U.S. Navy Submarine First In World Fitted With Silent Caterpillar Drive - Naval News
Submarines use stealth to dominate the seas, presenting an illusive yet deadly threat. Now U.S. Navy submarines will take stealth to a new level. American submarines will now be fitted with magnetohydrodynamic drive.
Because its already been in use for 10 years and they have something better now.
Comms are like that. Hidden in plain sight for those who are listening. Or just a coincidence ?