Improvements to a cleaning assembly include a support for a rotating object, a rotary brush, an apparatus for manoeuvring a floating vessel and an arm arrangement for cleaning a surface. Thus, an inventive cleaning assembly is provided, the cleaning assembly comprising a submersible framework, and two arms of the aforementioned arrangement pivoted to the submersible framework at the opposite end of the arm to the brush and gimbal arrangement, the arms having a substantially horizontal rest position and pivoted to allow the arms to move to move the brush to clean both sides of a floating vessel.