Orbital launches O2, the "most powerful tidal turbine in the world" Orbital launches O2, the "most... Orbital's O2 floating tidal power platform is rated at 2 MW, and it's designed to harvest tidal power much more cheaply than barrage-style installations Orbital Marine Power 1/2 Orbital's O2 floating tidal power platform is rated at 2 MW, and it's designed to harvest tidal power much more cheaply than barrage-style installations Orbital Marine Power 2/2 18-metre arms hold two 20m turbines under the surface, or raise them up for cheap, easy maintenance Orbital Marine Power Scotland's Orbital Marine Power (formerly Scotrenewables) has completed the build on what it claims will be the world's most powerful operational tidal turbine. It's now on its way to the Orkney Islands, where it'll have a chance to prove its worth connected to the grid.