Ships move such long distances that batteries will be very expensive and will eat a large proportion of the useful load. Ammonia fuel cells, or, as stopgap, eve

Ships move such long distances that batteries will be very expensive and will eat a large proportion of the useful load. Ammonia fuel cells, or, as stopgap, even ammonia burned in diesel engines could be a much better fit. https://techxplore.com/news/2021-03-world-high-temperature-ammonia-powered-fuel-cell.html https://techxplore.com/news/2021-03-world-high-temperature-a... Absence of cheap bunker oil would though maybe motivate for more efficient designs / operations. Ie slowers speeds, variable schedules and all that.