this post was submitted on 11 Dec 2023
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I don't think cargo ships are going to be obseleted by trains even in a scenario where all fossil fuels are banned or otherwise unavailable, because ships can take advantage of wind power (sails).
It might also be advantageous to have several of those massive 200,000+ Gross Register Ton ships retrofitted or built with nuclear reactors, especially if those ships are state operated. There's really no reason not to when you start to reach sizes as absurd as that. A Nimitz Class Supercarrier is roughly 1/20 to 1/40 the displacement of some of those cargo vessels.
Obsoleted was perhaps too strong a word. As I mentioned in another reply, it's more about facilitating trade across land routes that are too far from shipping centres to be viable currently.