Category Archives: Drones/Unmanned

Drones/Unmanned

Exercise Digital Horizon: Accelerating the Development of Unmanned Surface Vehicles

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By George Galdorisi

The international community has been tremendously proactive in undertaking operations, exercises, experiments, and demonstration to accelerate the development and fielding of unmanned surface vehicles, reflecting the real importance of these systems to world navies. Much of this work has occurred in and around the Arabian Gulf under the auspices of Commander U.S. Fifth Fleet and Task Force 59.

These ambitious exercises throughout the course of 2022 provided a learning opportunity for all participating navies. These culminated in the capstone unmanned event, Exercise Digital Horizon, a three-week event in the Middle East focused on employing artificial intelligence and 15 different unmanned systems: 12 unmanned surface vehicles (USVs) and three unmanned aerial vehicles (UAVs).

A key goal of Digital Horizon was to speed new technology integration across the 5th Fleet, and to seek cost-effective alternatives for Maritime Domain Awareness (MDA) missions. As Carrington Malin described the importance of Digital Horizon:

“Despite the cutting-edge hardware in the Arabian Gulf, Digital Horizon is far more than a trial of new unmanned systems. This exercise is about data integration and the integration of command and control capabilities, where many different advanced technologies are being deployed together and experimented with for the first time.

The advanced technologies now available and the opportunities that they bring to enhance maritime security are many-fold, but these also drive an exponential increase in complexity for the military. Using the Arabian Gulf as the laboratory, Task Force 59 and its partners are pioneering ways to manage that complexity, whilst delivering next-level intelligence, incident prevention and response capabilities.”1

Digital Horizon brought together emerging unmanned technologies and combined them with data analytics and artificial intelligence in order to enhance regional maritime security and strengthen deterrence by applying leading-edge technology and experimentation.2 Vice Admiral Brad Cooper, commander of U.S. Naval Forces Central Command, U.S. 5th Fleet and Combined Maritime Forces introduced the exercise and highlighted its potential: “I am excited about the direction we are headed. By harnessing these new unmanned technologies and combining them with artificial intelligence, we will enhance regional maritime security and strengthen deterrence. This benefits everybody.”3

Click to expand. Graphic illustration depicting the unmanned systems that will participate in exercise Digital Horizon 2022. The three-week unmanned and artificial intelligence integration event involved employing new platforms in the region for the first time. (U.S. Army graphic by Sgt. Brandon Murphy)

Captain Michael Brasseur, then-commodore of Task Force 59, emphasized the use of unmanned maritime vehicles to conduct intelligence, surveillance and reconnaissance missions, including identifying objects in the water and spotting suspicious behavior.4 He noted: “We pushed beyond technological boundaries and discovered new capabilities for maritime domain awareness to enhance our ability to see above, on and below the water.”5

During Digital Horizon, Task Force 59 leveraged artificial intelligence to create an interface on one screen, also called a “single pane of glass,” displaying the relevant data from multiple unmanned systems for watchstanders in Task Force 59’s Robotics Operations Center (ROC). Reviewing what was accomplished during this event, Captain Brasseur marveled at the pace of innovation: “We are challenging our industry partners in one of the most difficult operational environments, and they are responding with enhanced capability, fast.”6

One of the features of Digital Horizon, and in line with the first word of the exercise, “Digital,” was the ability of one operator to command and control five unique drones, a capability long-sought by U.S. Navy officials.7 The Navy is acutely aware of the high cost of manpower and is dedicated to moving beyond the current “one UXS, multiple joysticks, multiple operators,” paradigm that has plagued UXS development for decades.

Digital Horizon was a unique exercise from the outset. Task Force 59 worked with the Department of Defense’s Defense Innovation Unit (DIU) in order to leverage that organization’s expertise as a technology accelerator. Additionally, given the U.S. Navy’s ambitious goals to rapidly test and subsequently acquire USVs to populate the Fleet, CTF-59 used a contractor-owned/contractor operated (COCO) model to bring a substantial number of unmanned systems to Digital Horizon, well beyond those already in the inventory. This approach sidestepped the often clunky DoD acquisition system while providing appropriate oversight during the exercise and gaining operational experience with new systems.

MANAMA, Bahrain (Nov. 19, 2022) Various unmanned systems sit on display in Manama, Bahrain, prior to exercise Digital Horizon 2022. (U.S. Army photo by Sgt. Brandon Murphy)

Another distinctive feature of Digital Horizon involved launching and recovering small UAVs from medium-size USVs. This lash-up leveraged the capabilities of both unmanned assets, enabling the long-endurance USVs to carry the shorter-endurance UAVs to the desired area of operations. This “operationalized” a CONOPS that emerged from the U.S. Navy laboratory community years ago.8

The results of Digital Horizon lived up to the initial hype. During a presentation at the 2023 Surface Navy Association Symposium, here is how Vice Admiral Cooper described what was accomplished during Digital Horizon:

“We are creating a distributed and integrated network of systems to establish a “digital ocean” in the Middle East, creating constant surveillance. This means every partner and every sensor, collecting new data, adding it to an intelligent synthesis of around-the-clock inputs, encompassing thousands of images, from seabed to space, from ships, unmanned systems, subsea sensors, satellites, buoys, and other persistent technologies.

No navy acting alone can protect against all the threats, the region is simply too big. We believe that the way to get after this is the two primary lines of effort: strengthen our partnerships and accelerate innovation…One of the results from the exercise was the ability to create a single operational picture so one operator can command and control multiple unmanned systems on one screen, a ‘Single Pane of Glass’ (SPOG)…Digital Horizon was a visible demonstration of the promise and the power of very rapid tech innovation.”9

The results of Digital Horizon could change the way the world’s navies conduct maritime safety and security. Having multiple unmanned systems conduct maritime surveillance, with the operations center then using big data, artificial intelligence and machine learning to amalgamate this sea of data into something that commanders can use to make real-time decisions, enables navies to “stretch” their crewed vessels and use them for more vital missions than merely conducting surveillance.

As one example of how Digital Horizon brought together COTS unmanned surface vehicles with COTS systems and sensors, the T-38 Devil Ray was equipped with multiple state-of-the-art COTS sensors to provide persistent surveillance. The T-38 provided AIS, full motion video from SeaFLIR-280HD and FLIR-M364C cameras, as well as the display of radar contacts on a chart via the onboard Furuno DRS4D-NXT Doppler radar. These were all streamed back to Task Force 59’s Robotics Operations Center via high bandwidth radios and SATCOM.

These exercises and initiatives are important if the Navy is to convince a skeptical Congress that its plans for unmanned systems are sound, and represent an important course change in the way the Navy intends to communicate with Congress, by “showing, not telling” what its unmanned systems can do.10 This approach is vital, for as long as Congress remains unconvinced regarding the efficacy of the unmanned systems the Navy wishes to procure; it is unlikely that funding will follow.11

Secretary of the Navy, Carlos Del Toro, explained this new “show, don’t tell,” philosophy built on an ongoing series of exercises, experiments and demonstrations, further indicating that he believes the Navy is “on the same page as Congress:”

“The Navy has a responsibility to be able to prove that the technology that Congress is going to invest in actually works and it meets what we need to address the threat. I think that’s the responsible thing to do…I don’t see it as a fight between Congress and the Department of Navy. I think we’re aligned in our thinking about what has to be done.”12

Indeed, in remarks at the Reagan National Defense Forum, Secretary Del Toro said the Navy intends to stand up additional unmanned task forces around the globe modeled after what Task Force 59 accomplished during Digital Horizon, noting:

“We’ve demonstrated with Task Force 59 how much more we can do with these unmanned vehicles—as long as they’re closely integrated together in a [command and control] node that, you know, connects to our manned surface vehicles. And there’s been a lot of experimentation; it’s going to continue aggressively. And we’re going to start translating that to other regions of the world as well. That will include the establishment of formal task forces that will fall under some of the Navy’s other numbered fleets.”13

Secretary of the Navy Del Toro continued this drumbeat during the U.S. Naval Institute/AFCEA “West” Symposium in February 2023. In a keynote address describing the Navy’s progress and intentions regarding integrating unmanned systems into the Fleet, he emphasized the progress that CTF-59 had made, especially in the area of successfully integrating unmanned systems and artificial intelligence during Digital Horizon.14

A Marine Advanced Robotics WAM-V unmanned surface vessel operates in the Arabian Gulf, Nov. 29, during Digital Horizon 2022. (U.S. Army photo by Sgt. Brandon Murphy)

Importantly, the U.S. Navy has now created the infrastructure to accelerate the testing and evaluation of unmanned surface vehicles. In 2019, the Navy stood up Surface Development Squadron One to provide stewardship for unmanned experimentation and manned-unmanned teaming.15 In 2022, seeking to put additional emphasis on unmanned maritime vehicles, the Navy established Unmanned Surface Vessel Division One (USVDIV-1), under the command of Commander Jeremiah Daley.16

This new division oversees medium and large unmanned surface vessels out of Port Hueneme Naval Base in Ventura County.17 Unmanned Surface Vessel Division One is engaged with the Fleet to move the unmanned surface vessels further west and exercise autonomy, payloads, and hull, mechanical and electrical (HM&E) systems to ensure that future programs of record (LUSV and MUSV) are successful from inception, and that they provide lethality and combat effectiveness for future naval and joint forces.

Digital Horizon presages a new paradigm in the way navies will think about uncrewed assets, no longer as “vehicles” but rather as “systems” that are nodes in a web of assets delivering far greater capability than the sum of the parts. World navies will conduct ambitious unmanned exercises, experiments and demonstrations throughout 2023 and beyond, and the lessons learned from Digital Horizon will no doubt inform those efforts.

Captain George Galdorisi (USN – retired) is a career naval aviator whose thirty years of active duty service included four command tours and five years as a carrier strike group chief of staff. He began his writing career in 1978 with an article in U.S. Naval Institute Proceedings. He is the author of 15 books, including four New York Times best-sellers. The views presented are those of the author, and do not reflect the views of the Department of the Navy or the Department of Defense.

References

1. Carrington Malin, “A Testbed for Naval Innovation,” Middle East AI News, December 1, 2022.

2. Aaron-Matthew Lariosa, “US Navy Highlights TF 59 Contributions to Fleet’s Unmanned Vision,” Naval News, January 23, 2023.

3. “U.S. Launches New Unmanned & AI Systems Integration Event,” U.S. Naval Forces Central Command Public Affairs, November 23, 2022, accessed at: https://www.cusnc.navy.mil/Media/News/Display/Article/3226901/us-launches-new-unmanned-ai-systems-integration-event/.

4. J.P. Lawrence, “Navy’s ‘Influx’ of Aquatic and Aerial Drones Tested in the Middle East,” Stars and Stripes, December 1, 2022.

5. “Digital Horizon Wraps Up: Task Force 59 Perspective, Second Line of Defense, December 22, 2022.

6. Geoff Ziezulewicz, “New in 2023: Here Comes the First-Ever Surface Drone Fleet,” Navy Times, January 3, 2023.

7. Justin Katz, “Accenture Demos Data Vis, C2 for Multiple USVs During Navy’s Digital Horizons Exercise,” Breaking Defense, December 16, 2022.

8. Vladimir Djapic et al, “Heterogeneous Autonomous Mobile Maritime Expeditionary Robots and Maritime Information Dominance,” Naval Engineers Journal, December 2014.

9. Audrey Decker, “5th Fleet Commander Details ‘Digital Ocean’ After TF-59 Reaches FOC,” Inside the Navy, January 16, 2023.

10. See, for example, George Galdorisi, “Catch a Wave: Testing Unmanned Surface Vehicles Is Becoming an International Endeavour,” Surface SITREP, Winter 2022.

11. “Navy Failing to Make ‘Critical Pivot’ In Unmanned Investment,” Inside the Navy, October 10, 2022.

12. Justin Katz, “Show, Don’t Tell: Navy Changes Strategy to Sell Unmanned Systems to Skeptical Congress,” Breaking Defense, March 10, 2022.

13. Jon Harper, “Navy to Establish Additional Unmanned Task Forces Inspired by Task Force 59,” Defense Scoop, December 4, 2022.

14. Remarks by the Honorable Carlos Del Toro, Secretary of the Navy, at the U.S. Naval Institute/AFCEA “West” Symposium, February 16, 2023.

15. Meagan Eckstein, “Navy Stands Up Surface Development Squadron for DDG-1000, Unmanned Experimentation,” USNI News, May 22, 2019.

16. “Navy to Stand Up New USV Command This Summer,” Inside the Navy, January 13, 2022.

17. Joshua Emerson Smith and Andrew Dyer, “Navy Ramps Up Efforts on Unmanned Vessels,” San Diego Union Tribune, May 16, 2022, and Diana Stancy Correll, “Navy Creates Unmanned Surface Vessel Division to Expedite Integration of Unmanned Systems,” Navy Times, May 16, 2022.

Featured Image: T38 Devil Ray during Exercise Digital Horizon. (Photo by Dave Meron)

Drones/Unmanned

The Broadening Global Effort to Accelerate Unmanned Maritime Systems Development

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By George Galdorisi

While it will take years to unpack all of the lessons learned from the ongoing war in Ukraine, one method that has surfaced during this conflict that connects maritime warfare and unmanned surface vehicles in the use of USVs armed with explosives to attack naval vessels. This is a tactic and concept of operations that has been frequently discussed and simulated, but until now has been hypothetical.

Today it is real. As described in reports of Ukraine’s attacks on Russian naval vessels in the Black Sea, armed USVs have been used with deadly effect.1 Consider how naval analyst H.I. Sutton described the momentous impact of these attacks and what they portend for the future of maritime warfare:

“Ukraine’s attack on Sevastopol on October 29, 2022 will go down in history as the first major example of what many believe is a new era of drone warfare. The Russian Navy Black Sea Fleet found itself defending against both surface and aerial drones. Seven uncrewed surface vessels (USVs) were involved, along with nine uncrewed air vehicles (UAVs)…Individually, they may pose only a limited danger, but their low cost and the low risk associated with their use likely will lead to them becoming a persistent threat. They may shape future wars just as their aerial counterparts are already doing. But will leading navies accept the obvious lessons and initiate similar low-cost armed USVs?”2

In this era of great power competition, unmanned maritime systems have begun to take center stage and are now on an accelerated development path for reasons that are clear. Like their air and ground counterparts, these unmanned maritime systems are valued because of their ability to reduce the risk to human life in high-threat environments, offer options for more aggressive and risk-worthy strategies, to deliver persistent surveillance over areas of interest, and other options that derive from the inherent advantages of unmanned technologies.

To be clear, the accelerating development of unmanned maritime systems has not been restricted to the United States. The U.S. Navy is far from being the only navy keenly interested in unmanned surface vehicles. Indeed, 2022 may well be remembered as a key milestone for the development of USVs due to their inclusion in an unprecedented number of international exercises, experiments, and demonstrations that have spanned the globe. Over the course of these events, unmanned maritime systems have performed an increasingly ambitious and complex series of missions, giving greater confidence to those nations and navies who see them as an important part of their fleets. The highlights of these events show the keen interest of many navies in finding new roles for these unmanned systems.

International Maritime Exercise 2022 (IMX 22), held under the auspices of U.S. Naval Forces Central Command, Commander Task Force 59 in the Arabian Gulf, focused on the integration of manned and unmanned vessels, and included operations with a number of regional partners.3 Admiral Michael Gilday, U.S. Navy Chief of Naval Operations, noted that a key mission for TF-59 is to “Enable more rapid fielding of unmanned systems.”4 Navies and Coast Guards of the nations and navies involved in IMX 22 worked to fully explore the capabilities of unmanned systems such as the Saildrone, the MARTAC MANTAS and Devil Ray, and many other USVs from participating nations.5 This is the first time this many nations participated in an event of this type. In the run up to IMX 2022, the Commander of U.S. Naval Forces Central Command, U.S. 5th Fleet, Vice Admiral Brad Cooper, also noted: “The Navy has been working with manufacturers to test new technologies, including firms such as Saildrone and MARTAC under a contractor-owned, contractor-operated model.”6

Fast response cutter USCGC Glen Harris (WPC 1144) sails near a U.S sail drone explorer in the Gulf of Aqaba, during the International Maritime Exercise/Cutlass Express (IMX) Feb. 13, 2022. (U.S. Army photo by Cpl. DeAndre Dawkins)

What is noteworthy about TF 59 operations in the Arabian Gulf is the fact that IMX 22 was not a one-off event. Rather, manned-unmanned integration operations in the Arabian Gulf continue. In October 2022, the United Kingdom and the United States held joint drills in the Arabian Gulf in the wake of Iran’s seizure of a U.S. Navy Saildrone USV.7 As of the end of 2022, the U.S. Navy had 20 USVs in or near the waters of the Arabian Gulf.8 Indeed, the United States and its allies want a force of 100 unmanned surface vessels patrolling waters from the Red Sea into the Arabian Gulf by the end of 2023.9

In another international exercise focused on missions for unmanned maritime systems, the Australian Defence Force (ADF) hosted Exercise Autonomous Warrior 2022 (AW 22). Nations joining this Royal Australian Navy-led exercise included New Zealand, the United Kingdom, and the United States while featuring a total of 30 autonomous systems. The unmanned surface vehicles that were part of this two-week exercise were the Saildrone, MANTAS and Devil Ray, the Atlas Elektronik ARCIMS, the Elbit Systems Australia SEAGULL, and the Ocius Bluebottle.

Another exercise, the biannual Rim of the Pacific Exercise (the world’s largest international maritime exercise) was especially noteworthy as the U.S. Navy inserted four unmanned surface vehicles in this major event. Two of these USVs included platforms that were purpose-built to be unmanned systems, including the Sea Hunter and the Sea Hawk. The other two systems—Nomad and Ranger—were previously manned vessels that were equipped with autonomous technology under the auspices of the Ghost Fleet Overlord program. The 2022 RIMPAC exercise gave the event’s 26 participating nations an opportunity to see these USVs in action. The U.S. Third Fleet Commander, Vice Admiral Michael Boyle, the commander of RIMPAC 2022, put special emphasis on the unmanned vehicles participating in RIMPAC, as well as manned-unmanned integration:

“What’s also new in this RIMPAC is a lot more integration of unmanned systems—on the surface, in the air, and under the surface. The four unmanned surface vehicles that the Navy brought to the exercise carried specialized payloads for anti-submarine warfare, intelligence, surveillance and reconnaissance, domain awareness and communications capability. So that’s all kind of new.”10

RIMPAC was valuable for getting deckplate-level feedback from sailors operating these four USVs. One official from the Navy’s program office for unmanned maritime systems noted that “One of the biggest pieces of feedback we’re getting is that they’re [sailors operating these USVs during RIMPAC] talking about payloads, they’re talking about capabilities. They’re not talking about the autonomy. They’re not worried that [the USV is] going to ever run into something.”11

A Devil Ray and Saildrone USV operate during exercise IMX 2022. (Photo courtesy of Dave Meron)

On the other side of the world, NATO exercises REPMUS-22, and the follow-on Dynamic Messenger 22, provided an opportunity for NATO nations to evaluate unmanned systems and their ability to coordinate on, above, and under the sea. Led by Portugal and conducted near the Troia Peninsula, these exercises focused on the integration of 120 autonomous assets into a single network.12 A number of NATO commands participated, including NATO’s Allied Command Transformation, NATO’s Allied Maritime Command, the NATO Center of Excellence, and NATO Center for Maritime Research and Experimentation. This enabled partner nations to learn best practices regarding how to shepherd unmanned systems into their respective navies.

In late 2022, the U.S. Navy-led exercise Digital Horizon 2022, a three-week event in the Middle East, focused on employing artificial intelligence and 15 different unmanned systems (12 USVs and three UAVs), many of which were operated in the region for the first time. The exercise, meant to be a continuation of IMX 22 but at significantly larger scale, was hosted by Task Force 59, and built on the work done during IMX 22. Indeed, Digital Horizon is the largest international unmanned exercise ever held to date.

Digital Horizon brought together new, emerging unmanned technologies and combined them with data analytics and artificial intelligence to enhance regional maritime security and strengthen deterrence. The exercise featured 17 companies that collectively brought 15 different types of unmanned systems, ten of which operated with US 5th Fleet for the first time.13 As Captain Michael Brasseur, then-commodore of Task Force 59, noted, one of the objectives of Digital Horizon 2022 was to use unmanned maritime vehicles to conduct intelligence surveillance and reconnaissance missions, including identifying objects in the water and spotting suspicious behavior.14

From the perspective of the U.S. Navy, these exercises and initiatives are important and represent a significant course change as the Navy works to convince Congress that its plans for unmanned systems are sound. The development and fielding of these unmanned systems will ultimately be critical for the U.S. Navy to reverse decades of pressure that have long threatened to shrink its force structure. Secretary of the Navy Carlos Del Toro explained the Navy’s new “show, don’t tell” philosophy built on an ongoing series of exercises, experiments, and demonstrations. According to Secretary Del Toro, these events further indicate that the Navy is “On the same page as Congress.” As Del Toro described it:

“The Navy has a responsibility to be able to prove that the technology that Congress is going to invest in actually works and it meets what we need to address the threat. I think that’s the responsible thing to do…I don’t see it as a fight between Congress and the Department of Navy. I think we’re aligned in our thinking about what has to be done.”15

Conclusion 

World navies are keen to bring more both commercial-off-the-shelf (COTS) unmanned maritime systems, as well as other USVs in various stages of development, to exercises, experiments and demonstrations. This will enable them to not only demonstrate their own capabilities, but to also learn best practices by observing the operations of unmanned maritime systems of other nations. These efforts are virtually certain to accelerate the development of these USVs, and for the U.S. Navy, hasten the goal of a 500-ship Navy that is envisioned to one day have 350 crewed ships and 150 unmanned vessels working together.

Captain George Galdorisi (USN – retired) is a career naval aviator whose thirty years of active duty service included four command tours and five years as a carrier strike group chief of staff. He began his writing career in 1978 with an article in U.S. Naval Institute Proceedings. He is the author of 15 books, including four New York Times best-sellers. The views presented are those of the author, and do not reflect the views of the Department of the Navy or the Department of Defense.

References

1. “Ukrainian Ingenuity is Ushering in a New Form of Warfare At Sea,” The Economist, December 7, 2022. See also, Mark Bowden, “The Tiny and Nightmarishly Efficient Future of Drone Warfare,” The Atlantic, November 22, 2022.

2. H.I. Sutton, “USVs at Work in the Black Sea,” U.S. Naval Institute Proceedings, December 2022.

3. “Navy Leading International Unmanned Task Force in Large-Scale Exercise,” Inside the Navy, February 7, 2022.

4. Nick Wilson, “Gilday Looks to Expand Unmanned Development in Task Force 59,” Inside the Navy, September 5, 2022.

5. “U.S. Navy Tests Unmanned-Vessel Teaming in Persian Gulf,” The Maritime Executive, October 26, 2021.

6. Mallory Shelbourne, “U.S. 5th Fleet Set to Expand Unmanned Ship Operations in Middle East,” USNI News, January 14, 2022.

7. Jon Gambrell, “US, UK Hold Drone Drill in Persian Gulf After Iran Seizures,” Navy Times, October 7, 2022.

8. Caitlin Kenney, “U.S.-Led Drone Fleet Starting To Come Together in Middle East,” Defense One, October 13, 2022.

9. Sam LaGrone, “Navy Wants 100 Unmanned Ships Monitoring Middle East Waters by Next Year,” USNI News, October 11, 2022.

10. Sean Carberry, “SPECIAL REPORT: Unmanned Systems Make a Splash During RIMPAC,” National Defense, August 16, 2022.

11. Justin Katz, “After RIMPAC, Sailor Feedback Shows Evolving View of Unmanned Vessels: Officials,” Breaking Defense, August 2, 2022.

12. “NATO Allied Nations’ Forces Conduct Portugal-led Exercise REPMUS 22,” Naval Technology, September 16, 2022.

13. Justin Katz, “3 weeks, 15 Unmanned Systems: Navy launches ‘Digital Horizon’ Exercise in Middle East,” Breaking Defense, November 23, 2022.

14. J.P. Lawrence, “Navy’s ‘Influx’ of Aquatic and Aerial Drones Tested in the Middle East,” Stars and Stripes, December 1, 2022.

15. Justin Katz, “Show, Don’t Tell: Navy Changes Strategy to Sell Unmanned Systems to Skeptical Congress,” Breaking Defense, March 10, 2022.

Featured Image: The Devil Ray USV in exercise Autonomous Warrior 2022 (Photo courtesy of Dave Meron)

Drones/Unmanned

Naval Escalation in an Unmanned Context

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By Jonathan Panter

On March 14, two Russian fighter jets intercepted a U.S. Air Force MQ-9 Reaper in international airspace, breaking one of the drone’s propellers and forcing it to crash into the Black Sea. The Russians probably understood that U.S. military retaliation – or, more importantly, escalation – was unlikely; wrecking a drone is not like killing people. Indeed, the incident contrasts sharply with the recent revelation of another aerial face-off. In late 2022, Russian aircraft nearly shot down a manned British RC-135 Rivet Joint surveillance aircraft. With respect to escalation, senior defense officials later indicated, the latter incident could have been severe.1

There is an emerging view among scholars and policymakers that unmanned aerial vehicles can reduce the risk of escalation, by providing an off-ramp during crisis incidents that, were human beings involved, might otherwise spark public calls for retaliation. Other recent events, such as the Iranian shoot-down of a U.S. RQ-4 Global Hawk in the Persian Gulf in 2019 – which likewise did not spur U.S. military kinetic retaliation – lend credence to this view. But in another theater, the Indo-Pacific, the outlook for unmanned escalation dynamics is uncertain, and potentially much worse. There, unmanned (and soon, autonomous) military competition will occur not just between aircraft, but between vessels on and below the ocean.

Over the past two decades, China has substantially enlarged its navy and irregular maritime forces. It has deployed these forces to patrol its excessive maritime claims and to threaten Taiwan, expanded its nuclear arsenal, and built a conventional anti-access, area-denial capacity whose overlap with its nuclear deterrence architecture remains unclear. Unmanned and autonomous maritime systems add a great unknown variable to this mix. Unmanned ships and submarines may strengthen capabilities in ways not currently anticipated; introduce unexpected vulnerabilities across entire warfare areas; lower the threshold for escalatory acts; or complicate each side’s ability to make credible threats and assurances.

Forecasting Escalation Dynamics

Escalation is a transition from peace to war, or an increase in the severity of an ongoing conflict. Many naval officers assume that unmanned ships are inherently de-escalatory assets due to their lack of personnel onboard. Recent high-profile incidents – such as the MQ-9 Reaper and RQ-4 Global Hawk incidents mentioned previously – seem, at first glance, to confirm this assumption. The logic is simple: if one side destroys the other’s unmanned asset, the victim will feel less compelled to respond, since no lives were lost.

While enticing, this assumption is also illusory. First, the example is of limited applicability: most unmanned ships and submarines under development will not be deployed independently. They will work in tandem with each other and with manned assets, such that the compromise of one vessel – potentially by cyber means – often affects others, changing a force’s overall readiness. The most serious escalation risk thus lies at a systemic, or fleetwide, level – not at the level of individual shoot-downs.

Second, lessons about escalation from two decades of operational employment of unmanned aircraft cannot be imported, wholesale, to the surface and subsurface domains – where there is little to no operational record of unmanned vessel employment. The technology, operating environments, expected threats, tactics, and other factors differ substantially.

Our understanding of one variant of escalation, that in the nuclear realm, is famously theoretical – the result of deductive logic, modeling, or gaming – rather than empirical, since nuclear weapons have only been used once in conflict, and never between two nuclear powers. Right now, the story is similar for unmanned surface and subsurface vessels. Neither side has deployed unmanned vessels at in sufficient numbers or duration, and across a great enough variety of contexts, for researchers to draw evidence-based conclusions. Everything remains a projection.

Fortunately, three existing areas of academic scholarship – crisis bargaining, inadvertent nuclear escalation, and escalation in cyberspace – provide some clues about what naval escalation in an unmanned context might look like.

Crisis Bargaining

During international crises, a state may try to convince its opponent that it is willing to fight over an issue – and that, if war were to break out, it would prevail. The goal is to get what you want without actually fighting. To intimidate an opponent, a state might inflate its capabilities or hide its weaknesses. To convince others of its willingness to fight, a state might take actions that create a risk of war, such as mobilizing troops (so-called “costly signals”). Ascertaining capability and intent in international crises is therefore quite difficult, and misjudging either may lead to war.2

Between nuclear-armed states, these phenomena are more severe. Neither side wants nuclear war, nor believes that the other is willing to risk it. To make threats credible, therefore, states may initiate an unstable situation (“rock the boat”) but then “tie their own hands” so that catastrophe can be averted only if the opponent backs down. States do this by, for example, automating decision-making, or stationing troops in harm’s way.3

The proliferation of unmanned and autonomous vessels promises to impact all of these crisis bargaining strategies. First – as noted previously – unmanned vessels may be perceived as “less escalatory,” since deploying them does not risk sailors’ lives. But this perception could have the opposite effect, if states – believing the escalation risk to be lower – deploy their unmanned vessels closer to an adversary’s territory or defensive systems. The adversary might, in turn, believe that his opponent is preparing the battlespace, or even that an attack is imminent. Economists call this paradox “moral hazard.” The classic example is an insured person’s willingness to take on more risk.

Second, a truly autonomous platform – one lacking a means of being recalled or otherwise controlled after its deployment – would be ideal for “tying hands” strategies. A state could send such vessels to run a blockade, for instance, daring the other side to fire first. Conversely, an unmanned (but not autonomous) vessel might have remote human operators, giving a state some leeway to back down after “rocking the boat.” In a crisis, it may be difficult for an adversary to distinguish between the two types of vessels.

A further complication arises if a state misrepresents a recallable vessel as non-recallable, perhaps to gain the negotiating leverage of “tying hands,” while maintaining a secret exit option. And even if an autonomous vessel is positively identified as such, attributing “intent” to it is a gray area. The more autonomously a vessel operates, the easier it is to attribute its behaviors to its programming, but the harder it is to determine whether its actions in a specific scenario are intended by humans (versus being default actions or error).

Unmanned Aerial Vehicles?

Scholars have begun to address such questions by studying unmanned aerial systems.4 To give two recent examples, one finding suggests that unmanned aircraft may be de-escalatory assets, since the absence of a pilot means domestic publics would be less likely to demand blood-for-blood if a drone gets shot down.5 Another scholar finds that because drones combine persistent surveillance with precision strike, they can “increase the certainty of punishment” – making threats more credible.6

Caution should be taken in applying such lessons to the maritime realm. First, unmanned ships and submarines are decades behind unmanned aerial vehicles in sophistication. Accordingly, current plans point to a (potentially decades-long) roll-out period during which unmanned vessels will be partially or optionally manned.7 Such vessels could appear unmanned to an adversary, when in fact crews are simply not visible. This complicates rules of engagement, and warps expectations for retaliation if a state targets an apparently-unmanned vessel that in fact has a skeleton crew.

Second, ships and submarines have much longer endurance times than aircraft. Hence, mechanical and software problems will receive less frequent local troubleshooting and digital forensic examination. An aerial drone that suffers an attempted hack will return to base within a few hours; not so with unmanned ships and submarines because their transit and on-station times are much longer, especially those dispersed across a wide geographic area for distributed maritime operations. This complicates efforts to attribute failures to “benign” causes or adversarial compromise. The question may not be whether an attempted attack merits a response due to loss of life, but rather whether it represents the opening salvo in a conflict.

Finally, with regard to the combination of persistent surveillance and precision strike, most unmanned maritime systems in advanced stages of development for the U.S. Navy do not combine sensing and shooting. Small- and medium-sized surface craft, for instance, are much closer to deployment than the U.S. Navy’s “Large Unmanned Surface Vessel,” which is envisioned as an adjunct missile magazine. The small- and medium-sized craft are expected to be scouts, minesweepers, and distributed sensors. Accordingly, they do little for communicating credible threats, but do present attractive targets for a first mover in a conflict, whose opening goal would be to blind the adversary.

Inadvertent Nuclear Escalation

During conventional war, even if adversaries carefully avoid targeting the other side’s nuclear weapons, other parts of a military’s nuclear deterrent may be dual-use systems. An attack on an enemy’s command-and-control, early warning systems, attack submarines, or the like – even one conducted purely for conventional objectives – could make the target state fear that its nuclear deterrent is in danger of being rendered vulnerable.8 This fear could encourage a state to launch its nuclear weapons before it is too late. Incremental improvements to targeting and sensing in the past two decades – especially in the underwater realm – have exacerbated the problem by making retaliatory assets easier to find and destroy.9

In the naval context, the risk is that one side may perceive a “use it or lose it” scenario if it feels that its ballistic missile submarines have all been (or are close to being) located. In particular, the ever-wider deployment of assets that render the underwater battlespace more transparent – such as small, long-duration underwater vehicles equipped with sonar – could undermine an adversary’s second-strike capability. Today, the US Navy’s primary anti-submarine platforms aggregate organic sensing and offensive capabilities (surface combatants, attack submarines, and maritime patrol aircraft). The shift to distributed maritime operations using unmanned platforms, however, portends a future of disaggregated capabilities. Small platforms without onboard weapons systems will still provide remote sensing capability to the joint force. If these sensing platforms are considered non-escalatory because they lack offensive capabilities and sailors onboard, the US Navy might deploy them more widely.10

Escalation in Cyberspace

The US government’s shift to persistent engagement in cyberspace, a strategy called “Defend Forward,”11 has underscored two debates on cyber escalation. The first concerns whether operations in the cyber domain expose previously secure adversarial capabilities to disruption, shifting incentives for preemption on either side.12 The second concerns whether effects generated by cyberattacks (i.e., cyber effects or physical effects) can trigger a “cross-domain” response.13

These debates remain unresolved. Narrowing the focus to cyberattacks on unmanned or autonomous vessels presents an additional challenge for analysis, because these technologies are nascent and efforts to ensure their cyber resilience remain classified. Platforms without crews may present an attractive cyber target, perhaps because interfering with the operation of an unmanned vessel is perceived as less escalatory since human life is not directly at risk.

But a distinction must be made between the compromise of a single vessel and its follow-on effects at a system, or fleetwide level. Based on current plans, unmanned vessels are most likely to be employed as part of an extended, networked hybrid fleet. If penetrating one unmanned vessel’s cyber defenses can allow an adversary to move laterally across a network, this “effect” may be severe, potentially affecting a whole mission or warfare area. The subsequent decline in offensive or defensive capacity at the operational level of war could shift incentives for preemption. Since unmanned vessels operating as part of a team (with other unmanned vessels or with manned ones) are dependent on beyond-line-of-sight communications, interruption of one of these pathways (e.g., disabling a geostationary satellite over the area of operations) could have a similar systemic effect.

The Role of Human Judgment

Modern naval operations already depend on automated combat systems, lists of “if-then” statements, and data links. For decades, people have increasingly assigned mundane and repetitive (or computationally laborious) shipboard tasks to computers, leaving officers and sailors in a supervisory role. This state of affairs is accelerating with the introduction of unmanned and autonomous vessels, especially when combined with artificial intelligence. These technologies are likely to make human judgment more, not less, important.14 Many future naval officers will be designers, regulators, or managers of automated systems. So too will civilian policymakers directing the use of unmanned and autonomous maritime systems to signal capability and intent in crisis. For both policymakers and officers, questions requiring substantial judgment will include:

The “moral hazard” problem. If unmanned vessels are perceived as less escalatory – because they lack crews, or because they carry only sensors and no offensive capabilities – are they more likely to be employed in ways that incur other risks (such as threatening adversary defensive or nuclear deterrent capabilities in peacetime)?

The autonomy/intent paradox. When will an autonomous vessel’s action be considered a signal of an adversary’s intent (since the adversary designed and coded the vessel to act a certain way), versus an action that the vessel “decided” to take on its own? If an adversary claims ignorance – that he did not intend an autonomous vessel to act a certain way – when will he be taken at his word?15

The attribution problem. Since unmanned vessels have no crews, local troubleshooting of equipment – along with digital forensics – will occur less frequently than it does on manned vessels. Remotely attributing a problem to routine component or software failure, versus to adversarial cyberattack, will often be harder than it would be with physical access. Will there have to be a higher “certainty threshold” for positive attribution of an attack on an unmanned vessel?

The “roll-out” uncertainty. How will the first few decades of hybrid fleet operations (utilizing partial and optional-manning constructs) complicate the decision to target or compromise unmanned vessels? If a vessel appears unmanned, but has an unseen skeleton crew – and then suffers an attack – how should the target state assess the attacker’s claim of ignorance about the presence of personnel onboard?

The cyber problem. Do unmanned systems’ attractiveness as a cyber target (due to their absence of personnel, often highly-networked employment) present a system-wide vulnerability to those warfare areas than lean more heavily on unmanned systems than others? Which warfare areas would have to be affected to change incentives for preemption?

Since unmanned vessels have not yet been broadly integrated into fleet operations, these questions have no definitive, evidence-based answers. But they can help frame the problem. The maritime domain in East Asia is already particularly susceptible to escalation. Interactions between potential foes should, ideally, never escalate without the consent and direction of policymakers. But in practice, interactions-at-sea can escalate due to hyper-local misperceptions, influenced by factors like command, control, and communications, situational awareness, or relative capabilities. All of these factors are changing with the advent of unmanned and autonomous platforms. Escalation in this context cannot be an afterthought.

Jonathan Panter is a Ph.D. candidate in Political Science at Columbia University. His research examines Congressional oversight over U.S. naval operations. Prior to attending Columbia, Mr. Panter served as a Surface Warfare Officer in the United States Navy. He holds an M.Phil. and M.A. in Political Science from Columbia, and a B.A. in Government from Cornell University.

The author thanks Johnathan Falcone, Anand Jantzen, Jenny Jun, Shuxian Luo, and Ian Sundstrom for comments on earlier drafts of this article.

References

1. Thomas Gibbons-Neff and Eric Schmitt, “Miscommunication Nearly Led to Russian Jet Shooting Down British Spy Plane, U.S. Officials Say,” New York Times, April 12, 2023, https://www.nytimes.com/2023/04/12/world/europe/russian-jet-british-spy-plane.html.

2. James D. Fearon, “Rationalist Explanations for War,” International Organization 49, no. 3 (Summer 1995): 379-414.

3. Thomas C. Schelling, Arms and Influence (New Haven: Yale University Press, [1966] 2008), 43-48, 99-107.

4. See, e.g., Michael C. Horowitz, Sarah E. Kreps, and Matthew Fuhrmann, “Separating Fact from Fiction in the Debate over Drone Proliferation,” International Security 41, no. 2 (Fall 2016): 7-42.

5. Erik Lin-Greenberg, “Wargame of Drones: Remotely Piloted Aircraft and Crisis Escalation,” Journal of Conflict Resolution (2022). See also Erik Lin-Greenberg, “Game of Drones: What Experimental Wargames Reveal About Drones and Escalation,” War on the Rocks, January 10, 2019, https://warontherocks.com/2019/01/game-of-drones-what-experimental-wargames-reveal-about-drones-and-escalation/.

6. Amy Zegart, “Cheap flights, credible threats: The future of armed drones and coercion,” Journal of Strategic Studies 43, no. 1 (2020): 6-46.

7. Sam Lagrone, “Navy: Large USV Will Require Small Crews for the Next Several Years,” USNI News, August 3, 2021, https://news.usni.org/2021/08/03/navy-large-usv-will-require-small-crews-for-the-next-several-years.

8. Barry D. Posen, Inadvertent Escalation (Ithaca: Cornell University Press, 1991); James Acton, “Escalation through Entanglement: How the Vulnerability of Command-and-Control Systems Raises the Risks of an Inadvertent Nuclear War,” International Security 43, no. 1 (Summer 2018): 56-99. For applications to contemporary Sino-US security competition, see: Caitlin Talmadge, “Would China Go Nuclear? Assessing the Risk of Chinese Nuclear Escalation in a Conventional War with the United States,” International Security 41, no. 4 (Spring 2017): 50-92; Fiona S. Cunningham and M. Taylor Fravel, “Dangerous Confidence? Chinese Views on Nuclear Escalation,” International Security 44, no. 2 (Fall 2019): 61-109; and Wu Riqiang, “Assessing China-U.S. Inadvertent Nuclear Escalation,” International Security 46, no. 3 (Winter 2021/2022): 128-162.

9. Keir A. Lieber and Daryl G. Press, “The New Era of Counterforce,” International Security 41, no. 4 (Spring 2017): 9-49; Rose Goettemoeller, “The Standstill Conundrum: The Advent of Second-Strike Vulnerability and Options to Address It,” Texas National Security Review 4, no. 4 (Fall 2021): 115-124.

10. Jonathan D. Caverley and Peter Dombrowski suggest that one component of crisis stability – the distinguishability of offensive and defensive weapons – is more difficult at sea because naval platforms are designed to perform multiple missions. From this perspective, disaggregating capabilities might improve offense-defense distinguishability and prove stabilizing, rather than escalatory. See: “Cruising for a Bruising: Maritime Competition in an Anti-Access Age.” Security Studies 29, no. 4 (2020): 680-681.

11. For an introduction to this strategy, see: Michael P. Fischerkeller and Robert J. Harknett, “Persistent Engagement, Agreed Competition, and Cyberspace Interaction Dynamics and Escalation,” Cyber Defense Review (2019), https://cyberdefensereview.army.mil/Portals/6/CDR-SE_S5-P3-Fischerkeller.pdf.

12. Erik Gartzke and John R. Lindsay, “Thermonuclear Cyberwar,” Journal of Cybersecurity 3, no. 1 (March 2017): 37-48; Erica D. Borghard and Shawn W. Lonergan, “Cyber Operations as Imperfect Tools of Escalation,” Strategic Studies Quarterly 13, no. 3 (Fall 2019): 122-145.

13. See, e.g., Sarah Kreps and Jacquelyn Schneider, “Escalation firebreaks in the cyber, conventional, and nuclear domains: moving beyond effects-based logics,” Journal of Cybersecurity 5, no. 1 (Fall 2019): 1-11; Jason Healey and Robert Jervis, “The Escalation Inversion and Other Oddities of Situational Cyber Stability,” Texas National Security Review 3, no. 4 (Fall 2020): 30-53.

14. Avi Goldfarb and John R. Lindsay, “Prediction and Judgment: Why Artificial Intelligence Increases the Importance of Humans in War,” International Security 46, no. 3 (Winter 2021/2022): 7-50.

15. The author thanks Tove Falk for this insight.

Featured Image: A medium displacement unmanned surface vessel and an MH-60R Sea Hawk helicopter from Helicopter Maritime Strike Squadron (HSM) 73 participate in U.S. Pacific Fleet’s Unmanned Systems Integrated Battle Problem (UxS IBP) April 21, 2021. (U.S. Navy photo by Chief Petty Officer Shannon Renf)

Drones/Unmanned

Every Ship a SAG and the LUSV Imperative

3 Comments

By Lieutenant Kyle Cregge, USN

The US Navy’s strike capacity is shrinking. As highlighted in Congressional testimony with senior leaders, the Surface Navy is set to lose 788 Vertical Launch System (VLS) cells through the end of the Davidson Window in 2027. This 8.85% of current Surface Navy VLS capacity represents the equivalent of eight Arleigh Burke-class destroyers leaving the fleet as the Ticonderoga cruisers are retired. However, even the most aggressive and expensive shipbuilding alternative would not return equivalent VLS numbers to the surface fleet until the late 2030s. Present maritime infrastructure capacity further strangles efforts to buy additional Arleigh Burke destroyers, Constellation-class frigates, and Virginia-class submarines. These complex multi-mission ships cost billions of dollars and years of investment in build times, and yet service life extension proposals are equally unsavory. From extending aging Ticonderoga cruisers to arming merchants or Expeditionary Fast Transports, none are cheap, scalable, or sustainable in the long-term. All this while the world’s largest navy, the People’s Liberation Army Navy (PLAN), continues its building spree at speed and scale, delivering combatants equipped with long-range anti-ship missiles meant to challenge America’s role as balancer in Eurasia.

Figure 1. Click to expand. Surface Ship VLS Data, Adopted from the CBO’s analysis of the Navy’s FY23 Shipbuilding Plan.

Where can the Surface Navy focus its efforts for future growth given the financial constraints and maritime industrial base capacity? What capabilities are most likely to enable a replaceable, lethal force to deter or deny Chinese aggression from the Taiwan Strait to the Second Island Chain?

The Surface Navy must build and deploy the Large Unmanned Surface Vehicle (LUSV) at scale as small surface combatants, to economically restore and grow VLS capacity over the next decade. A concept for its implementation and other USVs like it, “Every Ship a SAG,” proposes a distributed future force architecture, where every manned ship can operate far afield from each other, while each is surrounded by multiple VLS-equipped and optionally manned LUSVs. Doctrinally, a Surface Action Group (SAG) is defined as a temporary or standing organization of combatant ships, other than aircraft carriers, tailored for a specific tactical mission. Together, these manned-unmanned teams will form more lethal SAGs than a single ship or manned surface action group operating alone. Led by Surface Warfare Lieutenants as Unmanned Task Group Commanders, this USV-augmented SAG offers a lethal instantiation of the next-generation hybrid fleet.

“Every Ship a SAG” provides a scalable and flexible model for incorporating current and future unmanned systems with the existing surface fleet. The fleet could rapidly up-gun conventional platforms and even amphibious ships, Littoral Combat Ships (LCS), or Expeditionary Staging Bases (ESB) with more lethal USVs as teammates. Lastly, “Every Ship a SAG” offers mitigation for many of the concerns levied at Navy USV concepts, including Hull, Mechanical, and Electrical (HM&E) reliability, maintenance, and spare parts; force protection; C5I/Networks; autonomy; and the role of USVs in deterrence. Mutual support from a manned ship reduces operational risk and will enable the small crew led by the Surface Warfare Early Commander to embark on their USV to execute critical manned operations during dangerous or restricted waters evolutions. These small teams then debark to a designated mothership and perform USV mission integration when the USV is in an unmanned mode. “Every Ship a SAG” offers a critical next step between today’s nascent USV capability and a more advanced, USV-forward, and independent future.

Now is a critical moment in history. LUSVs must be scaled to meet the Navy’s warfighting mission, and Congress must resource the supporting pillars to ensure effective outcomes. When every manned US Navy ship is a Surface Action Group, this distributed hybrid fleet will be more lethal, survivable, and ready to fight and win maritime wars against peer adversaries.

Defining “Every Ship a SAG”

The Secretary of the Navy and the Chief of Naval Operations have consistently argued for the introduction of unmanned systems and their incorporation into the fleet. Leaders have envisioned LUSV as a 200-300ft low-cost, high endurance, and reconfigurable corvette accommodating up to 32 VLS cells. The ship is programmed to be bought in Fiscal Year 2025 with subsequent buys out to 2027 with a three-ship purchase at $241 million per ship. The Navy’s unmanned strategies have referred to LUSVs as “adjunct magazines,” providing greater strike and anti-surface warfare weapons. This vision is appropriate, but has narrowly scoped the ship’s offensive technical capabilities. Myriad experts have penned compelling, lengthy vignettes illustrating USVs in the fleet, with advantages including sensor networking, depth of fire, survivability, and many others.

The “Every Ship a SAG” construct offers a vision for weaponized USVs that is easily understood; from the average fleet sailor to senior leaders to (maybe most critically) Congress. In addition, the concept acknowledges the current fleet design both in Strike Groups and Surface Action Groups, while facilitating the introduction of unmanned ships within a task organization framework common to manned units. Operationally, LUSVs will meet specific, near-term needs in support of national strategies via distributed sea denial and strike, while enhancing the lethality of the surface fleet through increased missile magazine distribution and capacity. When integrated into the force, LUSVs will increase the survivability of the fleet by complicating an adversary’s ability to target and attack surface forces. What does this look like in practice?

In a peacetime environment and workup cycle, the Unmanned Operations Center (UOC) and USV Divisions in Port Hueneme, California, or a local Fleet Maritime Operations center, would manage the traditional “manning,” training, and equipping functions of ship workup cycles towards integrating into Strike Groups and SAGs. These LUSV Divisions would be led by Early Command Junior Officers. In fact, the Surface Community has already begun selecting officers for Unmanned Task Group Early Command roles both in Port Hueneme and in Bahrain with Task Force 59.

Having been assigned to units for scheduled deployments, LUSVs would attach to the designated ships in the deployment group, providing greater flexibility to Combatant Commanders in force packages. Just as the MH-60 Romeo community deploys expeditionary detachments of pilots and aircrew to cruisers and destroyers, these Early Command officers and a small crew would embark a ship, or series of ships, serving in a variety of modalities as expert controllers, emergency maintainers, and expeditionary operators. A key distinction between the helicopter detachment concept and command is the interchangeability of USVs, moving from independent expeditionary command with a manned crew, to embarking on a mothership or series of motherships supporting unmanned operations.

Figure 2: A top-level view comparing USV employment models with generalized benefits and limitations. (Author-generated graphic)

As demonstrated in Figure 2, LUSVs would operate at distances where the manned ship can provide mutual support and respond if needed. This might include periods within the visible horizon but also episodic surges well over the horizon for specific missions. From a lethality perspective, the additional VLS cells and sensors (in the Medium Unmanned Surface Vehicle) offer enhanced battlespace awareness and depth of fire than is available with a single ship. While others have argued for pushing attritable USVs far forward towards threats, treating every manned ship as a SAG with its LUSVs in escort will address many of the issues highlighted by leaders, including Congressional representatives.

Concerning reliability and maintenance, the Navy has based LUSV prototypes on existing commercial ship designs while conducting further land and sea-based testing and validating its critical technologies and subsystems. While designed to operate for extended periods without intervention, the Unmanned Expeditionary Detachment will be able to support emergent repair or troubleshooting if necessary.

For concerns of autonomy or ethical use of weapons from unmanned units, LUSVs will rely on human-in-the-loop (HITL) for command and control of weapons employment decisions. Therefore an on-scene commander simplifies network and communications requirements between the manned fleet and its LUSV escorts. Others have also argued for unmanned systems to be attritable, and to be sure, it would be preferable to lose an LUSV to a manned ship. However, these will still be multi-million dollar combatants with exquisite technology that should not fall into an adversary’s hands – much in the same way how Fifth Fleet dealt with Iranian attempts to capture a US Saildrone in 2022. Having a local manned combatant nearby will support kinetic and non-kinetic force protection of the LUSV, regardless of the theater or threat.

USVs Ranger and Nomad unmanned vessels underway in the Pacific Ocean near the Channel Islands on July 3, 2021. (US Navy Photo)

Finally, treating an LUSV as a force multiplier with a certain number of VLS cells is in line with previous arguments to count the fleet via means other than ship hulls, and simplifies the LUSV’s deterrent value as just another ship that delivers a specific capability at a discount, just as other manned ships do.

Sequencing and Scaling “Every Ship a SAG”

No vision for USV integration into the Surface Force would be complete without considering how these systems would fit into the career pipeline of current and future Surface Warfare Officers and their enlisted teams. In an “Every Ship a SAG” model, LUSV ships would start as individual early commands for post-Division Officer Lieutenants, whereas multiple LUSVs would be organized into a Squadron, led by a post-Department Head Early Command Officer. The Surface Community executed this model with its Mark VI Patrol Craft before their recent retirement, and similarly these squadrons would be organized under the nascent USV Divisions, who have a direct line to the experimentation and tactical development done by the Surface and Mine Warfighting Development Center (SMWDC), and specifically for unmanned systems, in Surface Development Squadron One (SURFDEVRON).

Cmdr. Jeremiah Daley, commanding officer, Unmanned Surface Vehicle Division One, Secretary of Defense Lloyd J. Austin III, and Capt. Shea Thompson, commodore, Surface Development Squadron One, tour USV Sea Hunter at Naval Station Point Loma, California, (Sept. 28, 2022, DOD photo by Chad J. McNeeley)

The surface community is leading the charge towards a hybrid fleet by advancing USV operational concepts and integrating unmanned experience into a hybrid career path. The first salvo in this career movement was launched in 2021, with the establishment of the Unmanned Early Command positions, but scaling this hybrid model is both critical and beneficial. The community will only benefit from commanding officers with expertise and insights in employing a hybrid surface fleet. As pipelines are clarified and unmanned opportunities grow, officers would transition from one expeditionary tour leading a detachment controlling and maintaining an LUSV, back into Division Officer, Department Head, Executive, and Commanding Officer roles in traditional at-sea commands directing the employment of the same LUSVs. Just as the SWO Nuke community develops expertise in both conventional and nuclear fields at each level of at-sea tours, a future hybrid fleet necessitates competencies in fields like robotics, engineering, applied mathematics, physics, computer science, and cyber.

Lastly, SWO professional experiences and investments in training and education for the use of unmanned systems would further Navy and Department of Defense objectives around Artificial Intelligence, Big Data, and Digital Transformation. With unmanned systems, deploying new HM&E or weapons payloads may be a simpler task compared to accelerating fleet data collection and its subsequent use in software development and delivery. Task Force 59 explicitly linked these issues as the Fifth Fleet Unmanned and Artificial Intelligence Task Force.

“Every Ship a SAG” on a Digital Ocean

Some may question whether “Every Ship a SAG” aligns with the already successful work of Task Force 59, directed by Vice Admiral Brad Cooper, Commander, Naval Forces Central Command, and Captain Michael Brasseur, the Task Force’s Commodore. Captain Brasseur has long advocated for increased AI and Unmanned Integration into the Navy, going back to his time as Co-Founder and first Director of NATO’s Maritime Unmanned Systems Innovation and Coordination Cell (MUSIC^2). He convincingly argued for a “Digital Ocean” Concept where drones:

“Propelled by wind, wave, and solar energy… carry  sensors that can collect data critical to unlocking the untapped potential of the ocean…. [to] exploit enormous swaths of data with artificial intelligence- enhanced tools to predict weather patterns, get early warning of appearing changes and risks, ensure the free flow of trade, and keep a close eye on migration patterns and a potential adversary’s ships and submarines.”

Vice Adm. Brad Cooper, left, commander of U.S. Naval Forces Central Command, U.S. 5th Fleet and Combined Maritime Forces, shakes hands with Capt. Michael D. Brasseur, the first commodore of Task Force (TF 59) during a commissioning ceremony for TF 59 onboard Naval Support Activity Bahrain, Sept. 9. TF 59 is the first U.S. Navy task force of its kind, designed to rapidly integrate unmanned systems and artificial intelligence with maritime operations in the U.S. 5th Fleet area of operations. (Photo by Mass Communication Specialist 2nd Class Dawson Roth)

Captain Brasseur has implemented his prudent and innovative vision in the Fifth Fleet Area of Responsibility. Task Force 59 is a success whose model is likely to be adopted in other theaters. Rather than conflict with the “Digital Ocean” model, “Every Ship a SAG” complements this work in line with missions of the US Navy as Congressman Mike Gallagher recently updated and codified in the 2023 National Defense Authorization Act. The Wisconsin Representative edited the Title 10 mission of the Navy such that the service “shall be organized, trained, and equipped for the peacetime promotion of the national security interests and prosperity of the United States and prompt and sustained combat incident to operations at sea.” In short: a “Digital Ocean” and all it enables serves the peacetime promotion of American national security interests and prosperity, especially in coordination with our allies and partners.

“Every Ship a SAG” postures the Navy for prompt and sustained combat operations incident to the sea. Both missions have been a part of the U.S. Navy since its inception, and both visions are applicable as unmanned ships enter our fleets. Further, LUSVs retain additional utility below the level of armed conflict. To support UOC training, experimentation, and manned ship certifications, LUSVs would serve as simulated opposition forces during high-end exercises, reducing demand on manned sustainment forces, or enabling higher-end threat presentations. Precisely in these scenarios are the venues whereby the fleet can integrate new systems and networks while bridging toward operational concepts for unmanned systems as LUSVs earn increased confidence. In the interim and foreseeable future, however, “Every Ship a SAG” remains the scalable, flexible model for deployed LUSVs within current fleet operations. 

Sober Acknowledgement of Critical Pillars

Unmanned ships and various other transformational technologies are not a panacea for the current and future threats facing the US Navy. Even the promises and methodologies proposed here rely upon critical readiness pillars, each of which could warrant deep individual examinations but are worth mentioning.

Even if the US Navy built a certain number of LUSVs to replace lost VLS capacity, failure to resource them or manage them effectively would still likely doom the program. The fleet must understand and plan for the “total cost of ownership” of a hybrid fleet. These units will still require manpower at various levels and a maintenance infrastructure to sustain them in fleet concentration areas. Nor can the fleet avoid at-sea time to test, integrate, and experiment with these systems, much in the same way that RADM Wayne E. Meyer emphasized, “build a little, test a little, learn a lot,” with the success of the Aegis Weapons System. The Navy has made efforts to assuage Congressional concerns about reliability through investment in land-based testing. Yet the Surface Navy will need continued, reliable resourcing to continue that testing afloat while integrating LUSVs with traditional forces and experimenting with future concepts.

Characterizing those costs are beyond what is available in open-source, but wide-ranging demand for talent is imposing costs across the public and private sectors. Similarly dire is the state of munitions, as highlighted at the Surface Navy Association National Symposium by Commander, Fleet Forces Command, Admiral Caudle who “noted that [even] if the Navy had ready its 75 mission-capable ships, ‘their magazines wouldn’t all be full.’” Put simply: no amount of LUSVs built at economic costs will be worth anything if they lack the appropriate weapons to place in their launchers.

Lastly, the adaption of agile practices to implement better software, data, AI models, etc., is critical for the fleet to field increasingly capable and autonomous USVs. The Department of Defense and the Navy have made various investments in this direction. These include but are not limited to the Program Executive Office for Integrated Warfare Systems (PEO IWS) “The Forge” working to accelerate ship combat system modernizations and development of the Integrated Combat System; to the Naval Postgraduate School’s new Office of Research and Innovation, to the type-command AI Task Forces. Each is working to provide value across various programs in the digital space. Resourcing, integration, and acceleration of those efforts are crucial.

Figure 3: Proposed priority pillars for success for the LUSV program, paired with a collection of Wayne Hughes’ Cornerstones of Naval Operations from Fleet Tactics and a posthumous article.

Individually, each pillar is a wicked problem, but we must take a sober look at those requirements while examining the same realities in the maritime industrial base. The reality appears that little can be done in the near term to accelerate new ship deliveries of complex multi-mission combatants built in Bath, Maine, and Pascagoula, Mississippi. At present, Fincantieri Marine in Wisconsin is the sole yard for FFG-62, while the remaining large shipyards pursue some collection of ESBs, littoral connectors, and generally, more multi-mission units. Fundamentally, a ship like LUSV is the only near-team option to accelerate a pre-war ship buildup given the PLAN’s construction speed.

As the world’s only Navy with a near-term plan and resourcing to meet and exceed 355 ships, the PLAN along with its fellow services has delivered longer-range weapons at greater capacities than the United States for years. By all available open-source data, the US Navy is falling behind the PLAN in the marathon of naval power while the PLAN accelerates toward future advantages.

Figure 4: Comparison of U.S. to PLAN fleet count totals, based on Congressional Research Service reporting on Chinese Military Modernization since 2005.i

Naval writers and thinkers can parse arguments about quantity versus quality, what the right metric is to assess fleet strength, or whether in a joint, Navy vs. Anti-Navy fight, a pure-maritime comparison is warranted. These are valuable discussions. Regardless, the US Navy’s Surface Forces onboard strike and anti-surface warfare capacities will continue to shrink in the near-term while Chinese threats accelerate. Furthermore, the Chinese industrial base capacity far exceeds American capacity at present. The relationship between US Navy leaders and industry could be described as frosty at best, with recent comments from the Chief of Naval Operations to industry including statements to “Pick up the pace… and prove [you have extra capacity]” and from the Commander of Fleet Forces Command stating that he is “not forgiving” industry’s delays.

Given the long-term buys of multi-mission combatants, national shipyards appear unlikely to generate increased efficiencies, accelerated timelines, or better-quality ships if they continue to build only the multi-billion dollar multi-mission combatants they have previously built. Accelerating LUSV procurement across the six shipyards solicited for LUSV concepts would provide increased capital and demand signal for the shipbuilding industry while providing complementary capabilities to the fleet. Yet while the LUSV can and should be a domestic program for growth, corvette-sized unmanned ships with VLS could easily fall into cooperative build plans with the various allies and partners who have frigate-sized, VLS-equipped combatants. The Australia-United Kingdom-United States (AUKUS) technology-sharing agreement could provide an additional avenue for foreign construction. Further US coordination with Japan and South Korea could also prove fruitful, as the two East Asian allies represent the second and third largest global commercial shipbuilders  behind China.

While refining broader LUSV programs, it is worth considering the differences in shipbuilding costs between choosing LUSVs in a SAG compared to traditional manned combatants. Figure 5 provides a table of notional Surface Action Groups based on the fleet of today through 2027, while Figure 6 presents a table with the future ship programs and their costs.

Figure 5: Hypothetical future SAG LUSV force packages and VLS comparisons with current fleet combatants.
Figure 6: Hypothetical future SAG LUSV force packages and VLS comparisons with future fleet combatants.

Congressional Budget Office estimates for future programs like SSN(X) and DDG(X) present stark realities. The next-generation programs could run costs up to $6.3 billion and $3.3 billion, respectively. By comparison, if the Surface Navy chose to pursue an expanded LUSV buy to recapitalize the 788 VLS cells planned to disappear through 2027, this would require 25 32-cell LUSVs, totaling 800 cells. At $241 million per LUSV, the total (shipbuilding-only) costs would be $6.025 billion, or approximately less than a single SSN(X) or two DDG(X)s. While LUSV has a reduced collection of mission sets by comparison to future submarines and destroyers, it remains a ship that can conceivably be built in at least six American shipyards. Further, future LUSVs purpose-built to support Conventional Prompt Strike (CPS) could hypothetically resolve the issue of the margin of the DDG-51 hull form being “maxed out” in space, weight, air, power, and cooling. Rather than a future large surface combatant required to have each capability resident in a single hull, as in DDG(X), a CPS LUSV in escort with a Flight III DDG may represent a proven ship design and better value, that other companies are attempting to support.

Ultimately, there are myriad ways to frame budgetary realities, but LUSV is the only cost-effective method for the surface force to quickly scale VLS capacity within existing force structure and given the present maritime industrial base.

Conclusion

The Surface Navy has a crucial opportunity to strengthen its capabilities and enhance its readiness by building and deploying LUSVs at scale. The “Every Ship a SAG” concept remains rooted in the intellectual work going back nearly a decade to “Distributed Lethality,” “Hunter-killer SAGs,” and their incorporation into Distributed Maritime Operations – only now with unmanned combatants. This manned-unmanned model provides a feasible solution for incorporating unmanned systems into the Surface Warfare Officer career path and forming more lethal Surface Action Groups for the future fight.

“Every Ship a SAG” addresses the concerns raised about Navy USV concepts and presents a clear vision for the future of wartime maritime operations. As the global security situation continues to evolve, the Surface Navy must take decisive action and invest in LUSVs to ensure it is prepared to meet its warfighting mission. It is time for Congress to fully support this effort by providing the necessary resources to bring the “Every Ship a SAG” model to life. Act now and make every ship a Surface Action Group.

Lieutenant Kyle Cregge is a U.S. Navy Surface Warfare Officer. He is the Prospective Operations Officer for USS PINCKNEY (DDG 91). The views and opinions expressed are those of the author and do not necessarily state or reflect those of the United States Government or the Department of Defense.

References

i. O’Rourke, Ronald. “China Naval Modernization: Implications for U.S. Navy Capabilities—Background and Issues for Congress.” December 1, 2022.

ii. O’Rourke, Ronald. “Navy DDG-51 and DDG-1000 Destroyer Programs: Background and Issues for Congress.” 2011. Pages 6, 12, and 25. Average Costs for New Flight IIA Destroyers based on averaging multi-year procurement of DDGs 114-116, coming to $1,847 Million per ship.

iii. O’Rourke, Ronald. “Navy DDG-51 and DDG-1000 Destroyer Programs: Background and Issues for Congress.” 2022. Page 25. Table A-1. Per ship cost determined based on “Estimated Combined Procurement Cost of DDGs 1000, 1001, and 1002” in millions as shown in annual Navy budget submissions, using the FY23 Budget submission dividing the three ships’ cost by three.

iv. O’Rourke, Ronald. “Navy LPD-17 Flight II and LHA Amphibious Ship Programs: Background and Issues for Congress”. 2022. Pages 1 and 6. AND https://www.navy.mil/Resources/Fact-Files/Display-FactFiles/Article/2169795/aircraft-carriers-cvn/

v. O’Rourke, Ronald. “Navy Virginia (SSN-774) Class Attack Submarine Procurement: Background and Issues for Congress” 2021. https://www.documentcloud.org/documents/20971801-rl32418-12 Page 9.

vi. O’Rourke, Ronald. “Navy Large Unmanned Surface and Undersea Vehicles: Background and Issues for Congress.” 2022. Page 9.

vii. Congressional Budget Office. “An Analysis of the Navy’s Fiscal Year 2023 Shipbuilding Plan”. 2022. https://www.cbo.gov/publication/58447 Table 7, “Average Costs per Ship Over the 2023–2052 Period for Flight III DDG”.

viii. Ibid, for FFG-62 Frigates.

ix. O’Rourke, Ronald. “Navy Constellation (FFG-62) Class Frigate Program: Background and Issues for Congress”. 2021. Congressional Research Service.  https://sgp.fas.org/crs/weapons/R44972.pdf

x. CBO. Navy FY23 Shipbuilding Plan Analysis. Table 7. “Average Costs” DDG(X).

xi. Ibid. “Average Costs”. LPD(X), LHA-6, CVN-78.

xii. O’Rourke, Ronald. “Navy Virginia (SSN-774) Class Attack Submarine Procurement: Background and Issues for Congress” 2021. https://www.documentcloud.org/documents/20971801-rl32418-12 Page 9.

xiii. O’Rourke, Ronald. “Navy Large Unmanned Surface and Undersea Vehicles: Background and Issues for Congress.” 2022. Page 9.

xiv. O’Rourke, Ronald. “Navy DDG(X) Next-Generation Destroyer Program: Background and Issues for Congress” 2022. Page 2.

Featured Image: The guided missile destroyers USS Mustin (DDG 89), foreground, and USS Curtis Wilbur (DDG 54) steam through the Philippine Sea during a replenishment at sea Sept. 18, 2013. (U.S. Navy photo by Mass Communication Specialist 3rd Class Paul Kelly/Released)