Neutrinos are directional. Any jamming would come from a different direction. The jammer can't match the direction - as the submarine moves the direction of th

Neutrinos are directional. Any jamming would come from a different direction. The jammer can't match the direction - as the submarine moves the direction of the source changes in a predictable way, the jammer would change in a different way. Think of it as a tiny light bulb blinking as you walk in a circle around it. Doesn't matter where you put the jamming light bulb it won't be in the center of your circle like the source light bulb is.