Category Archives: Capability Analysis

Analyzing Specific Naval and Maritime Platforms

No Strait for Aircraft Carriers

Earlier this year, United States Naval Academy Museum hosted a debate on the future of aircraft carriers (with parallel debate on twitter under #carrierdebate). It is a timely debate as the utility of aircraft carriers is under review in the face of the proliferation of Anti-Access/Area Denial (A2AD) systems. Critics argue that current aircraft carriers are too vulnerable in highly contested environments and too crucial to lose. Indeed, ever more precise, maneuverable, and swift anti-ship missiles (ASM) and silent submarines make certain types of environments overly prohibitive for aircraft carriers. However, this is not an entirely new situation. In fact, sending aircraft carriers close to coastlines and into the littorals has always been dangerous and against their designed purpose.

Ever since the commissioning of the ex-Varyag into the People’s Liberation Army Navy (PLAN) as the Liaoning (CV-16), speculations have taken place as to its tactical, operational, and strategic implications. With Taiwan classified as one of China’s “core interests”, and due to the protection (however ambiguous) offered by the US under the Taiwan Relations Act of 1979, Taiwan remains a prime hotspots with the potential to escalate into an all-out great power war. Thus, various analysts have engaged in discussions on the Liaoning’s role in a potential crisis over Taiwan. However, in doing so, it is better not to fall for the allure of focusing on the hardware capability over doctrine, tactics and the nature of the specific theater.

Harpoon anti-ship missile is launched from the Ticonderoga-class guided-missile cruiser USS Shiloh (CG 67) during a live-fire exercise. Image Credit: CC BY 2.0 Official U.S. Navy Page/Flickr.
Harpoon anti-ship missile is launched from the Ticonderoga-class guided-missile cruiser USS Shiloh (CG 67) during a live-fire exercise. Shilih is part of Japan-based Carrier Strike Group Five. Taiwan and Japan also posses Harpoon ASMs. Image Credit: CC BY 2.0 Official U.S. Navy Page/Flickr.

An examination of tactical and operational situations encountered by Carrier Strike Groups (CSG) through the Taiwan Strait reveals that adding a hypothetical Chinese carrier group’s presence does not augment existing the People’s Liberation Army Navy (PLAN)’s strategy. Instead PLAN doctrine relies on assets in the form of saturation missile attacks, submarines, fast missile boats and other Chinese A2AD elements. It is worth mentioning that these capabilities were already present in the the Taiwan Strait during the 1995-96 missile crisis. Being close to an enemy’s land-based assets poses a severe risk to the CSG’s survivability. Its combat effectiveness, is significantly diminished in the narrow waters of Taiwan Strait during high intensity combat conditions. In essence, the PLAN already had sufficient capabilities in place in 1996 such that sending a CSG into the Taiwan Strait would be a suicidal endeavor. The situation has only become more challenging for the US Navy in recent years not because the PLAN has acquired an aircraft carrier of its own, but rather due to the fact that China has greatly enhanced and modernized its existing A2AD capabilities.

The common reference to the 1996 deployment of aircraft carriers during the Taiwan Strait Missile Crisis as an indication of what could happen should the situation between China and Taiwan escalate into a shooting war suggests that there are two common misconceptions about the 1995-96 crisis. In late December’s piece for The Diplomat, Vasilis Trigkas presented interesting argument on the presence of aircraft carriers in the Taiwan Strait. In particular, he notes: 

Memories from 1996 – when Chinese missile tests in the strait prompted U.S. President Bill Clinton to order two fully armed carrier battle groups to pass through the Taiwan Strait – have shaped the strategic operational codes of the Chinese military and the Central Politburo. While China might have had the military resources to sink U.S. naval forces in its close periphery (quantity has a quality of its own) the strategic escalation that an attack against a U.S. carrier would trigger led Beijing to de-escalate. Since the importance of Taiwan’s reunification with the mainland remains an indispensible argument in the PRC’s rhetoric on the rejuvenation of the Chinese nation, China’s officials have long strategized about how to neutralize U.S. operational superiority in the event of a new strait crisis. The 2008 acquisition of an old Soviet aircraft carrier from Ukraine should be seen as an extension of this goal. This carrier is the missing piece in China’s strategic puzzle in its first island chain and adds new strategic variables to a Sino-U.S. clash over Taiwan.

First, contrary to popular belief, in March 1996 neither of the two deployed CSGs (Carrier Group Seven headed by CVN-68 Nimitz and Carrier Group Five centered around CV-62 Independence) entered Taiwan Strait (p. 110). Nimitz was deployed in the Philippine Sea ready to assist the Independence Battle Group deployed to the east of Taiwan. Indeed, earlier in December 1995 the Nimitz battle group did pass through the Taiwan Strait, but it was several months after Chinese first missile tests close to Taiwan in July 1995. Moreover, US officials back then believed that the passage went unnoticed by Beijing (p. 104).

Second, in 1995 and 1996, the issue at stake was Beijing displeasure with Taiwan’s effort to establish itself as a new democracy, demonstrated by then President Lee’s visit to Cornell University and the island’s first free presidential election in 1996. Beijing did not de-escalate because of the presence of the two CSGs but because it had made its point. However displeased the Chinese leadership was back then, no one has seriously contemplated further escalation. Moreover, China could very well have another motivation, testing the limits of US strategic ambiguity across the strait as they had tested the 1954 Taiwan-US defense alliance during the 1958 Taiwan Strait crisis. In that sense, deployment of two CSGs gave Beijing the indication that the US would indeed intervene should the Chinese Communist Party (CCP) decide to use deadly force against Taiwan.

Thus, the presence of the Nimitz and Independence CSGs in Taiwan’s proximity in 1996 should be understood as a symbolic gesture of the US commitment to the peaceful solution of cross-strait relations. It is doubtful that the acquisition of the Liaoning would deter Washington should it decide to demonstrate its resolve again. With the other assets that the PLA has been busy deploying in a meantime, now, that is all different story.

Trigkas argues that in 1996 the Chinese backed off because targeting US aircraft carriers would escalate the conflict out of proportion. Having an aircraft carrier and deploying it in advance of an intervening USN CSG would push the escalation ball to the US’ corner. Henceforth, it would be the US who would have to take the first shot because the Chinese CSG would block its way. Given that in 1996 the use of force was off the table and the crisis was all about making a political stance without intention to escalate, would a Chinese aircraft carrier prevent future US intervention by making itself too (politically) valuable to be attacked?

Not since World War II has the world seen any significant battle fought between rival carrier groups, and just as the carrier replaced the battleship through asymmetric means (the range of the onboard aircraft negated the firepower, speed and armor of a conventional battleship.), the effective counter to a CSG is unlikely another CSG, but instead a whole range of asymmetrical means such as strikes against its rear-echelon fast combat support ships (AOEs), land-based airpower or submarine warfare. Moreover, one need not send the aircraft carrier to the bottom, resulting in massive loss of lives of those on board, to neutralize the combat effectiveness of a CSG.

Tuo Jiang class missile corvette deployed by Taiwan could become major threat for PLAN's aircraft carriers. Image Credit: CC BY-SA 4.0 Larry41028/Wikimedia Commons.
Tuo Jiang class missile corvette deployed by Taiwan could become major threat for PLAN’s aircraft carriers. Image Credit: CC BY-SA 4.0 Larry41028/Wikimedia Commons.

Even if Chinese aircraft carriers were to become targets of the USN’s CSG, it would still be an unequal encounter for the PLAN, facing much more experienced USN CSGs with superior sortie rate and integrated defense. In such an encounter, the US Navy could inflict sufficient damage to incapacitate a Chinese aircraft carrier without actually sinking it. The best way to render an aircraft carrier useless is to limit the effectiveness of its air wing. Liaoning’s air wing is in this respect very modest totaling 30 J-15s fighter jets with compromised range, endurance and armament resulting from a lack of catapult launch systems. This number will most likely be higher for Liaoning’s successors, but the sortie generation rate accumulated through operational experience will take a lot longer to equalize. In comparison, Nimitz and Ford-class supercarriers typically carry 70-80 fixed wing aircraft and helicopters and their designs are much more flexible to accommodate various mission requirements.

Furthermore, the employment of a CSG in an open confrontation would run contrary to the tactics and culture consistently displayed by a sea-denial mindset influenced by the tradition of people’s war that informs so much of the CCP’s naval strategy (p. 37), prominently displayed during the Battle of Dongshan on 6 Aug 1965, where 11 PLAN torpedo boats and 4 patrol boats sunk 2 Taiwanese capital ships in 3 consecutive waves, resulting in 171 missing and 31 deaths, including the commander of the ROCN Second Fleet. The PLAN’s efforts towards becoming a Blue-Water Navy have undoubtedly changed its tactical mindset, but even then deployment of a Chinese aircraft carrier against Taiwan (and presumably against the USN) does not offer advantages that would outweigh the potential costs. If deployed outside of the A2AD protective cover, a Chinese CSG would be too weak to counter its US counterpart, and when deployed within A2AD cover, its capabilities are largely redundant.

Moreover, while the debate focuses on the political significance of sinking a US aircraft carrier, Beijing itself could ill-afford the political consequences of its CSG rendered impotent during combat in or close to the Taiwan Strait where potential adversaries such as Taiwan’s recently introduced Tuo Jiang class missile corvette could fully exploit its weaknesses. Indeed, should China deploy its CSG near Taiwan as a part of combat operations, USN would not need to fire a single shot and China’s capital ship could still end-up incapacitated or sunk. Taiwan’s sea and land-based anti-ship missiles represent a reverse A2AD significant challenge for China. 

Hence it is reasonable to conclude that the Chinese acquisition of the Liaoning and the further expansion of the Chinese aircraft carrier fleet, while significant, has very little direct impact on a potential crisis deployment in the Taiwan Strait. Instead one should look toward the prestige factor of presenting itself as a Blue Water Navy and a CSG’s value in prosecuting the territorial ambitions displayed by the Chinese government in recent times, e.g. in the South China Sea or the Diaoyutai/Senkaku Islands, where Chinese land-based airpower does not enjoy the same advantage as in the case of Taiwan-related contingency.

In a potential crisis across the Taiwan Strait, the PLAN’s goal would be better served through a deterrence formed by a combination of guided missiles destroyer-led surface action groups, land-based airpower utilizing supersonic ASMs coupled with over the horizon (OTH) targeting, and high-end attack submarines rivaling the low noise level of even US Seawolf-class SSNs. All of this could successfully prevent US reinforcements from accessing littoral regions of the theater (A2) and impede their movement along the First Island Chain (AD).

The aircraft carrier USS George Washington (CVN 73), center-right, leads the George Washington Carrier Strike Group and Japan Maritime Self-Defense Force ships in tactical maneuver training during Annual Exercise (AnnualEx) 13. Image Credit: CC BY 2.0 Official U.S. Navy Page/Flickr.
The aircraft carrier USS George Washington (CVN 73), center-right, leads the George Washington Carrier Strike Group and Japan Maritime Self-Defense Force ships in tactical maneuver training during Annual Exercise (AnnualEx) 13. Image Credit: CC BY 2.0 Official U.S. Navy Page/Flickr.

Aircraft carriers will maintain its role as a blue water force projector in the foreseeable future. Indeed, they are indispensable for a global sea-control navy tasked with missions to protect sea lines of communication. But the carrier battle groups were never meant to physically present itself in an environment similar to the Taiwan Strait. Granted, ASMs and submarines are problem on the open seas too but any potential opponents would be limited by the storage capacity of their onboard ordnance, with PLAN having limited ability of underway replenishment. In other words, open sea offers no advantage of a compressed engagement battlespace that littoral contestant such as China possesses against the limited range of present day CSG, bearing in mind that as China’s A2AD capabilities make it difficult for US Navy CSGs, PLAN’s own aircraft carrier faces the very same risk from the its neighbors, Taiwan included. 

Michal Thim is a Ph.D. candidate in the Taiwan Studies Program at the China Policy Institute (CPI), University of Nottingham, a member of The Center for International Maritime Security, an Asia-Pacific Desk Contributing Analyst for Wikistrat and a Research Fellow at the Prague-based think-tank Association for International Affairs. Michal tweets @michalthim.

Liao Yen-Fan is Taipei-based defense analyst specializing in airpower and Taiwanese military. He can be reached for comment at [email protected].

The Potential for Panshih: Taiwan’s Expanding Maritime Role

Taiwan has long enjoyed a robust maritime force, intended to defend the island nation from threats both real and perceived across the Taiwan Strait. An arrangement under which the United States will deliver four Oliver Hazard Perry-class frigates for use by the Republic of China Navy (ROCN) will only serve to further enhance the country’s maritime power. But perhaps the most interesting development for maritime affairs in the Asia-Pacific region so far in 2015 is the delivery of the ROCS Panshih.

With a total displacement of 20,000 tons and a range of almost 15,000 kilometers, the supply ship Panshih will greatly contribute to the ROCN’s expeditionary capabilities, allowing Taiwan to contribute meaningfully to disaster relief or humanitarian operations anywhere in the region. Historically, Taiwan has lacked this capability, fielding only the ROCS Yuen Feng, a troop transport. Although the ROCN has operated another supply ship for some years, ROCS Wu Yi, the Panshih is significantly larger and possesses much more advanced medical facilities. Reportedly, the Panshih is also only the first of its class – a second ship of an identical design is expected for the ROCN in the next few years.

These ships may soon cruise the seas in a Taiwanese effort to replicate the successes of China’s maritime diplomacy. The Peace Ark, a hospital ship in service with the People’s Liberation Army Navy (PLAN), has toured extensively since its commissioning in 2008. For example, the Peace Ark was deployed to assist the Philippines in recovering from Typhoon Haiyan in November 2013, and later was an important component of the Chinese participation in the Rim of the Pacific Exercise (RIMPAC) 2014. Port visits and participation in such multilateral operations enhance China’s “soft power”, whereas observers note that Taiwan has been sidelined for the most part in regional diplomatic affairs. Pursuing a similar theme to China’s charm offensive could be just the remedy to Taiwan’s isolation.

A port of the flight deck on the Panshih.

Yet there is one catch to the Panshih’s particular design. The vessel boasts some offensive capabilities, including a Phalanx close-in weapons system, a 20mm Gatling gun, short-range Sea Chaparral surface-to-air missiles, several .50 calibre machine guns, and 30mm turrets. In contrast, the Berlin-class auxiliary ships employed by the Germany Navy, and which the Royal Canadian Navy will also soon employ as the Queenston-class, have only four MLG 27mm autocannons for defence. China’s Peace Ark is entirely unarmed. While the Panshih’s armaments grant it operational flexibility, they also undermine the vessel’s capacity to act as a soft power tool.

Perhaps the most ideal role for this vessel in the future will be to join relief operations in unstable environments. Taiwan has not contributed much in this area in previous years, with the ROCN focusing almost entirely on defending the Taiwanese coastline from threats across the strait. But there is one success story: in 2011, Taiwan initiated some participation in the European Union’s Operation Atalanta. This constituted an important contribution to international efforts against piracy in the Gulf of Aden and the Indian Ocean. But this is the lone case of active engagement by the ROCN in any initiative beyond the Taiwan Strait. The Panshih could grant Taiwan more options in this regard, since the deployment of fully fledged combat vessels to an area like the Gulf of Aden could be viewed by domestic audiences as weakening Taiwan’s coastal defenses or otherwise as a misuse of Taiwanese defense resources. A supply ship could be more readily spared so far as the public is concerned.

Lending credence to the idea that the Panshih will be used to support humanitarian operations in failed or failing states, the vessel also has impressive hangar space, capable of storing up to three helicopters. The Taiwanese media has focused on the capacity for the ship to serve as a takeoff and landing platform for anti-submarine helicopters, but it is also certainly possible for the ship to serve as a base for transport helicopters ferrying supplies and specialized personnel to inland locations, while also bringing back patients requiring intensive care at the Panshih’s onboard medical facilities. The ROCN’s 19 Sikorsky S-70C(M) Thunderhawk helicopters offer some possibilities in this regard.

In any case, the ROCN now has in its possession a versatile ship. What remains to be seen are how the ROCN will put it to use in the coming years and to what extent this will reflect Taiwanese foreign policy priorities. With such a sophisticated vessel, it would be a shame for Taiwan to keep it docked as backup for a regional conflict that might never, and hopefully will never, come.

Paul Pryce is a Research Analyst at the Atlantic Council of Canada. His research interests are diverse and include maritime security, NATO affairs, and African regional integration.

This article can be found in its original form at offiziere.ch and was republished by permission.

F-35 Fanboy Makes His Case

By Dave Schroeder

Fair warning: what follows is commentary about the F-35. However, this isn’t going to be a very popular commentary, as it doesn’t follow suit with the endless stream of recent articles, opinions, and blog posts making the F-35 out to be the worst debacle in the history of the militaries of the world. On top of those you’d expect, even automotive and IT blogs have piled on.

People who have no idea how government acquisition works, nor the purpose of the Joint Strike Fighter program — or even some who do, among many with ideological axes to grind — relish trashing the F-35, always managing to include “trillion dollar” (or more) somewhere in the title of the latest article to lambast the plane.

The F-35 is a multirole fighter that is designed to replace nearly every fighter in not just the Air Force inventory, but the Navy and Marine Corps as well: the F-16, F/A-18, AV-8B, and A-10, and to augment and partially replace the F-15 and F-22. The F-35 lifetime cost will be less than that of all the diverse platforms it is replacing — and their own eventually needed replacements.

China devoted significant national espionage resources to stealing everything they could about the F-35, and implementing much of what they stole in the J-31/F-60 and J-20, China’s own next-generation multipurpose stealth fighters. This theft added years of delays and hundreds of millions of additional redesign dollars to F-35 development.

[youtube http://www.youtube.com/watch?v=CSZr58hH_cI]
Navy test pilot LT Chris Tabert takes off in F-35C test aircraft CF-3 in the first launch of the carrier variant of the Joint Strike Fighter from the Navy’s new electromagnetic aircraft launch system, set to install on USS Gerald R. Ford (CVN-78).

If anything, the F-35 suffers from being a “jack of all trades, master of none” — which is itself a bit of an overstatement — but we also can’t afford the alternative of follow-on replacement for all existing platforms. And for all the delays, we still have aircraft in the inventory to serve our needs for the next 10-20 years. Articles oversimplifying sensor deficiencies in the first generation, software issues with its 25mm cannon (the gun remains on schedule), or the oft-quoted 2008 RAND report, apparently choose overlook the reality that it’s not going to be instantaneously better in every respect than every aircraft it is replacing, and may never replace aircraft like the A-10 for close air support.

The F-35 development process is no more disorganized than any other USG activity, and if you want to look for people protecting special interests, it’s not with the F-35 — ironically, it’s with those protecting all of the myriad legacy platforms, and all of the countless different contractors and interests involved with not just the aircraft, but all of the subsystems made by even more contractors, all of whom want to protect their interests, and which are served quite well by a non-stop stream of articles and slickly-produced videos slamming the F-35.

NASA’s James Webb Space Telescope was originally to cost $500 million, and is now expected to cost $8.8 billion and will be over a decade late. Shall we cancel it? Or take the pragmatic approach when the purpose of the mission is important and no reasonable alternatives exist? This isn’t a problem with just DOD acquisition. It’s the reality in which we live.

A F-35B hovers during testing.
A F-35B hovers during testing.

One of the reasons the JSF program, and the F-35, came into being is precisely because we won’t be able to afford maintaining and creating replacements for a half-dozen or more disparate aircraft tailor-made for specific services and missions.

The F-35 itself is actually three different aircraft built around the same basic airframe, engine, and systems. The F-35A is the Air Force air attack variant, the F-35B is the VSTOL Marine Corps variant, and the F-35C is the Navy carrier-based variant. If we had already retired every plane the F-35 is supposed to be replacing, there might be cause for concern. But as it stands, we have retired none, and won’t until the F-35 can begin to act in their stead.

The A-10, for instance, has found new life over the last 12 years in close air support roles, primarily in Iraq and Afghanistan, and is often held out as an either/or proposition against the F-35. No one ever claimed that the F-35 was a drop-in replacement for an aircraft like the A-10, and no one could have predicted the success the A-10 would again find in environments not envisioned when the JSF program came into being — though some of this success is overstated, claims otherwise notwithstanding. The Air Force is faced with difficult resource prioritization choices; if the A-10 is that critical, keep it. The debate on the future of CAS isn’t dead.

U.S. Air Force Capt. Brad Matherne, a pilot with the 422nd Test and Evaluation Squadron, conducts preflight checks inside an F-35A Lightning II aircraft before its first operational training mission April 4, 2013, at Nellis AFB, NV.
U.S. Air Force Capt. Brad Matherne, a pilot with the 422nd Test and Evaluation Squadron, conducts preflight checks inside an F-35A Lightning II aircraft before its first operational training mission April 4, 2013, at Nellis AFB, NV.

If there are questions as to why we even need a fifth-generation manned multirole fighter with the rise of unmanned systems, cyber, and so on, the answer is an easy one: China and Russia both developed fifth-generation fighters, and the purpose of these aircraft isn’t only in a direct war between the US and either of those nations, but for US or allied military activity in a fight with any other nation using Chinese or Russian military equipment, or being protected by China or Russia. You don’t bring a knife to a gun fight.

The F-35 isn’t just a US platform: it will also be used by the UK, Canada, Australia, Italy, the Netherlands, Denmark, Norway, Israel, Turkey, Singapore, and perhaps other nations. And the fact is, this is not only our fifth-generation manned fighter, it is likely the last. We cannot afford to have separate systems replace all or even most of the platforms the F-35 is replacing, nor can we simply decide to forgo replacements and extend the life of existing platforms by decades.

The F-35 is our nation’s next generation fighter, and it’s here to stay.

[youtube http://www.youtube.com/watch?v=Ki86x1WKPmE]
F-35B ship suitability testing in 2011 aboard USS Wasp (LHD-1)

Dave Schroeder serves as an Information Warfare Officer in the US Navy, and as a tech geek at the University of Wisconsin—Madison. He holds a master’s degree in Information Warfare, and is a graduate of the Naval Postgraduate School (NPS). He also manages the Navy IDC Self Synchronization effort. When not defending the F-35, he enjoys arguing on the internet. Follow @daveschroeder and @IDCsync.

Peeling Back the Layers: A New Concept for Air Defense

By Bryan Clark

The newest concept being forwarded by U.S. Navy surface fleet leaders is “distributed lethality”, in which almost every combatant and noncombatant surface ship would wield offensive missiles such as the Naval Strike Missile (NSM) or Long Range Anti-ship Missile (LRASM). The concept’s central idea is that deploying a large number of U.S. ships able to threaten enemy ships, aircraft, or shore facilities will create a potentially unmanageable targeting problem for potential adversaries. This, it is argued, could deter opponents from pursuing aggression and in conflict could compel adversaries to increase their defensive efforts, constrain their maneuver, and spend valuable time finding and defeating U.S. forces in detail.

Implementing this concept should start with the Navy’s surface combatants, rather than its numerous unarmed non-combatant ships. Arming the Navy’s more than 60 logistics and support ships with offensive missiles and providing them the command and control systems to coordinate their fires will be costly. And once equipped, these noncombatant ships will become more attractive targets while not being better able to protect themselves unless further investments are made in defensive systems. In the end, offensive operations could distract noncombatant ships from their primary missions and reduce the endurance of combatants that depend on them for fuel and to conduct less stressing missions such as training and counter-piracy.

Given the challenges in using supply and support ships for offensive missions, the first step to implement distributed lethality should be to ensure all the Navy’s surface warships are able to conduct offensive operations. These consist of amphibious ships and surface combatants.

The fleet’s approximately 30 amphibious ships conduct offensive operations using their main battery of embarked Marines, which could be complemented with offensive missiles. The best way to do this would be with vertical launch system (VLS) magazines. While amphibious ships have more defensive systems than non-combatant ships, they still may not be sufficient for some environments. Since a VLS can host a wide range of missiles, it would enable an amphibious ship to increase either its offensive or defensive weapons capacity based on the intended mission and threat environment.

The most important element of the fleet for distributed lethality, however, will be the Navy’s 140 surface combatants (88 large surface combatants and 52 small surface combatants, based on the Navy’s force structure requirement). These ships already have some defensive and command and control capabilities to protect themselves and coordinate offensive operations. But they all lack offensive capacity because of their configuration (in the case of small combatants) or air defense concept (in the case of large surface combatants)

Restoring surface combatant lethality

Small surface combatants such as minesweepers, patrol craft, and Littoral Combat Ships (LCS) have only a few short-range offensive weapons. The stated intent of surface fleet leaders is to augment these on LCS with long-range surface-to-surface missile launchers, but the launcher being considered is specific to a weapon such as NSM, rather than a more versatile VLS array. As with amphibious ships, LCS may need to increase its defensive capacity if it is pursuing more offensive operations. A VLS magazine would enable LCS to load more defensive missiles along with offensive weapons, with the additional benefit of being able to protect a nearby ship from air threats as an escort–a capability it lacks today.

Large surface combatants such as cruisers (CG) and destroyers (DDG) have VLS magazines, but are unable to make room in them for more offensive missiles because of the surface fleet’s current air defense approach. This approach is designed to engage enemy aircraft and missiles in multiple layers starting from long range (from 50 nm to more than 100 miles) through medium range (about 10–30 miles) to short range (less than about 5 miles). Each layer is serviced by a different set of interceptors, with those for the long-range layer (e.g., SM-2 and SM-6) being the largest and most preferentially used. Electronic warfare jammers and decoys are also used from medium to short range, but only after interceptors have been unsuccessfully expended against incoming missiles.

This layered air defense scheme puts surface combatants on the wrong end of weapon and cost exchanges. Using today’s standard shot doctrine of “shoot, shoot, look, shoot” (SS-L-S) the complete 96-cell VLS capacity of a DDG (if all devoted to air defense) would be consumed against fewer than fifty ASCMs—missiles that would cost the enemy about two percent the price of a DDG.

Better long-range interceptors will not improve the weapon exchange and only exacerbate the Navy’s cost disadvantage. The SM-6 interceptor that entered service last year is faster, longer range, more maneuverable, and has a better seeker than the Cold War-era SM-2 but costs about $4 million compared to $680,000 for an SM-2. Meanwhile a typical advanced ASCM costs about $2-3 million. Given a SS-L-S firing doctrine, each defensive engagement using SM-6s will cost two to four times that of the ASCM it is intended to defeat.

A new air defense approach

The size of VLS magazines cannot be changed; therefore making VLS cells available for offensive weapons will require either using fewer air defense interceptors or getting more interceptors into each VLS cell. The Navy could use fewer air defense interceptors by changing its shot doctrine to S-L-S. The SM-6 shows improvements in interceptor lethality are possible and could eventually make a S-L-S doctrine viable. But a S-L-S doctrine will still require initial engagements to occur far enough away to allow a second engagement before the incoming ASCM hits the ship. This will require large, long-range interceptors such as SM-6 that take up a whole VLS cell and over-the-horizon (OTH) targeting from another ship or an aircraft. In the end a shift to S-L-S would only double air defense capacity at best and may not free up many VLS cells for offensive missiles.

Alternatively, the Navy could fit more interceptors into fewer VLS cells by shifting to a shorter-range air defense scheme. Shorter-range weapons such as the Evolved Sea Sparrow (ESSM) Block 2 that will debut in 2020 are smaller than longer-range interceptors and can exploit the same lethality improvements as SM-6 to achieve a high probability of defeating incoming ASCMs. The ESSM fits four to a VLS cell–quadrupling air defense capacity–while it’s range will be about 10-30 miles. It would thus engage incoming ASCMs at about the same range as electronic warfare (EW) jamming, deception, and decoy systems (depending on the ASCM’s altitude). This will make it possible for EW to reduce the number of interceptors expended, compared to today’s scheme in which EW is only used after interceptors have failed.

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New defensive AAW scheme. Click to expand. (Graphic via CSBA)

A 10-30 mile air defense scheme will also prepare the surface fleet to integrate new weapons such as lasers and electromagnetic railguns (EMRG) that will likely be mature in the early to mid-2020s. While these weapons cannot fully replace interceptors, they could enable the Navy to shift additional VLS capacity to offensive missiles. The shipboard lasers expected in this timeframe would be effective against ASCMs out to a range of about 10 miles while an EMRG will be able to engage incoming ASCMs out to about 30 miles. At longer ranges, the unpowered EMRG projectile will take too long to reach an incoming ASCM, which could maneuver and cause the EMRG to miss.

The resulting air defense scheme would consist of lasers, EMRGs, interceptors (e.g., ESSM), and EW systems engaging incoming missiles in a dense layer 10–30 miles away from the ship. This is far enough away for a surface combatant to protect another ship while each ship’s self-defense systems would engage “leakers” at 2–5 miles. Automated decision aids that match air defense systems to incoming missiles will be an essential element of this scheme since multiple systems will be engaging incoming missiles at the same approximate range. These aids are inherent to the Aegis combat system, but would have to be upgraded to incorporate new weapons such as lasers and EMRGs

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Evolved VLS loadout with proposed weapons changes. (Graphic via CSBA)

Offensive anti-air warfare (AAW) is the other side of this new air defense approach. While air defense shifts to 10-30 miles using weapons such as ESSM and lasers, longer-range interceptors such as SM-2 and SM-6 would focus on shooting down enemy aircraft before they can launch ASCM attacks. SM-6s, in particular, can engage enemy aircraft outside their ASCM range and are much less expensive than the aircraft they will destroy, producing a more advantageous cost exchange than using SM-6 against enemy ASCMs. Further, enemy aircraft generally fly at higher altitudes than ASCMs, enabling them to be detected farther away by shipboard radars whose visibility is limited by the horizon.

If the surface fleet is to implement distributed lethality, the place to start is with surface combatants. Today they lack the offensive capacity to pose a significant threat to enemy navies. Obtaining that capacity from the surface fleet’s main battery, the VLS magazine, will require that the Navy revisit fundamental aspects of how it fights. The alternative will be to continue devoting increasing portions of its weapons capacity to defense, and concepts such as distributed lethality will only exist in the pages of professional journals.

Bryan Clark is a Senior Fellow at the Center for Strategic and Budgetary Assessments. This post is adapted from his recent report “Commanding the Seas: A Plan to Reinvigorate U.S. Navy Surface Warfare.”