[ericmay]

Well it would be the U.S. Navy, but not quite. First, how do you even locate the carrier groups? Let’s say you do get lucky and find them. Ok. Now let’s say you launch missiles - ok the carrier group can move and also shoot down missiles. Oh and once you do launch those missiles you’ve committed to a big time war, and you’re open to counter-attack by American forces - not just the carriers but also land-based strike forces.

It’s not like the United States is sitting around saying well jeez I guess China built these missiles and we can’t do anything.

[hef19898]

Locating carriers to day? Easy, satellites and radar. Tag the group leaving port, track it 24/7. Or sonar. The days a surface fleet can hide are gone.

[ericmay]

Ok let’s say you have a satellite and you somehow find US ships. Then what?

And how far is the radar range? Can you truly detect ship signatures with radar without the CSG being out of your range? Maybe a war started and the USAF bombed the Chinese radar stations? Idk.

Anyway, let’s say you launch missiles. Ok? Ships move. Ship missile defense shoots down some missiles, etc.

Now what do you do?

Idk why people think that the U.S. Navy hasn’t considered these things. As if China is going to just build some missiles and launch them and that’s that. Whenever you think things are that easy, you should wonder if you have a grasp on the scenario.

[kovacs_x]

I'm sure all the US carriers are accounted by China 24x7 already! :D

+ if I had to bet, then I'd bet that modern submarines, smart mines & rockets can take out any carrier, ship or whatever, it's just that no one has done it yet for obvious reason of not starting a new WW. It's stealth & speed that gives an edge these days, instead of displaying big, slow chunks of metal in a middle of big swaths of water + even 1 "missed" rocket can make the any ship incapacitated or sunk.. & now imagine 100 hypersonic missiles launched as a swarm.

Imo carriers and ships in general are the "battleships of WW2" (considered supreme, failed miserably). Yes, still works against small countries, with limited capabilities and as a "display of power", yet practically I'd assume they'd be sunk during the first days of a REAL full scale conflict. One should never forget the level of technology during WW2 compared to these days.

ps. it's interesting that China is always considered agreesor, though it's the US that's been involved (directly & indirectly) in most of the wars of the 19th, 20th & 21st century + is the TOP1 seller of the weaponry in the world as of today.

[RugnirViking]

> And how far is the radar range? Can you truly detect ship signatures with radar without the CSG being out of your range?

yes.

> Anyway, let’s say you launch missiles. Ok? Ships move. Ship missile defense shoots down some missiles, etc.

ships move means nothing at all, the missiles are tracking the ships with radar. missile defence shoots down some missiles yes, but usually the idea with these types of attacks is overwhealimg air defence systems with volume of fire, so you fire on the order of 30 missiles at once, and use a probabalistic attack to ensure one or two make it through

Overall, you seem to be the one that isn't very up-to-date. Missiles have been around for almost 80 years, but people are saying things are different now - maybe have a look into why. Hypersonic boost glide missiles can manouver sharply, travel at speeds of up to mach 5, have next to no radar signature, and can time their attacks and manouver such that they come at a carrier group from all angles at once. Many people in the pentagon are sounding the alarm - the Undersecretary of Defense for Research and Engineering recently said that such weapons hold carrier groups at risk, and ordered a review into how to defend against the threat. The department of defence has said several times that hypersonics are their "top priority". Just because you don't hear them besides themselves in the media doesn't mean they aren't seriously concerned, but this kind of thing naturally tends to be kept muted in order to not make it obvious if they are defenceless.

The biggest saving grace is that the current systems of this technology have on the order of 1000kms range. terrifying, but can be worked around. However, that range will inevitably increase with time.

[ericmay]

> ships move means nothing at all, the missiles are tracking the ships with radar. missile defence shoots down some missiles yes, but usually the idea with these types of attacks is overwhealimg air defence systems with volume of fire, so you fire on the order of 30 missiles at once, and use a probabalistic attack to ensure one or two make it through

I think you're misunderstanding how these missile systems work and overestimating their ability to "lock on" - it's not a video game where they have near-perfect accuracy.

> Hypersonic boost glide missiles can manouver sharply, travel at speeds of up to mach 5, have next to no radar signature, and can time their attacks and manouver such that they come at a carrier group from all angles at once.

Launch of these missiles can be detected by U.S. space-based assets via their thermal signatures, so the CSG would probably know they are coming (obviously anything can happen in war and maybe this doesn't happen, but it's likely to be detected).

Once detected the CSG can begin evasive maneuvers - spreading out for example. These ships are pretty quick and even small course adjustments may render the missiles ineffective. While the hypersonic missiles can adjust in-flight somewhat, it's much more difficult to be accurate with them. Think about it - they're launching missiles from hundreds of miles away to hit tiny ships in a gigantic ocean at a high rate of speed and those ships can shoot some of the missiles down (or at least the research is being done) and move around. It's difficult for the missile to adjust.

Think about it like this: China launches these missiles, and they're very fast but they're detected. USN ships start immediate evasive maneuvers. They don't have much time, but the missile is so fast it also doesn't have much time to adjust. It's never "locked on" in any sense you may be thinking. So can the ships get out of the way? A near miss might as well be a miss by a million miles. It remains to be seen.

There's also something to consider that they aren't cheap, and there aren't very many of them. These aren't simple cruise missiles, and a Chinese launch of such hypersonic missiles is likely to not be a repeatable attack - even so you open the launch sites up to response from the CSG or air assets from other locations. In many war game scenarios I've read, China essentially launches all of the missiles and damages USN assets in the region, but the U.S. just brings more while also retaliating and destroying Chinese assets. A quick and violent war is the best hope that China has (maybe the U.S. will back down) - but long term it loses a war of attrition based on the chess pieces and what's on the board.

So even if China launched missiles and they were wildly successful, it's not going to end the war but at best buy China some time and a moral victory.

Overall, I highly question the ability of Chinese capabilities to effectively track and put missiles on targets. These capabilities will probably improve over time (unless the Chinese nation collapses due to economic factors) which will basically mean that the U.S. will think twice before attacking China due to a serious concern about damage to naval assets.

> The department of defence has said several times that hypersonics are their "top priority". Just because you don't hear them besides themselves in the media doesn't mean they aren't seriously concerned, but this kind of thing naturally tends to be kept muted in order to not make it obvious if they are defenceless

When you read articles about the U.S. military "sounding the alarm" I would not take that at face value.

As an aside - if you're interested in further reading the Rand Corporation and others put out some pretty fascinating in-depth discussions about topics like these.

[RugnirViking]

Missiles are not targeted at a location. They absolubtely do "lock on" and can track a moving target. They would simply not be able to function if that were not that case. Why even use a missile at all if it worked like that, just fire a big gun. Sure there are countermeasures, but manouvering a ship won't do anything on its own. The only way things like that help is when combined with chaff or heat signature dummies.

What makes you think that tracking a ship the size of a skyscraper would be difficult but that tracking a missile would be easy? Yes, the US satelite network will soon be able to detect this type of missile launches, they are working on that capability right now - I never said ships wouldn't know that they are coming, just that there is little they can do with that information if more than one or two missiles are launched.

You seem to be vastly underestimating how well these missiles can manouver. They can't adjust "slightly", they can make sharp turns, with many times more g-forces than a regular plane - a ship has no chance to outmanouver them, any manouvers would only be to present a lower profile to a single missile or to try to confuse the missile's tracking system using some other countermeasures

as for reading articles about the millitary "sounding the alarm" how does the dod itself sound https://www.defense.gov/Explore/News/Article/Article/1934290...

Finally cost. Yes these missiles are expensive but that is several orders of magnitude lower than an aircraft carrier. Heck, its orders of magnitude lower than a single plane on that carrier

[ericmay]

> Missiles are not targeted at a location. They absolubtely do "lock on" and can track a moving target. They would simply not be able to function if that were not that case. Why even use a missile at all if it worked like that, just fire a big gun. Sure there are countermeasures, but manouvering a ship won't do anything on its own. The only way things like that help is when combined with chaff or heat signature dummies.

I don't think this is correct with ballistic missiles or these hypersonic missiles - please correct me if I'm wrong. My understanding is that it's not like a fighter jet locking on to a target and firing a missile. When these missiles are fired they are launched into a general area - in this case where the Chinese think the U.S. Navy ships are, and then after that the missiles will lock on to a target as they re-enter the atmosphere - they have a few seconds to adjust course and do so. They can miss.

> You seem to be vastly underestimating how well these missiles can manouver. They can't adjust "slightly", they can make sharp turns, with many times more g-forces than a regular plane - a ship has no chance to outmanouver them, any manouvers would only be to present a lower profile to a single missile or to try to confuse the missile's tracking system using some other countermeasures

What I'm not saying is the U.S. Navy can just run away or something from the missiles once they are in range, but the ships can move and the missiles can miss.

> as for reading articles about the millitary "sounding the alarm" how does the dod itself sound

It doesn't sound like anything - it's no different. These are just reports that come out form the bureaucracy. The DoD sounds the alarm on all sorts of things.

https://www.ausn.org/post/navy-sounds-the-alarm-on-biden-s-d...

> Finally cost. Yes these missiles are expensive but that is several orders of magnitude lower than an aircraft carrier. Heck, its orders of magnitude lower than a single plane on that carrier

Cheaper than a carrier but dunno about planes. Maybe the cost can come down over time if they aren't already cheaper.

Also in the grand scheme of things the US Navy can just stay out of their range and harass supply lines, and then U.S. forces in the region can attack these missile systems and destroy them, then the US Navy can move in.

The main concern really isn't these missiles. They present a problem, of course, because they make it difficult for the U.S. Navy to effectively operate in the region (and by effectively operate we mean unimpeded), but they aren't an ace in the hole or some sort of trump card that the Chinese have.

[jabl]

> First, how do you even locate the carrier groups?

Perhaps by these SAR satellites China has been launching? SAR satellites have AFAIU been fairly effectively miniaturized recently, enabling a wannabe-superpower like China to send up hundreds or even thousands of them if they want to, making it infeasible to destroy them all cost-effectively at least with today's technology.

I'm not sure what the current level of coverage these things have, but it seems that today the technology exists to track surface naval assets day and night, and through clouds, at a somewhat affordable cost (for a superpower wannabe). So the trick of hiding a carrier battle group in the vast ocean might no longer work.

> the carrier group can move and also shoot down missiles.

Considerably more difficult for ballistic missiles. I would also imagine that missiles in principle could be relatively affordable if they were mass-produced; today they are expensive because they are expensive to develop and there's no demand for a huge number of them. So you could saturate the defenses with enough missiles that even if many were shot down, at some point a sufficient number of them are going to get through.

> Oh and once you do launch those missiles you’ve committed to a big time war, and you’re open to counter-attack by American forces - not just the carriers but also land-based strike forces.

Of course, but that goes the other way as well; if those carriers launch strikes against a big modern opponent you're also in for a big time war. I just hope neither side commits such a folly.

> It’s not like the United States is sitting around saying well jeez I guess China built these missiles and we can’t do anything.

Of course not. Then again, China probably doesn't build those missiles because they think US carrier groups will easily shoot them down. Both sides certainly have smart people, as well as ossified bureaucracies gunning for the last war.

Note I'm not saying the time of carriers is gone. But it's been 80 years since carriers became the kingmakers of naval force projection, and technology has developed quite a bit since, and there (luckily!) has been no major conflict testing out these new developments. I just think it's foolish to be very certain one way or another.

[ericmay]

> Perhaps by these SAR satellites China has been launching? SAR satellites have AFAIU been fairly effectively miniaturized recently, enabling a wannabe-superpower like China to send up hundreds or even thousands of them if they want to, making it infeasible to destroy them all cost-effectively at least with today's technology.

Sure it's possible. I think it's challenging overall but it seems neither of us are completely sure.

> Considerably more difficult for ballistic missiles.

Kind of. Ballistic missiles follow a predictable trajectory - the difference is these hypersonic missiles while mostly following predictable trajectories they can adjust a little bit more at the last second to hit a target.

> I would also imagine that missiles in principle could be relatively affordable if they were mass-produced; today they are expensive because they are expensive to develop and there's no demand for a huge number of them. So you could saturate the defenses with enough missiles that even if many were shot down, at some point a sufficient number of them are going to get through.

Potentially, but then the U.S. may have its own counter-measures. As I think about the costs, the cheapest the cruise missile got to was around $1,000,000. So I wonder how cheap you can make hypersonic missiles in order to create enough of them? They'd have to be hypersonic too b/c the U.S. is likely shooting down others that get too close to the CSG.

But also, what if China goes and builds all these missiles for a war that never comes? Or rather, what if the U.S. just keeps the fleet out of range and just chokes off Chinese supply lines from the sea?

> Of course not. Then again, China probably doesn't build those missiles because they think US carrier groups will easily shoot them down. Both sides certainly have smart people, as well as ossified bureaucracies gunning for the last war.

I agree.

> Note I'm not saying the time of carriers is gone. But it's been 80 years since carriers became the kingmakers of naval force projection, and technology has developed quite a bit since, and there (luckily!) has been no major conflict testing out these new developments. I just think it's foolish to be very certain one way or another.

My bias here is not so much with carriers or the U.S. Navy but by overestimating these missiles and their effectiveness. Whenever I hear all of the armchair generals talking about something (myself included) I immediately have to wonder how we're wrong and why we're wrong. It's like everyone predicting the next market bubble - they latch on to a relatable idea (China has so many missiles they can blow up all of our ships) and stick to it and then barely question that assumption.

[jabl]

> Sure it's possible. I think it's challenging overall but it seems neither of us are completely sure.

I have no idea about the exact capabilities of the Chinese military SAR satellites. But considering that a dinky little startup with a few tens of millions in funding like Iceeye is able to launch half a dozen smallsats with SAR's that have been used for, among others, tracking fishing vessels that have gone dark (shut down their AIS transponders), it seems almost obvious that a high-tech wannabe-superpower would be able to launch boatloads of similar things in order to track foreign naval surface vessels.

> Kind of. Ballistic missiles follow a predictable trajectory - the difference is these hypersonic missiles while mostly following predictable trajectories they can adjust a little bit more at the last second to hit a target.

I was thinking of this supposed Chinese anti-shipping ballistic missile (DF-21D) that has some mid/late course correction ability. The hypersonics everybody is excited about these days are of course a further step ahead of these kinds of things. But yes.

> They'd have to be hypersonic too b/c the U.S. is likely shooting down others that get too close to the CSG.

I think a stealthy subsonic (subsonic for fuel economy enabling long range without having to boost (almost) out of the atmosphere like a ballistic or hypersonic) missile could be an interesting design point - with a supersonic terminal stage. Not sure if such things are on the drawing board anywhere.

> But also, what if China goes and builds all these missiles for a war that never comes?

The same accusation can be leveled at all military spending. What if the US builds a dozen carriers and accompanying battle groups and a war never comes (not counting bombing some 3rd world tinpot dictator)? Oops, the US already did that. You can of course say they provide deterrence or whatever, but so can the Chinese.

> My bias here is not so much with carriers or the U.S. Navy but by overestimating these missiles and their effectiveness. Whenever I hear all of the armchair generals talking about something (myself included) I immediately have to wonder how we're wrong and why we're wrong. It's like everyone predicting the next market bubble - they latch on to a relatable idea (China has so many missiles they can blow up all of our ships) and stick to it and then barely question that assumption.

Fair enough. It's easy enough to get carried away speculating on the capabilities of weapons systems which are closely guarded state secrets.