Except we have it.
American submarines will further extend their advantage in the undersea domain. In the first of a kind, the U.S. Navy has fitted a new form of propulsion, magnetohydrodynamic drive (MHD), to a Virginia class submarine. This promises to make the submarine virtually undetectable, the holy grail of naval warfare.
https://www.navalnews.com/naval-news/2024/04/u-s-navy-submarine-first-in-world-fitted-with-silent-caterpillar-drive/
April Fools!
American submarines will further extend their advantage in the undersea domain. In the first of a kind, the U.S. Navy has fitted a new form of propulsion, magnetohydrodynamic drive (MHD), to a Virginia class submarine. This promises to make the submarine virtually undetectable, the holy grail of naval warfare.
https://www.navalnews.com/naval-news/2024/04/u-s-navy-submarine-first-in-world-fitted-with-silent-caterpillar-drive/
April Fools!