Meanwhile, we already have decades of operational experience with civilian nuclear maritime propulsion. It's objectively more mature technology than green fuel.
And for the record, I do indeed know hydrogen powered combustion engines work. Perhaps you're unaware that by virtue of hydrogen's much hotter combustion temperatures, it's hard to avoid producing nitrogen oxides (a greenhouse gas) as a byproduct in hydrogen combustion engines [1]. Hydrogen fuel cells are an alternative, but those have less power to volume ratios and have never been deployed at the scales required for nuclear maritime propulsion. Not only that, containing and plumbing all this liquid hydrogen is a challenge, too. There's more complexity than you think to make a hydrogen engine that doesn't emit greenhouse gases.
1. https://en.m.wikipedia.org/wiki/Hydrogen_internal_combustion...
We also have more experience using biogas to be burned in combustion engines and turbines of any sort, as we do creating said biogas.
We also way more experience in creating sythetic fuels, and using electrolysis to create hydrogen out of sea water (green hydrogen).
Those are all solved problems, and thisbis not my opinion, as opossed to you, but facts confirmed by the very industries involved in ship building and shipping.
Really pointless to discuss with ignorant tech illiterates like you.
And again, how many of those are using hydrogen, ammonia, or synthetic methane?
> We also way more experience in creating sythetic fuels, and using electrolysis to create hydrogen out of sea water (green hydrogen).
Absolutely not. Almost all synthetic fuels is using biomass as an input, which does not scale. And only tiny, tiny fraction of hydrogen is produced in a carbon neutral manner. Less than 0.05%: https://en.m.wikipedia.org/wiki/Green_hydrogen
Again, if these are solved problem, show me the fleet of ships powered by hydrogen, ammonia, or synthetic methane.
Nuclear technology: if it isn't exactly the same thing we need, no matter how close, it doesn't exist.
Hydrogen etc.: we have a rough analogy and no real way of getting from there to here, therefore it is proven technology.
I get it, you area NS Savannah and nuclear fanboy, reality so simply doesn't agree with you, nor do the relevant industries.