standards for environmental protection at sea. The Uthörn is the world’s first seaworthy ship powered by green methanol, which allows it to sail the North Sea virtually CO 2 -neutrally. In addition, the [...] life. Ship with a license to teach Researchers use the Uthörn year-round to cross the North Sea, and to assess how the sea is changing. To do so, they monitor its physical, chemical and biological status, [...] board the training ship. In addition to collecting samples from the North Sea, the Uthörn regularly goes on transect cruises. Here, the sea is surveyed and analysed at the same group of sites, again and again