Tag Archive for: naval capabilities

Why attack missile boats can’t replace major warships

Attack missile boats are no substitutes for the Royal Australian Navy’s major warships, contrary to the contention of a 4 February 2025 Strategist article. The ships are much more survivable than attack boats and can perform long-range operations that small vessels cannot.

In the article, the author argues, for example, that a single missile hit could cripple a billion-dollar warship. In fact, this is highly unlikely.

The planning for the number, type and direction of travel of missiles needed to successfully engage a warship is a tactical art. The calculations are classified, but the Salvo Equation is an unclassified means of understanding how many missiles must be fired to damage a major warship, such as a destroyer or frigate. The number is greater than most people assume.

The debate on warship survivability isn’t new, and it remains paper-thin. Warships are designed to float, move and fight. As the RAN’s Sea Power Centre describes, they are survivable ‘through layered defence systems, signature management, structural robustness and system redundancy’.

Just because a missile is fired doesn’t mean it will strike, and even a strike doesn’t ensure the ship is disabled.

It’s true that threats to warships close to coasts have increased, and the proliferation of uncrewed aerial vehicle, uncrewed surface vessels and anti-ship missiles has made operations more complex. However, as offensive threats evolve, so do defensive capabilities, tactics and procedures. This is the dance of naval warfare.

To bolster the flawed claim that warships are ‘increasingly vulnerable in modern conflicts’, the article points to the 42-year-old, poorly maintained Russian cruiser Moskva, which Ukraine sank in the Black Sea in 2022, as a ‘most advanced warship’. Yet far more modern US, British and French warships have repelled more than 400 Houthi missile attacks in the Red Sea since 2023 without sustaining damage. Fourteen months of Red Sea operations show that well-armed warships with trained crews are highly effective.

The article conflates strategy with concepts, saying ‘the urgency of shifting Australia’s naval strategy to distributed lethality cannot be overstated’.

Think of a naval strategy as the big-picture plan for what a nation aims to achieve at sea with its naval capability (as opposed to maritime), while a naval concept is the theoretical framework that explains how its navy might actually fight and operate to achieve those goals.

‘Distributed lethality’ fits within the established concept of Distributed Maritime Operations, which isn’t about any particular category of vessel, large or small; it’s a way of fighting that emphasises massed effects through robust, networked communications that allow for dispersal of maritime units.

At its core, it’s a network-centric, not platform-centric, concept—as applicable to a fleet of frigates and destroyers as to smaller craft.

It’s a concept the RAN, at least in theory, has already embraced. In a 2024 speech on Distributed Maritime Operations, Fleet Commander Rear Admiral Chris Smith said ‘distribution as a core concept of our operations … seeks to manage a defensive problem while seizing an offensive opportunity’.

Australian naval strategy: reach and balance

In advocating for a shift towards attack boats, the article dismisses their limited range and endurance as problems that are easily fixed. They are not: range and endurance are fundamental to Australia’s naval strategy and central to the concept of reach.

At its core, reach is the requirement for a maritime power to be able to protect its vital interests at range from its territory. As an island nation dependent on long sea lines of communication for essential seaborne supply—from fuel to fertiliser, ammunition and pharmaceuticals—Australia needs an ability to protect critical imports and exports.

Doing that requires the combination of sensors and weapons that cannot fit into an attack boat: heavy and bulky towed-array sonars, large radars mounted high, long-range air-and-missile defence systems, and helicopters for hunting submarines.

Acceptance that Australia’s vital interests at sea are far from its coast is inherent in the roles ascribed in Australia’s National Defence Strategy. They include power projection, such as the capabilities of the Australian Army’s new amphibious fleet, which require protection that attack boats can’t provide.

Limited endurance and operational range are deficiencies that cannot be mitigated by basing in northern Australia, as the article suggests. Territorial force posture such as northern operating bases cannot transform coastal green-water naval assets such as attack boats into the open ocean blue-water capability Australia requires.

Another key strategic requirement for Australia is having a balanced fleet, anchored by larger destroyers and frigates. The essence of the idea of a balanced fleet is that a smaller fleet of ships must operate across the spectrum of maritime tasks. Attack boats cannot fight effectively in all three spheres of maritime warfare: surface, air and sub-surface. While they may complement frigates and destroyers where the budget allows, they are unsuitable to form the backbone of Australia’s fleet.

The call for such vessels falls into the common trap of thinking that modern naval warfare is simply about missile capability. But what is needed to constitute a balanced fleet is a mix of capabilities that can be brought together only in a frigate or larger ship.

This debate is an opportunity to highlight a crucial issue often overlooked in Australian strategic thought. The country needs a naval strategy with genuine reach and a balanced fleet, capabilities that simply can’t be met by a force built around attack boats.

Navy faces strategic risk of ageing capabilities

There will be much celebration of the Royal Australian Navy’s achievements at this week’s Indo-Pacific Sea Power Conference and maritime exposition. They are significant. Five years of Indo-Pacific Endeavour activities have demonstrated the navy’s ability to generate a robust taskforce and sustain it on extended deployments, and the upgrades to the Anzac-class frigates have provided a welcome boost to their capability.

But there are very dark clouds on the capability horizon. We are facing the strategic risk of both of the navy’s core combat fleets ageing out before replacements arrive.

Even before the Attack-class submarine program was cancelled many observers raised concerns about the viability of a transition that would see each of the Collins-class boats well into their 40s before they were replaced. Short of schedule miracles, the transition to a nuclear-powered submarine only exacerbates the risk. How will the navy generate many more submariners with a fleet of ageing conventional submarines?

Even if the Collins fleet can reliably get to sea, it’s hard to see it providing a robust deterrent into the 2040s. If the Attack was going to be obsolete when it was launched in the mid-2030s, as Scott Morrison has stated, how can a design that’s 40 years older do better?

The frigate situation is nearly as serious. The Anzacs might not be quite as old as the Collins when they are eventually replaced by the Hunter-class frigates, but they will always be limited by their small number of missile cells. A ship with eight launch cells coming up against ships with 64 or 96 is taking a knife to a gunfight. Unfortunately, the Hunter will only have 32 once it starts to enter service in the mid-2030s despite an acquisition cost of $45 billion, making it extremely poor value for money.

To embark on a highly risky transition with one of your combat fleets is dangerous; to do it with both simultaneously is careless.

While the government has delivered the increased funding it promised in the 2016 defence white paper, it is not being turned into capability. If you want to understand what’s going on with its delivery, follow the money; if you’re not spending money, you’re not getting capability.

The navy’s acquisition spending should have ramped up dramatically as the submarine and frigate programs matured. That was indeed the plan in 2020–21 defence budget, but it will fall dramatically short.

For the four years from 2020–21 to 2023–24, the navy’s acquisition spending will be $5.3 billion less than the $17.8 billion it was aiming to spend across those years.

In addition to the dollars not spent, there are the dollars spent for no capability return, most notably the $3.2 billion outlaid on the Attack program, with more to come once the financial settlement with Naval Group is finalised. It’s not just the wasted dollars, it’s the wasted time—something we can’t afford when, by the government’s own admission, our warning time has evaporated.

Certainly, the navy is acquiring new systems such as more modern missiles and drones, but there’s only so much it can do with the same ships.

Proposals to put Tomahawk land-attack missiles on the Hobart-class destroyers and Collins submarines have an air of desperation; the number of missiles that could be installed wouldn’t deliver a meaningful military effect and would take away weapons from the vessels’ other roles. It’s astounding that despite the government’s planned investment of $575 billion on defence this decade, the navy’s plan is not getting a single additional missile launcher to sea, let alone a new warship.

So, what’s to be done? Whoever wins the election will face tough decisions. The government will need to consider a wide range of options, many of which should come from outside the Department of Defence, which is clearly incapable of generating fundamentally new ideas.

A first step is to build on success. The one domestic shipbuilding program going well is the 1,800-tonne Arafura-class offshore patrol vessel. Unfortunately, it brings virtually no lethality to the fight as it’s currently configured. Nevertheless, the navy has steadfastly resisted calls to explore putting anti-ship missiles or towed-array sonars on them. But as we can see from the Ukraine war, when you are in a desperate fight, every little bit of capability helps. It’s also shown how a small number of anti-ship missiles can have a dramatic effect.

There are tough conversations to be had about the frigate program where we need to implement a Plan B. That may involve cancelling the Hunter and acquiring a different vessel, or continuing with the Hunter but also pursuing additional vessels, such as more Hobart-class destroyers.

These solutions may require significant parts of the work to be done overseas to get capability quickly, but another lesson from Ukraine is that in a crisis you accept help from wherever it may come.

There are similar conversations to be had about submarines. Again, pursuing additional capability quickly doesn’t necessarily mean abandoning the future nuclear-powered attack submarines enterprise. But as potential threats get closer to Australia, smaller, affordable conventional submarines that can operate stealthily in the archipelagos to our near north look increasingly attractive as a gap filler.

Other solutions involve relying less on large, complex warships that take decades to design and build and involve major cost, technical and schedule risk.

Exploring ‘mosaics’ of smaller, less complex systems requires different thinking and appetite for risk. The recent announcement that Anduril has been funded to rapidly develop an extra-large autonomous undersea vehicles suggests that this approach is starting to take hold in Defence (likely with some forceful prompting from Defence Minister Peter Dutton).

There are no easy solutions. The first step is to acknowledge we have a serious problem that will only get worse. It’s not tenable to simply repeat the mantra of holding course and managing the (hopefully) graceful degradation of the Anzac and Collins fleets until their replacement is complete in the late 2040s.

Potential adversaries are not going to wait 25 years.

Simulating anti-submarine warfare

Anti-submarine warfare (ASW) is an arcane science (and perhaps its practitioners prefer it that way), but it’s an incredibly important part of naval warfare. It’s also notoriously difficult—like trying to find the needle in a proverbial haystack—except that the needle might be trying to kill you. But as a rule of thumb, an effective ASW strategy uses assets to efficiently search the greatest volume of water possible in a given period of time.

Large surface combatants are slow at the best of times, and during ASW operations they move even slower to reduce noise. But the ship’s embarked ASW helicopters can move quickly, drop sonobuoys from the air, and deploy powerful dipping sonars. They can also carry torpedoes, disaggregating the entire kill chain from the warship.

It would be hard to overstate the value of aircraft to an ASW mission, but it can also be hard to demonstrate quantitatively. To that end, I conducted a series of simulated ASW scenarios using the program ‘Command: Modern Air/Naval Operations’, a spiritual successor to the classic (and realistic) Harpoon series of military-style simulators.

The test scenario isn’t meant to be ultra-realistic; it’s a 2,000nm2, deep-water arena, in which a submarine (red team) and a surface vessel (blue team) are hunting each other, with no time limit. The intent of the tests was to investigate the impact of having more helicopters on an ASW mission, rather than evaluating specific surface platforms. Don’t believe the numbers that come out—the scenario is artificial, and almost certainly skews the results in favour of the ASW side by boxing the submarine in—but you can believe the relativities.

The blue team embarks one or more MH-60R Seahawk ASW helicopters. The number of helicopters is dependent on the platform; one Seahawk on the Australian Hobart-class AWD, two Seahawks on the US Navy Arleigh Burke Flight IIA, and four Seahawks on the Australian Canberra-class LHD. All the platforms on each side patrol the mission area at random vectors until they detect an enemy and follow the kill chain through to conclusion.

A win for blue is defined as successfully defeating the enemy submarine while the surface ship remains intact. A draw is when both sides’ vessels are destroyed, usually because an already airborne helicopter drops a torpedo on a submarine after that submarine has destroyed the surface ship.

The baseline scenario tests an AWD with no helicopter onboard against a US Navy Virginia-class SSN. In that case the AWD loses every time. That’s not surprising; even when both vessels detect each other, the submarine’s Mk48 heavyweight torpedo has twice the range of the AWD’s MU90 lightweight torpedo, so the submarine can always pick the AWD off at a comfortable distance. (In fact, across all test scenarios, anti-submarine kills were always achieved by a helicopter-launched Mk54 torpedo.) ASW with no airborne sensors is a one-way mission for a surface combatant.

The AWD with a single Seahawk provides the bare minimum in airborne ASW capability, and wins outright 30% of the time and gets sunk 65% of the time. In comparison, an Arleigh Burke with two Seahawks, wins 60% of the time and gets sunk in 20% of trials.

The program models Seahawk sorties at a little under three hours duration, with a turnaround time of about four hours between sorties. That means the AWD has a Seahawk in the air just 40% of the time, while the Arleigh Burke has one in the air closer to 80% of the time. Even when the submarine manages to sneak a kill, there’s usually a Seahawk in the air that can use the surface ship’s final sensor data to even the score. (Some versions of the Arleigh Burke also include the ASROC rocket-launched torpedo, which results in more ‘draw’ scores, but in the interest of fair comparison to the AWD, I didn’t include ASROC).

The success rate increases again with the addition of more Seahawks, though not by much. The LHD scenario includes four Seahawks, three of which are on rotation so that one is in the air at all times, with the fourth flying when available. The results are all either win or loss, because the LHD has no sonar system that can see a torpedo coming. That means, unlike the AWD or Arleigh Burke, the airborne Seahawks can’t be cued by the LHD.

The final scenario tested whether a Collins-class SSK would fare any better than the Virginia SSN did against the LHD with four Seahawks. It turns out that the Collins was a little harder to detect than the Virginia, which is consistent with conventional wisdom that diesel-electric submarines tend to be quieter than their nuclear-powered counterparts.

The point of this simulation series wasn’t to attempt to recreate realistic operational scenarios, but to test the importance of ship-borne ASW helicopters to ASW. The conclusion is unequivocal (and not surprising): a surface vessel with two helicopters is going to be much better at ASW than a ship with only one. And the fact that an LHD, with no organic ASW sensors, but with four Seahawks performs even better than an Arleigh Burke with two tells you that ASW helicopters are probably the most valuable ASW capability you can put on a ship.

Committing to an Australian defence industry

Labor has long held the view that a significant defence industry not only provides high end manufacturing jobs to Australians but also adds to our nation’s sovereign capability. It serves a strategic purpose.

During the Second World War the idea of sovereign capability saw Australia manufacture an aircraft: the Wirraway. In a contemporary sense, with complex global supply chains which make it impractical for Australia to totally manufacture much of the equipment our armed forces require, the idea of sovereign capability was set out in the 1987 Defence White Paper:

‘The capacity to maintain, repair, modify and adapt defence equipment to the Australian environment, independently of overseas sources, is of fundamental importance for our combat effectiveness in all levels of conflict.’

A commitment to an Australian defence industry has never been a part of the Coalition’s DNA. They’ve never had a preference for Australian-made equipment. The first term of the Abbott–Turnbull Government showed this blind spot remains. They were open to the submarines being built in Japan. They sent the supply ships off to Spain.

Under this Government, Australia has lost manufacturing jobs on a scale we hadn’t seen before. Before this government, Australia made cars. Now we don’t. The industry simply doesn’t exist here any more. Ideology prevented the Government from intervening when it mattered, and as a result the Government faced a jobs crisis, particularly in Victoria and South Australia.

That’s when the government latched onto defence industry as a political solution. Government intervention could not be as easily criticised by conservative thinkers because government is the only client in the sector. Intervention could not be avoided. A defence industry push would give the government a way to claim action on manufacturing job losses.

Accordingly a commitment was made to build the submarines in South Australia. And post election the Industry Minister became the Defence Industry Minister, which gives us the clearest insight into the fact that defence industry now represents the totality of the Government’s broader industry policy.

The Coalition’s conversion on the road to Damascus about defence industry is shallow and expedient, but we will take it. It is hard to know how long-lived this commitment to Australian industry will be, but at least for now they have belatedly arrived at place that Labor has occupied for generations.

Combined with both parties’ election commitments to spending 2% of GDP on defence, defence industry policy is now bi-partisan, and that is good, because it should offer the opportunity to rise above partisan politics and give the ADF and the broader defence community a sense of long-term direction about defence industry policy.

For the first term of the Abbott-Turnbull government Australia’s defence industry was simply a card to be played in the Government’s pursuit of Free Trade Agreements. They put Korean construction of the Supply Ships on the table to try and close the Korean Free Trade Agreement. They used the same ploy with submarines and the Japanese.

While neither of these eventuated, these ideas were in play at points along the road, which belied any genuine and considered commitment on the part of the Coalition to use the opportunity of these acquisitions to help build an Australian defence industry, particularly in the maritime space.

In February 2015 the country was exposed to the full cynicism of the Government’s thinking on defence industry when Senator Sean Edwards of South Australia revealed his support for besieged Prime Minister Abbott had been assured by the Prime Minister committing to build the future submarines in Adelaide.

Whatever the ultimate merits of this decision, what became clear was that the single biggest procurement in the history of the Commonwealth and the lion’s share of Australia’s defence industry was being tossed around the Government party room as part of a power play in a leadership challenge.

These actions treated the Navy, Australian shipbuilders and the Australian public with a profound contempt. I welcome the Government’s decision to pursue Australian jobs with a local submarine build, but not for a second do I believe this is the result of deep thought. It’s politics, not policy, which drives this Government.

I’m not a prude when it comes to partisan politics. When real ideological differences exist between political parties, it is crucially important it gets argued out. The contest determines elections, and to be sure I really want to win the next one.

But if we are operating in a space where the difference is small and the political environment is not volatile, then we must all meet the challenge of rising above our political habits and reflexes and seek a different discussion. Such a discussion does not preclude us from holding the Government to account or pursuing areas of real difference, but it does offer a more thoughtful, deeper discussion which is in the interests of our defence community and our nation, and also provides certainty and policy stability.

In my opinion we desperately need a discussion like that in the field of defence industry, because it is not clear to me that a fully conceptualised rationale around Australia’s defence industry is currently being articulated. We all agree that as we acquire significant military equipment, the more of it we can build in Australia then the better for the Australian economy and jobs. Labor also knows there’s a strategic benefit in improving our sovereign capability.

But I believe we need to make a deeper argument if we are going to take developing a national defence industry beyond the realm of political rhetoric and make it a true national mission. Because right now it feels to me like we are half pregnant on our defence industry.

While our military leaders support the Australian defence industry, an honest assessment would suggest it is not their first priority. And let me be crystal clear—this is not a criticism. In the absence of a bigger, consistent argument at the political level their interest is rightly in acquiring the best equipment that will keep our soldiers, sailors and aviators safe while giving them ascendancy on the battlefield. Who could argue with that priority? And who could argue that with this as the priority, where equipment is built is a secondary issue.

Yet the problem is that developing an indigenous defence industry is a big endeavour. Without unanimous effort and buy-in from our political leadership, our senior military, our foreign service and our treasury totally committed to this as a national endeavour, I fear it won’t be sustainable, particularly under a future conservative government which is not reacting to the loss of the car industry.

We need a sustained national discussion to answer the fundamental question about why we want this industry as distinct from any other industry. This discussion needs to identify the realistic opportunity our current military acquisitions provide to leverage an indigenous defence industry for the future.

I believe the answer to this question lies in the way we answer the question about the need for a defence force in the first place. Of course we need a defence force to defend our home, but we also want one that will play a part in the way we project into the world.

The current naval shipbuilding program in Australia is a once in a lifetime opportunity to create an exporting Australian shipbuilding industry. We do some exporting now but if we get it right we can do more. Combined with some excellent niche technologies we’ve developed in Australia, there is an indigenous defence industry to be had.

But to do so we must reject petty partisanship. We must explore all the possible policy options available to us in a way that transcends the party politics of the day.

Submarines: German–Swedish tensions

At last week’s submarine conference, the following exchange took place between Dr Hans Christoph Atzpodien of TKMS and RADM (Rtd) Göran Larsbrink of Sweden, prompted by a question from the floor. Given the potential contribution of German and Swedish industry players to project SEA 1000, and given recent press interest, we thought it worth presenting the discussion in its entirety.

https://www.youtube.com/watch?v=1qHV3b8AcL0

Errors and omissions excepted

Kym Bergmann (Asia Pacific Defence Reporter):

…to Dr Atzpodien, we read in the European media that there’s a high level of unhappiness between TKMS and your Swedish subsidiary Kockums. Could you please comment on this for us?

Hans Christoph Atzpodien:

Just coming back to your question, actually as everybody knows we are the 100% owner of Kockums in Sweden, which in the meantime is renamed into TKMS AB. We have been invited to acquire it 15 years ago, and unfortunately now as Sweden has engaged in a national submarine program called A26 it seems that we are no longer wanted as a foreign owner— that is our perception. Of course we would have been open to any discussions and fair solutions to this new situation, but there was not much of talking—recently there was much more of, let’s say, force to deprive us of our basic ownership rights, and I can only hope that this will come to an amicable solution. Finally, at least I can say we are open for talks and have offered this various times, and I hope we will have a good solution for that in time because we feel first and foremost a responsibility also for the employees of the company. Read more

Naval navel gazing (part 2)

The Australian White Ensign (HMAS SUCCESS, against the Sunset in Qingdau, China)Naval navel gazing (part one here) is a complex endeavour with many participants: experts both civil and military mingle with ministers and manufacturers and even the odd puzzled taxpayer. Drawing on the previous column gazing back to Australia’s naval arguments in the early 1900s, this second effort will seek some rules that can stretch across a century of Oz saltdom to illuminate the debates of the early 2000s.

The simple expression of the rules takes heart and guidance from the jest that the Defence Secretary, Dennis Richardson, offered at the start of his recent ASPI speech: ‘One disclaimer, I am not a Defence theologian and the words I use should be understood in their plain English meaning’. So, consider the navel gazing rules with the first two commandments as paramount:

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Naval navel gazing

Australian battlecruiser HMAS Australia in 1914The state of Australia’s navy debate looks like this.

The experts war with each other over the best size of ships as close personal combat is mixed with the exchange of long range metaphors. The alliance, indeed the international system, is roiled and boiled by the rise of a new great power and peer competitor, making its arrival manifest through its naval buildup. The Australian government agonises over submarines

Then, suddenly, there is a great naval scare which ignites a newspaper campaign for everyone in Australia to contribute some cash so we can buy a new Dreadnought.

The Dreadnought delivers the punch line and gives the game away. These are the arguments that raged in the first decade of federation when Australia was groping its way towards the creation of its own navy. The summary from the early 1900s finds an to echo in quite a few of the broadsides that have been booming out in recent exchanges around here over maritime matters. Read more

Debating Australia’s Air Warfare Destroyers

ACIFIC OCEAN (July 13, 2012) The Arleigh Burke-class guided-missile destroyer USS Paul Hamilton (DDG 60) launches a Standard Missile (SM 2) during a missile exercise as part of Rim of the Pacific (RIMPAC) 2012.A lively debate has emerged on Australia’s $8 billion acquisition of three Hobart-class Air Warfare Destroyers (AWDs*). Some see the possibility that the new government in Canberra might add another AWD to this procurement order—though ASPI’s Mark Thomson has done an excellent job of setting out the counter arguments. Others have criticised AWDs as being both overly expensive and unnecessary in light of advanced anti-ship weaponry, with Hugh White being among the most vocal.

White even proposed scrapping larger destroyers in favour of smaller vessels armed with anti-ship weapons. He doesn’t specify the exact size of these vessels, which makes it difficult to directly argue against. But clearly, he’s talking about vessels with significantly less displacement than the 7000-tonne AWD or the larger frigates that are staple of both the British and Canadian naval fleets. He likely envisions a surface fleet composed of relatively small frigates, such as the 3,000-tonne Anzac ships—without the more formidable capabilities provided by either the AWD or even the remaining Adelaide-class guided missile frigates, which the AWD is designed to replace.

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