As part of the Pa-X-ell2 research project, the Rostock-based shipping company AIDA Cruises is investigating the development of a hydrogen-powered fuel cell as part of a decentralised energy system. The American parent company Carnival Maritime GmbH has joined the “Getting to Zero” initiative of the shipping industry and wants to put the emission-free cruise ship into operation in 2030, and by 2040 the entire fleet should be climate-neutral.