Abstract: The generation of electricity is described, using an offshore wind turbine. A generating sub-assembly 101 is supported by support mechanism (103) upon a support structure 102. The generating sub-assembly has a wind-responsive turbine and an electrical generator. The support structure includes a buoyancy portion (106) for submersion in water and a mast portion (108) extending from said buoyancy portion to extend the generating sub-assembly above the waterline. The support structure is buoyant and is free to roll when floating in water and the support mechanism is hinged to allow the generating sub-assembly to maintain an operational angle during the rolling of the support structure.