The production of ammonia for the fertilizer industry is, according to the IEA (International Energy Agency), the second most important area of hydrogen utilization. We therefore presented some concrete projects for the production of green ammonia in the July 2021 issue of H2-international. But what about the user side? Up to now, ammonia has hardly played any role as an energy carrier, although it could become an important source of energy, especially in transport by ship. The compound has numerous advantages over other energy mediums. At the same time, however, there are still many technical and logistical challenges to be solved, which are being addressed by, among others, the research projects ShipFC and Campfire.