U.S. Navy Submarine First In World Fitted With Silent Caterpillar Drive
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.
The Magnetohydrodynamic drive is being developed under the PUMP program by DARPA (Defense Advanced Research Projects Agency), first reported in 2023. Water passing through it is accelerated by means of a magnetic field using superconducting magnets. This is often likened to the way a caterpillar crawls leading to the colloquial term ‘caterpillar drive’.
The first boat to be fitted with the new propulsion will be the USS Montana (SSN 794). This Virginia Class attack submarine was commissioned into the U.S. Navy in June 2022. Although still a new boat, she has been brought in to Groton, Connecticut, for the modifications.
It is likely to be particularly stealthy as there are no moving mechanical parts. This will make the submarine particularly difficult to detect using passive sonar which listens for noises emitted by the targeted submarine. Sonar operators searching for the USS Montana will likely hear noises which are indistinguishable from natural phenomenon, such as seismic activity.
