The aim was to transport both, the tower sections and the leaves with the same ship, which should alternately call at the port of Stade and Aviles. The choice fell on the “HR Constitution” with 2 x 240 tonnes cranes, which was adapted to the individual transport concept, in accordance with the specifications of the Bremer Lloyd’s engineering department, before the project started. In addition to a multitude of detailed questions, such as the cabotage of the under the foreign flag sailing HR Constitution, the concept includes three key aspects:
- Stowage of three stacking tiers of leaves below deck, although only one intermediate deck was present.
- Speed-up of loading / unloading times by mounting the blade racks in predefined position.
Avoid welding and ensure conformable weight distribution by using heavy lift platforms for the tower racks.
The entire concept was implemented according to the guidelines of DNVGL Noble Denton. The prescribed cooling times of welds before a test by the MWS was circumvented, by no further welding after the mobilization of the ship.