a Torque Index; calculating a Slip Index; indicating that propeller cleaning is required if the Torque Index exceeds a Torque Index threshold, and indicating that hull cleaning is required if the Slip Index exceeds a Slip Index threshold.

An integrated passenger or goods transport system, comprising: a vessel (10) capable of maintaining itself at a fixed height with respect to the floating surface (100), in all conditions of speed and sea state. A system capable of supporting the vessel once it has rested thereon (31). A quick-release coupling system (50) of the pylon (14) and the submerged body (11), in which the propulsion system (20, 22 and 23), the drive system of the wings (12) and the rudder (21), the batteries (19) are contained. A system (70) for recovering and moving the submerged body (11) and the pylon (14) when they are released from the upper part of the vessel (16). This system (70), consisting of an arm having two movements, one in the vertical direction and one in the transverse direction, is also capable of sliding longitudinally on a trolley (71). Once the arm is engaged to the lower part of the vessel, the electrical and hydraulic connections are also restored: this makes it possible to charge the battery, download data for diagnostics and maintenance.

An integrated passenger or goods transport system, comprising: a vessel (10) capable of maintaining itself at a fixed height with respect to the floating surface (100), in all conditions of speed and sea state. A system capable of supporting the vessel once it has rested thereon (31). A quick-release coupling system (50) of the pylon (14) and the submerged body (11), in which the propulsion system (20, 22 and 23), the drive system of the wings (12) and the rudder (21), the batteries (19) are contained. A system (70) for recovering and moving the submerged body (11) and the pylon (14) when they are released from the upper part of the vessel (16). This system (70), consisting of an arm having two movements, one in the vertical direction and one in the transverse direction, is also capable of sliding longitudinally on a trolley (71). Once the arm is engaged to the lower part of the vessel, the electrical and hydraulic connections are also restored: this makes it possible to charge the battery, download data for diagnostics and maintenance.

A safety system according to the present invention includes an on-ship system which is provided on a ship and a land system which is provided on land. The on-ship system and the land system each obtain, from a safety detection device and a safety maintenance device which are provided on a ship, data which has been detected by the safety detection device and a signal which indicates a state of the safety maintenance device, and, on the basis of the obtained data and signal, transmit to the safety maintenance device a control signal for controlling the safety maintenance device.