Fwiw, the rim-driven pump-jet the article is talking about is not the same thing as the caterpillar drive [1] from Hunt For Red October, to which the article co

Fwiw, the rim-driven pump-jet the article is talking about is not the same thing as the caterpillar drive [1] from Hunt For Red October, to which the article compares it. That said, this could be a similarly effective improvement to the submarine's acoustic signature and stealthiness. [1]:https://en.wikipedia.org/wiki/Magnetohydrodynamic_drive https://en.wikipedia.org/wiki/Magnetohydrodynamic_drive