Category Archives: Tactical Concepts

What are the evolving ideals of tactics in maritime and naval affairs.

Laser Weapons and Naval Warfare: An Introduction

By Paul Bragulla

To date, the story of laser weapons has been one of great promise but slow delivery. However, modern developments in the fields of materials science, optics, and computer technology are making it increasingly likely that they will reach operational status in the next decade. This realization has prompted laser weapon-development programs around the world, including Germany and China.

Progress in the development of solid state lasers (SSLs) has been especially rapid. In January 2013, Rheinmetall – a German corporation – demonstrated a 50 kW prototype capable of anti-drone and counter-rocket, artillery, and mortar (C-RAM) functions. Rheinmetall also has plans for a technology demonstrator in the 60 kW range next year and has indicated they believe there are no major technical barriers to the construction of a 100 kW device1. According to a Congressional Research Service report, 100 kW is the beginning power range at which a laser becomes an effective C-RAM battery, or can defeat subsonic anti-ship cruise missiles (ASCMs) and manned aircraft2.

Due to the great power, cooling, and volume capacity of surface warships it has been suggested that, of all the services, the U.S. Navy is the ideal “first adopter” of high-energy laser weapons in the 100+ kW range3. This implies that early laser weapons of other nations may also see their first operational use on warships. Additionally, fitting lasers to warships may counteract the offensive-defensive imbalance that has developed in the last 50 years whereby the cost of anti-ship weapons has declined while the cost of their respective countermeasures has remained high. A laser pulse capable of disabling an ASCM may cost a few dollars in comparison to the $800,000 price of a Rolling Airframe Missile (RAM). Laser weapons are also touted as simplifying logistical requirements and allowing longer time on station, as they do not require ammunition reloads.4

There has been abundant analysis of the technical characteristics of various potential laser weapon systems and their possible effects on various targets, although much more must be done before these systems can take their place alongside proven technologies. Here, however, I would like to focus on the larger-scale impact laser weapons may exert on the development of naval warfare in the 21st century. How will they affect the balance of measure and countermeasure? How might state and non-state actors respond to the development of weapons which render unfavorable the currently favorable (to them) cost-benefit ratio of their anti-ship weapons to our defenses?

I must make many assumptions, but I will do my best to ensure that these are both explicit and reasonable. My first general assumption is that within the next decade, SSLs with beam powers of up to 500 kW will be developed5. Such lasers would be able to engage UAVs, subsonic ASCMs, artillery rockets and shells, and manned aircraft. It has been estimated that the Flight III Arleigh Burke-class guided missile destroyers (DDGs) will have the excess power and cooling capacity to support up to a 200 kW SSL , which would be capable of all of the above with the exception of engaging manned aircraft.

Lasers as counter-measure
                   Lasers as counter-measure

The possibility exists of outfitting other ship classes, such as the Gerald R. Ford-class aircraft carriers and Zumwalt-class DDGs, with greater power-requirement weapons and the Navy has expressed an interest in equipping them with free-electron lasers (FELs). I assume that FELs with up to 1 MW of beam power will prove practicable within 20 years. Compared to SSLs, installing these brings far larger weight as well as radiation shielding considerations and so are likely to be fitted to specialized laser-ships, possibly select Zumwalts built with the air/missile defense role in mind. Alternatively, SSL technology may advance in ways that make multiple SSLs firing together more economical than fewer, larger FELs.

What follows from these assumptions? First, it is very unlikely that laser weapons will largely replace missiles or guns in the world’s naval arsenal. Instead they will add more arrows, with unique advantages and limitations, to the naval commander’s quiver. There are some things, like C-RAM and anti-UAV, which are within the capabilities of even the relatively lower power lasers that can be mounted on the Flight III Arleigh Burkes. The advantages of such a laser-based Close-In Weapon System (CIWS) are magnified by the fact that an opportunistic attack by means of rockets, artillery, or mortars against an American ship in a foreign port or naval choke point – whether by state or non-state actor – is a far likelier near-term danger than an attack on the high-seas by supersonic ASCMs. Compared to an expensive interceptor missile or collateral-damage-causing gun-based CIWS, the superiority of using a few dollars’ worth of electrical power to destroy an incoming threat is apparent. Such a system adds another layer to warship armaments, freeing missiles and guns to concentrate on targets more suited to their particular capabilities.

However, to fully appreciate the implications of this technology we must build a conceptual framework that integrates lasers with extant weapons systems. The two primary types of weapons systems currently available to the world’s navies are guns and missiles. The distinguishing features of gun-type weapons systems are that they employ an unguided projectile which lacks an on-board propulsion system, while those of missile-based systems are that they use a guided projectile which is propelled to the target by an on-board propulsion system. Like all weapons, both seek to disrupt the functions of a target by depositing energy within it.

The traditional weapon spectrum
The traditional weapon spectrum

If we consider these two types further we see that they can be viewed as points along a spectrum, upon which there are many possibilities. For instance, rocket-assisted artillery shells and guided artillery shells have characteristics of both guns and missiles; they mix the advantages and limitations of the two extremes.

The advent of lasers and other Directed-Energy Weapons (DEW) adds a third vertex to our diagram, and expands the spectrum of possibilities into a two-dimensional field.

The new playing field
The new playing field

Lasers excel at destroying lightly-armored targets which move or maneuver rapidly within line of sight (LOS) of the weapon. Thus, they complement rather than replace the other two approaches. Missiles and guns are better used to engage non-LOS targets, which may be slower moving and more heavily protected, or under meteorological conditions unfavorable to lasers.

Another use of this diagram is to explore the possibilities for new weapons systems that may or may not currently exist. Weapons along the gun-missile edge have been identified, but what of the other two? Are there possible weapons which combine aspects of all three vertices, and so fall in the space between the edges? Boeing’s new Counter-electronics High-powered Microwave Advanced Missile (CHAMP)6 is a cruise missile that carries a microwave DEW capable of disabling electronics near its flight path, and so would seem to occupy a spot along the Missile-DEW edge. This space is also shared by various “bomb-pumped” DEW concepts that use the energy of a nuclear initiation to excite an X-ray lasing medium, as in Project Excalibur, or generate a plasma jet like the “casaba howitzer” developed through Project Orion.

The introduction of powerful laser weapons will likely cause a tumult in weapons development as both the particular abilities of various laser configurations are tested and countermeasures developed. In addition to armoring conventional missile designs, is there the possibility of developing a new type of gun-missile hybrid to exploit the particular weaknesses of laser weapons? An ASCM variant which, from beyond LOS, launches one or more solid depleted uranium or tungsten penetrator darts at high-supersonic velocity towards a target ship might fit this role. Such a penetrator would be more difficult for a laser to deflect or destroy than any missile, though a conventional interceptor might find it less challenging.

In following segments, I will explore more aspects of the possible development of laser weapons and their countermeasures. What scenarios emerge from a future in which high-energy FELs advance faster, or slower, than expected? What strategies, technological and otherwise, might various potential opponents of the U.S. Navy take to counter such weapons? What does a scenario in which MW-range laser weapons and railguns advance rapidly mean for the future of missiles and aero-naval warfare as a whole? We cannot know what is to come until we experience it, but with careful forethought we may prepare the conceptual foundation for rapid and effective responses to future challenges.

Paul W. Bragulla is the recent cofounder of Prokalkeo, an emerging technology consulting company headquartered in the Washington, D.C. area. He holds a BS in Physics from Rensselaer Polytechnic Institute and is an enthusiastic scholar of military affairs. His scientific experience is primarily in the fields of high-energy lasers and aerospace technology.

1. Peter Murray, German Military Laser Destroys Targets Over 1Km Away.
2. Ronald O’Rourke collects the results of several studies on laser effectiveness into a single table in Navy Shipboard Lasers for Surface, Air, and Missile Defense: Background and Issues for Congress (Congressional Research Service, 2013), table A-1, 36.
3. Mark Gunziger and Chris Dougherty specifically suggest high energy SSLs as the technology of interest in their Changing the Game: The Promise of Directed Energy Weapons (Center for Strategic and Budgetary Assessments, 2012), but point out that the Navy is also strongly focused on Free-Electron Lasers (FELs) which promise multi-megawatt outputs suitable for the Anti-Ballistic Missile (ABM) role as well as the ability to tailor the frequency of their output to local meteorological conditions.
4. The notable exceptions to this rule are chemical lasers, which utilize the energy of a chemical reaction to generate their beams. They are also the only lasers currently capable of producing megawatt-range outputs.
5. Changing the Game: The Promise of Directed Energy Weapons, 25.
6. Randy Jackson, CHAMP – Lights Out.

Featured Image: Laser weapon prototype (U.S. Navy)

Who Defeated the Somali Pirates? Another Look

 

Heading home after another long day at work.
                                         Heading home after a long day at the office.

As observers thankfully have noted, piracy off the coast of Somalia dropped significantly over 2012.  As Mark Munson points out, a variety of factors contributed to this decline.  These included an increase in armed guards aboard commercial vessels, continued international naval patrols in the region, attacks by some of those international naval forces on pirate havens, and operations by the Puntland Maritime Police Force (PMPF).  

Yet it would be too easy to write off piracy in the area as a dead issue.  Despite some glaring examples to the contrary, pirates are not uniformly stupid, as demonstrated by the $160 million they made in ransom in a single year.  They are capable of adapting to change in their maritime operating environment.  For example, when the world’s navies began patrolling the area, pirates attempted to disguise themselves as innocent fishermen.  International naval forces reacted by conducting more thorough searches and seizures of suspected pirates, who in turn adapted by using motherships to expand their area of operations beyond the patrol areas.  Despite increasing the transaction costs for both the pirates and international naval forces involved in this conflict, this “tit-for-tat” process did not slow or halt the increase in piracy.

Several analysts believe that the increase in armed private security guards aboard commercial ships in the region played a key role in reducing piracy; at least 40% of commercial vessels in the region had armed guards aboard at the beginning of 2012.  Although armed guards did in fact contribute to the drop in piracy, their dampening effect merely shifted the onus back to the pirates to continue measure/counter-measure evolution.  There’s little to stop them from adapting to this tactical change as they adapted to those that came before, for instance by using more personnel to overwhelm ship defenses, or mounting a stabilized light machine gun to deliver greater and more accurate fire against ships.  Rather, it’s two other factors that have been the main cause of the drop in piracy in Somalia:  attacks on pirate safe havens from the offshore EU task force and more operations by a better trained PMPF. 

 Piracy Mar 2011

In May 2012, EU forces attacked the pirate safe haven Haradhere, one of the largest pirate bases in one of Somalia’s notoriously ungovernable regions.  This was the start of the EU’s counter-piracy targeting pirate safe havens with surgical and extremely precise strikes.  It was also a key development in the region as the first strike ashore by any patrolling international naval forces (with the exception of a handful of hostage rescue missions).  By targeting the pirates at their center of gravity, EU forces were able to damage their logistics and raise the cost of doing business, which in turn disrupted their operations. 

However, these strikes have two main shortfalls.  First, they are difficult to conduct at a high tempo because of the time it takes to locate the strongholds, plan the strikes, and carry them out while ensuring minimum collateral damage; being based afloat only lengthens the timeline.  Second, the surgical requirements for the strikes allow pirates to react by surrounding themselves with even more civilians, making the strikes all the more difficult.    

Unlike the EU’s strikes, the PMPF attacks pirate strongholds from land.  Trained initially by Saracen International/Sterling Corporate Services (which was led by Australian Lafras Luitingh, an experienced intelligence officer with from South Africa), the PMPF are arguably one of the most well-trained paramilitary forces north of Mogadishu.  Although they are still categorized as a backwater paramilitary force, Sterling Corporate Services created this simple force that outclasses its pirate adversaries (however due to behind-the-scenes political moves it is unclear who, if anyone, now trains them).  Consequentially, the PMPF has been able to patrol the littorals in Puntland and attack pirate bases.  Although the PMPF lacks the firepower of the EU task force, they are able to permanently station themselves in areas prone to piracy and use their knowledge of the area to recognize and pursue pirates.  Nevertheless, the PMPF’s main weakness is whether they have the capacity to sustain themselves and their capabilities without foreign funding and guidance from their former trainers. 

Applying These Lessons Elsewhere

The fight to stop piracy in Somalia is not over but lessons learned can be applied to other areas, such as the Gulf of Guinea, where piracy is on the rise.  These lessons are that changing the pirate’s operating environment alone will not eliminate piracy, as the pirates can and will adapt accordingly.  Instead, the problem must be solved on shore by going after the pirate center of gravity—their strongholds—to effectively disrupt their operations.  Although offshore attacks against these strongholds can yield some results, developing a disciplined local paramilitary force with greater capabilities than the pirates will disrupt their operations even more.  Creating such a force in a weak or failed state is difficult and is fraught with the danger of backfiring, but as demonstrated by the PMPF, it is not impossible.  Will the U.S. Navy and other international maritime forces pursue these proactive options in future areas where piracy becomes a problem?  Or will costly international task forces reactively patrolling offshore remain the norm?

Bret is a student at the Walsh School of Foreign Service at Georgetown University.  The views expressed are solely those of the author.

Swarms at Sea and Out-swarming the Swarms?

The Swarming Synchronized Speedboats of Iran’s Revolutionary Guards Corps Navy Revue

This week Foreign Policy posted a new article by Navy Postgraduate School professor John Arquilla, in which he discusses the how “swarm” tactics employed by the Russians caused the failure of Napoleon’s 1812 invasion.

Arquilla is a prolific author who regularly writes about swarms and “net-centric” operations.  In the above piece he cites successful maritime employment of swarm tactics such as German submarine “wolf-packs” in the Second World War and the Sri Lankan Navy’s fight against maritime elements of the Liberation Tigers of Tamil Eelam (LTTE, or “Tamil Tigers”) earlier this decade.

It is unclear how Arquilla’s example of the Russian defeat of Napoleon is applicable to a broad range of operations at sea, however.  When swarms are discussed in terms of maritime operations, it is generally in the context of an asymmetric fight within a constrained body of water, such as Iranian plans to use swarms of small boats or the Chinese Type 22 Houbei fast attack craft.  Napoleon’s Grand Armee was vulnerable to Russian swarm attacks on the march back from Moscow because of its extended supply lines.  In contrast, one of the primary advantages of sea power is that it provides the space for strategic maneuver and the ability to avoid such exposure to swarms.  Swarms and Anti-Access/Area Denial (A2AD) weapons and tactics could still threaten naval forces within specific areas in which the ability to maneuver is restricted, or are within the range of weapons on land, but they do not take away one of the main advantages of sea power, the ability for a state to choose where to best deploy its forces.

Lieutenant Commander Mark Munson is a Naval Intelligence Officer and currently serves on the OPNAV staff. He has previously served at Naval Special Warfare Group FOUR, the Office of Naval Intelligence and onboard USS ESSEX (LHD 2). The views expressed are solely those of the author and do not reflect the official viewpoints or policies of the Department of Defense or the U.S. Government.