Until a navy figures out how to make a hull out of salt water, any ocean going vessel can be detected and tracked.
Every vessel moving in the water creates a wake. I guess if it’s sitting still it will be hard to detect, but what good is a ship that doesn’t move?
Project Habakkuk
https://en.wikipedia.org/wiki/Project_Habakkuk
The Russians can’t seem to keep paint on their hulls, and they’re talking about coating them with RAM? That’s pretry funny.
I suspect this isn’t intended to keep the ships from being detected but to deny radar guided missiles the ability to localize and lock on. That would seem to be a good idea at it would force an enemy ship to have to close to direct-fire gun range to engage it.
Did I mention that our latest surface combatant classes don’t actually have working naval guns? Going to be awfully difficult for the US Navy to fight these when none of our armament will actually lock onto it and there’s no working guns to fight it with.