transports become because higher rated capacity also means taller towers heavier nacelles and longer rotor blades Rather than calling them more difficult Dufresne would call them more demanding or more challenging Explaining the implications he says As a result of the fast dimensional growth in technology our experiences with specific routes soon lose their value Things that are still possible with 120 tons may fail with 140 We now even have to see familiar routes we ve used many times before in a new light Local challenges In view of the many challenges that ground transportation entails one would expect the hauling of components for offshore wind farms to their sites at sea to be child s play Yet even maritime transport en counters bottlenecks Here s an example to illustrate the point The components for wind farms produced at the Labrador harbor in Bremerhaven have by now be come so large that they can no longer be shipped through the narrow lock at the fishing harbor to the seaside loading quay Instead of using the simple route across the water the components now traverse the town as a heavy transport before being loaded onto a special vessel and heading for the open sea There far away from the shore the ship lifts itself out of the water on huge steel struts and mutates into a mounting platform for the towers nacelles and ro tors Now only the wind as an adversary can delay their installation the wind though is the reason why the components are here To install the giant offshore wind farms the wind power industry uses special vessels that lift themselves out of the water by means of hydraulic jacking systems THE AUTHOR Ever since Kay Dohnke saw the Large Wind Farm Gro wian in the German state of Schleswig Holstein he s been fascinated by wind power and enjoys writing about it and other sustainability topics The only experience he s still lacking is a visit to the nacelle of a turbine on top of the tower here and now 65

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