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I forget where I heard it, but in a discussion about stealth fighters and stealth capabilities, the conclusion of one person was that it was a game of material scientists vs computer scientists, and that in the end, computer scientists seem to be able to outpace material scientists.
Yeah, I saw a slightly different take saying that in the battle between stealth and detection, physics gives the advantage to the detection side. I have no idea what the justification was or even if it's remotely true, but it seemed like a plausible idea.
> Yeah, I saw a slightly different take saying that in the battle between stealth and detection, physics gives the advantage to the detection side.

You could boil this down to saying that moving things fast and stealth are fundamental tradeoffs.

The energy for the former has to come from somewhere, and at anything less than ideal conversion there are only so many places to hide the waste without compromising the latter.

The CS folks can iterate faster with software defined radios.
Some'big data' approaches to negating stealth include analysing holes that the aircraft create in the fabric of shortwave radio and cosmic background microwaves.

It does seem that the detection people have data and CPY on their side.

I'd suggest reading this article in full. I almost stopped when I read "big data" but it was a worthwhile article with some interesting thoughts on one potential future.

I agree that UUVs could play a big part in underwater warfare/intelligence gathering 10-20 years from now.

The model of "subs as aircraft carriers" for UUVs seems less likely, though. UUVs are arguably better deployed like satellites than aircraft. This is the way underwater mines are deployed today: seed an area well in advance of hostilities with mines that dig themselves into the bottom, and activate them remotely at need.

If you posit that submarines are going to be highly detectable (which is reasonable, and has been a risk since the '80's, when thermal signature tracking looked like it might become viable) then there's no particularly compelling reason why you would deploy UUVs from subs rather than from planes or surface ships.

Those are some great points.

For long term UUV deployments however you would have to deal with the "fuel problem." They will be more efficient than a manned submarine, and can be quite streamlined, but regardless moving water is expensive.

So, for example, dropping them into the water at Hawaii and expecting them to make it to China and back seems "unlikely" because anything large enough to have enough fuel to do that would also likely be detectable (which is the reason you aren't using manned submarines to begin with).

So maybe that's why they're talking about manned submarines as UUV carriers. So that the UUV can have batteries in them and electric motors, maybe 24 hours max of power, and only need to make it 1/8th of the distance otherwise.

Right, but then what is the point of making a submersible carrier as opposed to launching the UUVs from a traditional surface carrier. If your carrier sub is detectable, you aren't going to be getting it any closer than you could get your surface carrier. And I would expect the surface carrier to be easier to build, with more capabilities for self defense.
I believe the "subs as aircraft carriers" idea came from the fact that you generally want to interact with a target location on land. Nation states don't tend to have too many strategic targets underwater off their coasts.

Options for interacting with a target land location (dates extremely rough, in rough historical order): - Subsonic aircraft: outpaced by projectile-based anti-aircraft since ~1935 - Supersonic aircraft: outpaced and obsoleted by missile and satellite technology since ~1970 - Satellite: excellent for reconnaissance and elint, limited interactive capabilities due to treaty obligations - Subsonic cruise missiles (aka light missiles): limited range (relative to coastal approach), limited survivability against active anti-aircraft defenses - ICBM (aka heavy missiles): expensive, high risk of escalation due to detection, risk of nuclear payload, and ability to apply last minute target corrections - Carrier launched aircraft: limited range, limited survivability against active anti-aircraft defenses - Supersonic cruise missiles: limited range, limited survivability against active anti-aircraft defenses - Drones: limited range, limited survivability against active anti-aircraft defenses

You ideally want an aerial platform (freedom of movement, ability to interact with land targets), survivable in a hostile environment, as cheaply as possible.

This was solved by a carrier air wing.

However, the idea of A2/AD is to push the survivability line out far enough that the carrier can no longer approach close enough to let its air wing operate efficiently.

The obvious go to is to take a platform that can penetrate that A2/AD coverage to a greater depth with acceptable survivability. (It's a lot easier to hide a submarine than an aircraft carrier / it's a lot more expensive to build a submarine detection net across large ocean regions)

Then have that platform launch the equivalent of an air wing.

E.g. stealth submarines serving as carriers for limited-range (because that buys you design to make them stealthier / more survivable / faster) aerial drones

Your ICBM trade-off regarding corrections is outdated. Disarmament community has reported USN test administrators as stating latest W76-1/Mk4A LEP has introduced real-time GPS corrections throughout re-entry and terminal phase. A similar effort is underway to upgrade USAF RB's. Hypersonic aerodynamics and control research is going to pay dividends at some point, and apply to both hypersonic in-atmospheric and sub-orbital weapon control.

The "risk of nuclear payload" is only a severe problem if overflight is necessary. The RF would be able to assess that a non-overflying SLBM was not targeting RF territory as soon as it traveled through the radar nets. Obviously this is still probably a stupid weapon to use in a conventional context.

Detecting a sub is one thing, but destroying it is another. Do they have a 'solution' to that?
If they were hard to destroy, why would they care so much about being detected?
Actually, the game is pretty much up when the sub is detected. Destroying is the easy part.
This guy's premise is that submarines are going to lose their stealthy advantage. He is not qualified to say that, and the technology he mentions could become a threat to subs has been talked about for 20+ years. There is not much danger that these new technologies will be able to detect a sub in our lifetime.

I acknowledge that technology will require subs to become even more quiet, but new propulsion systems are now on the boats instead of propellers. They are quieter than ever and no one could detect us before.

Subs have already become “carriers” of SEALS and rockets. So that mission can only be expanded.

Not much new in the article.

Edit: Source: US Navy submarine nuclear reactor officer, 20+ years

>He is not qualified to say that,

What about Bryan Clark? Is he? http://www.defensenews.com/story/defense/naval/submarines/20...

>There is not much danger that these new technologies will be able to detect a sub in our lifetime.

Really? Are you qualified to say that?

Source: US Navy submarine nuclear reactor officer, 20+ years
I don't know you, nor do I know Clark, or any of the others,

>>"We need to think about a new strategy for undersea warfare," said Bryan Clark, a former submariner and Navy strategist now with the Center for Strategic and Budgetary Assessments.

This Clark guy, writing for DefenseNews claims to have been on a sub, and a place named the CSBA hired him. The trouble here is that I can't see why I should take either of yours or their assertions at face value. I don't know what their angle is, nor yours.

If you really where a 20+ year submariner then you should already know the screw is not the loudest thing onboard by a long shot. Also if you bothered to read the full article they are not using just sound to detect.

Granted this would only pertain to some of the current fast attack missions in regards to some countries. SEAL delivery is a relatively close up mission considering how big the ocean is.

Obsolete sounds a little strong. The denied areas for submarine operations will get larger, but the ocean is really big. Running the fixed and mobile sensor arrays to detect submarines is not cheap.

Regardless of the foreseeable improvements in submarine detection, they'll still be harder to find than surface ships.

Absolutely. Case in point: the missing Malaysian airplane is yet to be found.
That even had a transmitter, and wasn't designed to be difficult to find.
Right, but if they have to launch from the middle of the ocean, their advantage over ICBM's becomes much smaller, maybe none if they can't strike & destroy hostile C&C and launch sites. It is already a very small window of time that boomers are most useful for in a hot war. SLBM's utility in peacetime/pre-war is contingent upon people not knowing where they are.

OTOH, relying on ICMB's is contingent on enough people at SAC being sober, which may not be a safe bet.

Nuclear ballistic missile-armed submarines are considered second strike weapons, even though there are first strike scenarios for their use.

Their missiles don't have the range to hit launch sites that are far inland in North America or Eurasia. Even if they did the missiles would be vulnerable to anti defence. Additionally they are slow moving, which is very undesirable in first strikes.

However they can get really close to major population centers near the oceans and kill millions. Thus second-strike forces are supposed to act as deterrence. Area denial can make them much less effective if combined with proper air defence to take down the missiles.

What is your reference for this range assertion? OS intelligence says that US SLBM's can strike any target in Eurasia from either ocean. What is your reference for the assertion that Trident is vulnerable to ABM? RF has no operational ABM system capable of striking RB's entering at 8 km/s. Why do submarines have to move quickly to enable a first strike? Can't they just stealthily move into the exact position necessary days prior to launch? You should review what public data is available on Trident testing, because it contradicts every one of your assertions. The Trident equipment section has been observed conducting 14 distinct warhead release maneuvers in space. The largest warhead Trident can carry is estimated to have a 500kt yield. Trident is estimated to carry a max loadout to >7e3 km, and a reduced (treaty) loadout to >11e3km. It is also estimated to exhibit the precision necessary to guarantee kills against the latest Russian silos (envelop the silo structure within the earthen blast cavity). This means that the Trident fleet can strike and neutralize every counter-force target in Eurasia from defended waters. There is no "proper air defence to take down the missiles" in existence, and there is no indication that current ABM programs have any hope of defeating a MIRV'd fleet of solid fuel launchers.
Their missiles don't have the range to hit launch sites that are far inland in North America or Eurasia.

You're severely underestimating the range of SLBMs. The Russian RSM-56 can cover the entire continental US from both Saint Petersburg and Vladivostok.

>Their missiles don't have the range to hit launch sites that are far inland in North America or Eurasia.

This is just wrong. We're talking about ballistic missiles here, not cruise missiles. There isn't a spot on the face of the earth that can't be nuked by a sub from a safe distance.

>Even if they did the missiles would be vulnerable to anti defence.

Also mostly wrong. Only a handful of countries have any defense at all against an IRBM, those defenses only cover a tiny portion of their respective territory, and are both unreliable and relatively easily defeated.

>Additionally they are slow moving, which is very undesirable in first strikes.

Why? If I launch a missile hundreds of miles from enemy ships they're not going to find me. The only thing I have to worry about is a nuclear response, which is a hazard for any platform conducting a first strike.

>However they can get really close to major population centers near the oceans and kill millions.

If by "close" you mean 4000 miles. I guess it's a relative term.

>Area denial can make them much less effective if combined with proper air defence to take down the missiles.

Air defense that wasn't specifically designed to take down ballistic missiles won't have any effect at all.

You're confusing ballistic missiles with cruise missiles. The former are an order of magnitude more difficult to deal with from a planning perspective.

I think both you and dimtar are confusing SLBMs with cruise missiles. The Trident II has a range of over 4000nm, only half the Minuteman III ICBM's range, with a similar flight profile to the ICBM. SSBNs have a significant advantage in that they are mobile and to some degree hidden.

A first strike can target ICBM launch facilities and effectively neutralize them, meaning those birds either fly when the balloon goes up or they don't fly at all. SSBNs have to be hunted down and destroyed individually. This provides a retaliation capability that cannot easily be destroyed by a massive first strike. They are "second strike" in the sense that they will be available to respond to any nuclear attack, no matter how overwhelming, thus ensuring MAD remains an effective deterrent to nuclear weapons use.

Huh? The advantage of SLBMs is that they are enormously survivable. It doesn't matter where they are as long as they can't be taken out in a first strike, so they provide robust, highly credible retaliatory strike capability at all times. Modern SLBMs have more than enough range to maintain that from the middle of the ocean.
>The advantage of SLBMs is that they are enormously survivable.

Right but their survivability is contingent upon their not being detected.

Original report is located at http://csbaonline.org/publications/2015/01/undersea-warfare/. Much more informative than the national interest article.

Obsolete is definitely a little strong- the original report leans toward area denial for littoral operations and says nothing about almost nothing about Boomers.

The evolution of the submarine to an underwater mothership with UUV and other components is well underway, especially for littoral operaitons- see, for example the cancelled http://en.wikipedia.org/wiki/Advanced_SEAL_Delivery_System.

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Considering we cannot find a modern airliner that crashed into the sea I really doubt submarines will be all that threatened until a means to see through the atmosphere and sea is derived for satellites.

The real means to obsoleting boomers and other weaponized menaces is to create a world where the consumerism dominates any nation with sufficient means to go to war. Simply put, their population will demand everything but war.

The only threat to that is sliding backwards from a consumer driven economy to a state driven one like Russia is experiencing.

Here's the thing about submarines you may not realize: they are the trump card when it comes to nuclear warfare and keeping MAD in place. If one country "struck first" and tried to wipe out our nuclear silos, nuclear armed subs would retaliate. Given the surface are of the world covered by water, there are quite a few hiding places too.

What happens to MAD after we have a reliable way to detect subs? :/ Don't really know.

They aren't the sole trump card, that role is also played by manned bombers that can launch on warning from the middle of the without committing to bomb that targets, without even having the ability to arm their warheads (https://en.wikipedia.org/wiki/Permissive_Action_Link ); SLBMs are trump cards against undetectable attacks, or at least ones that can be detected in time, see for example https://en.wikipedia.org/wiki/Fractional_Orbital_Bombardment...

You'd also have to be very confident in your ability to carry out a first strike. Ah, and there's a quick fix, a limited ABM deployment (we've got them and are pretty confident they work). Since you can't pick which warheads get taken out by the ABM systems, the difficultly becomes massively greater.

Note also that historically only the US believed in MAD, the Soviets correctly thought it was unmitigated evil. Then again, they had to accept it....

Yep. MIRV's also make it incredibly hard for any kind of "Missile Defense".

https://en.wikipedia.org/wiki/Multiple_independently_targeta...

I didn't clearly state my case.

A first strike requires reliably hitting a bunch of targets, often on a schedule. If your intended target has a possibility of randomly (from your viewpoint) taking out some fraction of these incoming warheads, how much more complicated does that make your plan?

If you're talking about protecting a target (nation) from an attack, then "Missile Defense" shouldn't even be your first line of defense. Civil Defense is to protect the people's lives, anti-missile defenses to protect their possessions and those who don't make it to a shelter in time.

No ABM system has demonstrated success against either MIRVs or deployed PENAIDS (much less 53T6), but more to the point BM's of any sort are not a first strike weapon (given US and RF radar nets, 24/7 US launch detection capability, and part-of-the-day RF launch detection capability).

If the US has a first strike weapon, it's a fleet of nuclear-capable stealth bombers employing GPS-guided laydown-capable munitions, coupled with a pretty nasty set of eyes in the sky to find mobile launchers. F-35 is also stealth and MAY get a B61 interface to replace NATO Tornados and F-16s, etc.

Not to mention that over the next 20 years, it seems very likely our nuclear delivery options will expand to the UAV field in some manner or another.

And we'll also see advances when it comes to very long range, hypersonic strike weapons that can carry nuclear payloads (Prompt Global Strike, you can bet they'll be able to slap a small nuke on it, whether they openly admit that or not).

This is outdated information. FOBS are not deployed, and there are no US/NATO aircraft on alert. I don't know who you are speaking for regarding confidence in ABM's, but it's not the community of technical professionals that analyze strategic defense and deterrence. SLBM's are not a trump card, since if they are what you are relying on for counter-strike, your nation has been annihilated.
This article wasn't talking about Boomers, like the Ohio Class, which can go hide in the middle of the ocean, but attack class submarines, which need to get up close to their target. The theory is that with more advanced detection technology, you can blanket an small area with sensors, and deny that small area to an attack submarine.

This has no implications for MAD.

To extend this, the US attack submarine has seen mission creep from suppressing the opponent's missile submarine; directly engaging the opponent's attack submarines to protect friendly boomers; and harrying the opponent's capital naval and merchant fleets. With the end of the Cold War, US attack submarines have been increasingly deployed out of blue-water roles for which they are truly suited.

Industrial inertia more than increasing opponent capability has been the driving force behind continued maintenance of a substantial attack submarine fleet via the development of replacements for the Los Angeles class...somehow the reduction in boomers to hunt for didn't mean significantly fewer attack submarines and there are more in service now than at the turn of the millennium.

I've always considered them to be a "trump-card" against any developments that negate surface craft.

Suppose in a future "Battle of the Taiwan Straight" the PRC makes it sufficiently unhealthy that our carriers can't support the ROC? And things are marginal for the destroyers we can spare? If they can't also negate the attack subs....

I would cut the carrier force before I'd cut the attack subs.

At the danger of starting something political, I don't think the US can win a war with China in the Taiwan straight regardless of fleet composition. China is not Iraq in terms of signals intelligence, electronic warfare capability, and nuclear arsenal. Never mind financial and political wherewithal.

The Chinese were more than a match sixty years ago to the point that MacArthur was fired over wanting to go hot with the nukes. Their strength relative to that of the US has only increased in the interim. In addition the US's interests are less aligned with those of 中國國民黨 with each passing year. The Koumintang lost the civil war and communism has been replaced by other bogeymen.

The reality is that the US is at best in position to broker a reasonably peaceful solution along the lines of the British transfer of Hong Kong.

Against the US of that time (Truman disamement resulted in the military buying back "surplus" recently sold), the US Army of that time (read the chapter "Proud Legions" in This Kind of War), against one of the most overrated generals in US history ... they "were more than a match". So were the North Koreans prior to Ridgway taking command of the 8th Army and e.g. our cracking the problem of the KPA's T-34s. The Marines, on the other hand, hadn't devolved like the Army, and their story was very different.

Even then, with the PRC entering the war rather late in the game, the total for the war kill ratios were 1-3 in our favor.

The ability of the ROC and the US to win such a modern battle of the Taiwan Straights depends on too many unknowns for us to make any solid predictions right now. How much of Taiwan is the PRC willing to destroy to capture it? Can a clever attack by air avoid the "million man swim"? Will we even have enough time to mobilize, or would it be a a Bolt Out Of the Blue attack? Would they even try if the new PRC leadership starts failing hard on the mainland? Or might that prompt them to try, but perhaps badly? Would we even try if Obama was still President?

As for "a reasonably peaceful solution", I don't see that even being a possibility with the new leadership's program of repression.

> What happens to MAD after we have a reliable way to detect subs? :/ Don't really know.

Also, what happens if one side develops or believes they've developed that capability, and the other doesn't know? For example, a surprise attack to forever end U.S. power could be very tempting to competitors. They may decide they never will have a better opportunity, to grab the brass ring and do something historic, or that their odds are better in a surprise attack than in some expected future conflict.

I see many responses dismissing your concern. How much are they willing to bet on those theories? The future of humanity?

Pretty ironic that the subheading of the article says, "They could simply become the next battleship." Battleships would be an awesome asset today if we hadn't scrapped them. Their main guns can put 2500 lbs of ordinance on targets 40 km away. Think of what that capability would look like these days with GPS guided rounds. America's ability to project force in the littorals is worse-off for not having maintained battleships in the arsenal.
Battleships are expensive, with little flexibility for the types of missions they can do.

The Navy wants railguns. Eg, http://www.wired.com/2014/04/electromagnetic-railgun-launche... :

> The Navy likes the weapon for several reasons, not the least of which it has a range of 100 miles and doesn’t require explosive warheads. That makes it far safer for sailors, and cheaper for taxpayers. According to the Navy, each 18-inch projectile costs about $25,000, compared to $500,000 to $1.5 million for conventional missiles.

http://www.onr.navy.mil/en/Science-Technology/Departments/Co... says there's a goal of 10 rounds per minute.

These don't need to be on battleship. Here's one on a destroyer. http://news.usni.org/2015/02/05/navy-considering-railgun-thi...

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