@Kapitan theoretically yes, but for the time being this system is much too complicated and expensive; when there is serial production this might change.
I saw that the 212 boats have to be filled up with liquid hydrogenium now and then.
https://defencyclopedia.com/2016/07/...ion-aip-works/
There is 'marine Diesel' in Germany used for yachts and the like, the bulk masses of LSFO fuel oil for freighters is at the very lowest end of what you could call a fuel, it indeed stinks and pollutes everything it comes in contact with.
Problem is not ony the burning and (trying) cleaning the exhaust gases, but that merchants and cruise ships of all nations just flush the tanks with seawater now and then to clean them, releasing the accumulated toxic sticky bottom grime into the ocean. As long as this is 'best practice' the exhaust gases are of lesser concern
