Abstract: A wind turbine comprising at least two separate units assembled to form a nacelle connected to a wind turbine tower. A first of said two units houses a rotor-supporting assembly and a generator. To enable a large degree of flexibility and the ability to reconfigure, a second of said two units houses an electrolysis cell stack powered by the generator.

Abstract: A payload coupler with a position control device for controlling a position of the payload coupler when suspended from a lower end of a line for attachment at an upper end thereof to a lifting device. The payload coupler includes a payload attachment means and at least two propulsors. The payload attachment means couples to and/or decouples from a payload and is arranged to directly couple the payload coupler to a payload. The propulsors are configured to generate resultant propulsion forces which are non-parallel and having at least a component perpendicular to the axis of the line when the line is hanging taut under gravity.

Abstract: A wind turbine tower evacuation tool (10) is provided comprising an object end (20) for attachment to an object (500) or a person (555) and a roller end (30, 301, 302, 303) configured for connection to a surface of a wind turbine tower (110) by magnetic attraction. The roller end (30, 301, 302, 303) comprises at least one magnet body (33) arranged for rotation around a rotational axis of the roller end (30, 301, 302, 303). The wind turbine tower evacuation tool (10) further comprises a rope element (11) connecting the object end (20) to the roller end (30, 301, 302, 303).

Abstract: A method for carrying out a maintenance operation on a wind turbine, comprising: stationing a maintenance vehicle proximal to the wind turbine, initiating a maintenance operation on the wind turbine, deploying a UAV from the maintenance vehicle, wherein the UAV has a payload including a rescue package, positioning the UAV such that the rescue package is placed on the wind turbine. A system is also provided.

Abstract: The invention relates to an apparatus and method for determining presence of microorganisms in, e.g., sea water or other water samples. Means are provided for taking a sample of the water to be tested, moving it through a series of reservoirs, and combining it with an indicator, such as a dye, which binds to DNA of any microorganisms in the sample. Any binding of indicator is measured by, e.g., a spectrofluorometer, or other device suitable for measuring the indicator.