As governments green their economies and utilities retire fossil-fuel power stations, wind installations are emerging as one of the most popular forms of alternative energy. Globally, offshore wind capacity is poised to quintuple between 2022 and the middle of the next decade, according to BloombergNEF, and to squeeze more energy out of the wind, turbines are getting bigger and bigger. That means that ships capable of installing them are in growing demand.
On the outskirts of Rotterdam, a bright orange ship is hoisted above the muddy Rhine with the help of six chunky triangular legs. The vessel has just been retrofit with a huge crane capable of lifting up to 1,600 tons 160 meters above deck.
Once the finishing touches have been made, the Wind Osprey will take off for Germany, and return to building wind turbines at sea.

