Since summer in Western Australia (November through April) is also cyclone season, the Prelude is designed to withstand up to Category 5 storms without breaking free from her moorings. Connected to the seafloor by four sets of mooring lines running through the 305 foot tall turret, the largest of its kind in the world, the facility can continually turn into the wind with the assistance of three 6,700 HP thrusters to avoid capsizing.

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Building it was the easy part. At least as of today we know that it's also got the all-important floating part down cold. [Shell via Gizmag]