'Fluid cloak' for stealth submarines

This technology needs a LOT more work it sounds like, a 1cm object that only moves 36 meters per hour, and bigger objects will need to move even slower, doesnt really sound very useful.

Is this something the enemy already knows...?

Reality, if we can do it, it's only a matter of time before someone else can. Could be that they already do.

I just mean, shouldn't this stuff be kept under wraps? Obviously all the details aren't disclosed, but its quite public and anybody could read it. If you know what I mean?

It is often considered acceptale to let any possible enemy know that you can do something, without letting them know specifically how. If a possible enemy doesn't know your capabilities and how to beat them, they are less likly to change from possible enemies to actual enemies. Just because other countries know we are stealth capable doesn't mean they compromise our abilities. It does mean, however, that they know we can strike without warning and are probably best left alone. I think Iraq would have done well to consider that before desert storm, when they still had the fourth largest militar... [More]

With ever increasing stealth, I wonder what happens when a whale slams into the sub.

Nowadays? Not much, unless it happens to hit one of the stabilizers. Back in the day, they used to do some awful damage to ships.

@BrokenBrain: thanks for that commment..cleared up a few questions I had I never looked it at that way. So really, it helps prevent war also.