Wet Navy in the future

What is supercavitation. I know what regular cavitation is, is super
cavitation where you get sucked backwards by the bubbles?:)

> > I'd expect to see lots of smaller vessels and brown water navy stuff

Probably these will operate all over the oceans, too. If you think in
scenarios somewhat smaller than full-out war, there is enough to do for
small-to-medium sized policing vessels. If you suspect a vessel of
exceeding
its quota of the shark-whale catch, or find that cruises liner has been
taken over by pirates, you don't really want a nuke from orbit as your only
option.

> > Most roles would be coast guard type S&R or Police work.

Which will be desirable all over the oceans.

> As long as ships transport goods, and the oceans remain mostly opaque

In fact, there are scenarios where bulk cargoes are shipped by submarines.
Subs need less energy than surface ships. Main problem nowadays is an
efficient airless drive - nuclear reactors are out of favor for civilian
shipping nowadays. Such cargo subs would, of course, be as different from war
subs as freighters are from warships. They would not need to dive very deeply,
nor would they have to be especially stealthy.

> Neutrino detectors will render all forms of nuclear propulsion for

Hardly. I know a bit about Neutrinos (did a Ph.D. on them, in fact). From
basic physics, there is no way you can detect neutrinos from a nuclear reactor
with any efficiency without a lot of mass (not neccessarily heavy
water). So your sub-detection sattellite will be HEAVY. Present-day (not
SF) neutrino detectors can define the direction from which the neutrino is
coming. But the resolution (again from basic physics) is so poor that you may
perhaps be able to detect the presence of a submarine within the search range
of a ASW plane, but little more. A neutrino detector is not the end of nuclear
submarines.

Greetings Karl Heinz