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Europe

Russia’s Strategic Brown Water Capabilities: A NATO Blind Spot?

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By Helge Adrians

Russia is working to integrate inland waterways more deeply into its deterrence and defense posture. In Western contexts, this area of maritime geography is usually termed the ‘brown water zone.’ A harbinger of that development was the October 2015 strike against positions of Islamist groups in Syria, carried out by small warships in the Caspian Sea using land-attack cruise missiles (LACMs). Russia not only demonstrated a new level of operational reach (of over1 1,500 kilometers), but also revealed a singular capability that remains unmatched to this day – executing deep precision strikes (DPS) from inland waters.2

Indications that the Russian Navy could carry out such an operation from lakes and possibly even rivers had emerged a few years prior. As part of the State Armaments Program for 2007-2015, Russia started outfitting many of its naval vessels with a new, long-awaited universal vertical launch system (VLS). Like the US MK 41 VLS — which has been in use since 1986— the Russian 3S14 VLS is designed to accommodate different types of missiles (rather than using specialized tubes for each missile type, as was previously the case on Soviet and Russian warships)3. The outfitting included river-capable Buyan-class corvettes, of which a modified batch with an eight-cell VLS was built from 2010—the Buyan-M class, sometimes also called Sviyazhsk-class.4 Two years later, the 3M14 LACM—a variant of the Kalibr family of missiles—was introduced on surface warships. One of the first units was the Gepard-class frigate Dagestan, which is part of the Caspian Flotilla. The formation also received the first three Buyan-M class corvettes, commissioned in 2013.

The reinforcement of the Caspian Flotilla was no coincidence. It was closely linked to the naval build-up of the three former Soviet republics Azerbaijan, Kazakhstan, and Turkmenistan from the mid-2000s. The motivations behind this trend were twofold – a growing interest amongst the littoral states in exploiting the Caspian Sea’s economic potential, and the ambiguity surrounding its legal status at that time, particularly concerning maritime borders and access rights. Despite its scale resembling a marginal sea, the Caspian Sea is in practical terms an inland lake.5

Russia’s military port of Kaspiysk on the Caspian Sea. (Google Earth image via TWZ.com)

Although Western observers were aware of these two developments — ‘Kalibrization’ of the Russian Fleet and strengthening the combat power of forces of an inland water body — it seems they failed to derive the correct insights. For example, the Intermediate-Range Nuclear Forces (INF) Treaty, concluded with the United States in 1987, prohibited land-based medium-range missiles, but not sea-based ones. This explains why Russia’s strike in October 2015 caused such significant surprise. As is often the case with such events, many of the subsequent analyses focused on the political implications and the technologies used, while paying less attention to the underlying conceptual framework.

New strategic importance of Russia’s inland waters

Russia’s inland waterways hold strategic significance. This is due to three reasons: first, the country has a large number of rivers spread across its entire territory; second, many of them are long and wide, well-suited for transporting cargo; and third, most of the rivers lie entirely within Russian borders, making them less accessible to Western intelligence. That may have been one of the reasons why the Soviet Union connected the waters west of the Urals in the mid-20th century. At the center is the Volga River, which flows into the Caspian Sea. Through the construction of canals, the Volga was also linked to the Baltic Sea and the White Sea in the North, and to the Black Sea in the South.6 This network is most commonly referred to as the Unified Deep Water System of European Russia (UDWS).

Map of the United Deep Waterway System of Russia. (Graphic via Wikimedia Commons)

From the earliest days of the Cold War, there were discussions within NATO about the military utilization of the UDWS. However, this was more about the possibility of moving single warships, especially submarines, between the northern and the southern flank covertly and thus protected from NATO attacks. To this day, Russia maintains naval shipbuilding at several shipyards along the Volga River. Until the 1990s, even Kilo-class submarines were constructed at a facility there.

Fitting river-capable corvettes with 3M14 LACMs and using them from the Caspian Sea has fundamentally altered strategic assessments of the UDWS, from a useful logistical corridor to an inland naval bastion. However, the capability to carry out DPS from such an unexpected location seems less the outcome of deliberate planning. It was more a consequence of budgetary limitations as a result of the collapse of the Soviet Union in 1991 and the Russian financial crisis in 1998.7 Faced with the need to maintain its nuclear-powered ballistic missile submarines (SSBNs), Russia was forced to make cuts in surface fleet development. Enhancing the operational reach of so-called third-rank combatants like corvettes, traditionally used for operations in the littoral ‘green water,’ or as they say in the Russian Navy – ‘near sea’ zone – emerged as a pragmatic and creative compromise, particularly against the backdrop of the INF Treaty, which was in effect until 2019.8,9 Amongst these are the aforementioned Buyan-M class and its more advanced successor, the Karakurt-class, of which several examples have been commissioned since 2018. 

Searching for safe spaces

Following Russia’s full-scale invasion of Ukraine in February 2022, naval platforms became part of the ground campaign through the use of 3M14 LACMs. Initially, such strikes were launched from the Black Sea. By end of December 2022, the Caspian Sea—far away from the frontlines—had also become a launch area for these operations. As Ukraine gradually managed to keep the Black Sea Fleet at distance through a combination of shore-based anti-ship missiles, sea mines, and later—with growing intensity since summer 2023 at the latest—uncrewed surface vessels (USVs), the strategic relevance of the Caspian Sea grew. It not only served as a safe space for continued DPS but also as a hub for repairing and replacing damaged ships.

The expanded use of uncrewed systems in the war against Ukraine plus Western intentions to acquire such platforms have made secure maritime areas increasingly vital for the Russian Navy. However, those are scarce. During the Cold War, Soviet fleets relied on an ‘area denial’-strategy (AD),10 also known as the ‘Bastion’-concept with regard to the defense of the bases of the Northern and the Pacific Fleet where Russia continues to concentrate its SSBNs. The extended defense of this protected space can be described as an ‘anti-access’-approach (A2). Long before the term ‘A2/AD’ was coined by Western analysts in 2003 and became a buzz word from 2014, Moscow had already developed the necessary capabilities as a lesson learnt from World War II (mainly a large long-range aviation and submarine force).11,12 These platforms threatened opposing surface warships, which could be detected and targeted before reaching Soviet positions. Even fleets in marginal seas were enabled to perform A2/AD. A renaissance came with the introduction of various land-based long-range missile systems from around 2012.13 For a long time, Western nations appeared to have little means to counter these A2/AD capabilities. Unmanned systems may offer a solution, as the Ukrainian armed forces have repeatedly demonstrated in the air and in the maritime domain. Due to their small size and design, uncrewed systems have low signatures. Consequently, they are frequently able to penetrate Russian defense layers unrecognized. As a result, the retreat of warships into protected areas under full Russian control—including the UDWS—appears to be the only viable option to safeguard against new asymmetric threats such as USVs and uncrewed underwater vehicles (UUVs).

In light of this, the Russian Navy has adapted for better protection, starting with the creation of a new naval district for the Sea of Azov in July 2023. Situated north of the Black Sea, it is a shallow shelf sea accessible primarily via the Kerch Strait, which Russia has controlled since annexing Crimea in March 2014. In the early stages of the invasion of Ukraine in 2022, Russian forces succeeded in closing the gap between Donbas and Crimea. Since then, Russia has gained full control over the Sea of Azov. One of the main reasons for this approach may have been that there is access to the UDWS via the Don River, which flows into the north-west. In the Sea of Azov, Russian warships are less exposed to Ukrainian attacks than in the Black Sea. This made the maritime enclave appear suitable, amongst other things, as a launch area for corvettes with LACMs.

Efforts to identify secure maritime spaces were also observed in other regions: in the east of the Baltic Sea, the Russian Navy appears to be planning to open up Lake Ladoga—situated north of St. Petersburg—as a fallback area for small warships. Covering nearly 18,000 square kilometers, it is the largest inland body of water in Europe. Since Finland’s defeat in the Second World War, it has been completely surrounded by Russian territory14 and became part of the UDWS. During the Cold War, the lake’s remoteness made it a strategically valuable site for naval testing, playing a role comparable to that of the Caspian Sea. Now, according to Russian media, it is set to become a component of Moscow’s deterrence and defense posture vis-à-vis NATO. For this, two Karakurt-class corvettes of the Baltic Fleet were deployed to Lake Ladoga for several days in September 2023, followed by two Buyan-M class vessels for a similar duration in September 2024.15 While in the first year the focus lay on navigation training and surveying former naval mooring sites repurposed by Russian state-owned defense companies, the second year was reportedly marked by notional launches of 3M14 LACMs as part of the major naval exercise Okean 2024.16

In Russian media, there have been discussions about bolstering forces for brown water operations. This was sparked by a March 2024 announcement from the then Russian Minister of Defense, stating plans to reconstitute a Dnieper Flotilla by the end of the year—intended to take over riverine combat duties from the ground forces. Such formations have existed intermittently since the 18th century, most recently until 1951. The Soviet Union also operated similar groupings on other major rivers. Russia has taken over some of them. The last major command was the Amur Flotilla at the Russian-Chinese border in the Far East: it was transferred to the Border Service in 1995 and formally disbanded in 1998. Apart from that, a sizable shipyard still exists on the Amur River, which also builds Karakurt-class corvettes. However, it is not yet known to what degree these will be deployed from there and whether Russia intends to build up further riverine units.

Amur River basin. (Graphic via Wikimedia Commons)

Decisive, complementary impact without salvos

The extent to which the Russian Navy attributes a strategic role to inland waters is currently connected to the deployment of Buyan-M and Karakurt-class corvettes. Nevertheless, the presence of these vessels beyond the usual duration of a transit is better understood as a sign that changes might be underway, rather than definitive evidence that a change has already taken place. This is because, although the corvettes can strike far-off targets using 3M14 LACMs, they are limited to carrying just eight per ship. However, in conjunction with long-range and decoy UAVs that could saturate air defenses, these assets enable surgical strikes or DPS, respectively, against select targets, particularly critical infrastructure. This reflects the ‘Strategic Operation for the Destruction of Critically Important Targets’-approach outlined in Russian military theory around 2010. The concept is to discourage an adversary from escalating or continuing a conflict by selectively destroying high-value targets, aiming to impact political or societal morale without causing mass casualties. This behavior has been repeatedly demonstrated in Russia’s war against Ukraine.

Such effects could also be achieved through ground- or air-based systems. In this context, warships should be seen as a supplement — particularly when other assets are absent or limited. One example is the Russian part of Karelia, an area east of Lake Ladoga, where Moscow only recently began expanding its ground force presence in 2024, following Finland’s accession to NATO in 2023, leaving the area initially lacking adequate deterrence capabilities.17 Even though Lake Ladoga is seasonally unusable due to ice cover, it can nonetheless be utilized temporarily for defensive or deterrent purposes.

The potential use of LACMs also serves to demonstrate the Russian Navy’s relevance in land operations—an aspect that should not be underestimated. Here, the focus is less on quantity but more on quality; internally, this reinforces the Navy’s standing within the Russian armed forces and political leadership, while externally, it contributes to strategic ambiguity by signaling that all branches of the military are capable of delivering long-range effects.

Closing NATO’s blindspot

Striking land targets from lakes offers several advantages. In addition to the protection against asymmetric threats, it also provides cover from reconnaissance and targeting by enemy missile systems. This is due to the stealthy design of the Buyan-M and Karakurt-class corvettes. When moving or hiding near shorelines, spotting, tracking, and targeting them becomes difficult. Moreover, engaging warships requires different types of munitions than those used against land-based systems like rocket launchers—specifically, warheads capable of penetrating hulls or superstructures to cause significant damage or achieve a kill. Most Western anti-ship missiles have limited range, typically only a few hundred kilometers, and travel at subsonic speeds over longer distances, making them easier to detect and intercept. Additionally, some anti-ship missiles designed for blue-water targets may struggle with targets amongst the cluttered shorelines of lakes and rivers.

While NATO may not prioritize countering Russian warships on lakes in a broader conflict scenario, the risk remains significant. Ukraine’s response offers a blueprint of what can be done. On the one hand, obstructing passage through chokepoints such as straits or locks can effectively trap warships or prevent them from entering. Since the start of the war, Ukraine has sought to block the Kerch Strait; for example, in July 2024, it targeted the nearby ferry terminal at Kavkaz from the air. According to the Ukrainian Navy, Moscow has withdrawn all warships from the Sea of Azov as a result.

On the other hand, the destruction of port infrastructure can disrupt the resupply of naval forces, particularly the reloading of missiles, which can only be done pier-side. Ukraine successfully struck Russian warships in the captured port of Berdiansk on the Sea of Azov in March 2022 as well as in the naval base at Kaspiysk on the Caspian Sea in November 2024. In the latter, both Gepard-class frigates and a Buyan-M class corvette would have been affected.

Ukrainian drones strike the naval base of the Russian Caspian Flotilla in November 2024. (Footage via Twitter/OSINT Technical)

There are also lessons to be learned from Russia’s tactics: in August 2025, it launched an attack on a Ukrainian reconnaissance vessel deep in a tributary of the Danube River. The vessel was reportedly underway in Ukrainian waters, just meters away from the opposite Romanian bank. Remarkably, Russia succeeded in covertly deploying a USV about 40 kilometers into the Danube to conduct the kamikaze strike, while coordinating a UAV to monitor the mission from the air (which could also have fired on the ship).

In principle, it seems possible that the Russian Navy may seek to enhance the strategic role of inland waters. The deployment of Kilo II-class submarines or the loading of 3M14 LACMs in the containerized Club-K version18 onto civilian riverboats are both conceivable, though unlikely due to the logistical complexity involved (because of, for example, river depths19 and currents20 as well as satellite connections). Instead, Russia is more likely to focus on better protecting its Buyan-M and growing Karakurt-class corvettes. Increasing their numbers and distributing them when at sea or over several supporting sites make detection significantly more difficult. This would allow Russia to maintain a strategic reserve for DPS.

Conclusion

NATO should not underestimate Russia’s strategic brown water capabilities. The same applies to Japan and South Korea in the event that Moscow, contrary to current indications, intends to use the Amur as a launch area to defend the Sea of Japan and the Sea of Okhotsk. Therefore, it is essential to prepare doctrinally, enhance surveillance techniques, and develop effective countermeasures. This will require more unconventional thinking—for example, the dropping of sea mines, USVs and UUVs from the air or the arming of partisans with portable anti-ship missiles such as the Swedish RBS-17. New doctrine and capabilities can effectively account for this important yet underappreciated dimension of Russian naval influence.

Commander Helge Adrians, German Navy, M.A., is a Visiting Fellow at the German Institute for International and Security Affairs.

References

1. 3M14 should be able to fly up to 2,500 kilometers, according to [U.S.] State Department, Bureau of Arms Control, Verification and Compliance (2020): 2020 Adherence to and Compliance with Arms Control, Nonproliferation, and Disarmament Agreements and Commitments (Compliance Report), online in: https://2017-2021.state.gov/wp-content/uploads/2020/06/2020-Adherence-to-and-Compliance-with-Arms-Control-Nonproliferation-and-Disarmament-Agreements-and-Commitments-Compliance-Report-1.pdf (PDF file), June 2020 (accessed: 26.12.2024), p. 14 and 16.

2. The distance from the Caspian Sea to the targets in Syria was given by the official Russian side as ‘nearly 1,500 kilometers’, cf. TASS (2015): Caspian Flotilla ships fire 26 cruise missiles on IS targets in Syria — Defense Minister [sic!], online in: https://tass.com/defense/826919, 07.10.2015 (accessed: 18.12.2024).

3. Cf. Bogdanov/Kramnik (2018), p. 6.

4.  Cf. Office of Naval Intelligence (2015): The Russian Navy. Historic Transition, Washington: N.p., p. 20.

5. For decades, the Soviet Union and Iran—the Caspian’s only littoral states until 1991—neglected to define its legal status. Only in 2018 did the five current coastal states reach an initial agreement (i.e., the Convention on the Legal Status of the Caspian Sea, also known as ‘Teheran Convention’), concluding that the Caspian Sea should be treated as neither a sea nor a lake in legal terms.

6. Cf. Jaghdani, Tinoush Jamali/Ketabchy, Mehdi (2023): The Strategic Significance of the Russian Volga River System, in: Russian Analytical Digest, Vol. 304, pp. 22-27, here: p. 22.

7. Cf. Mommsen, Klaus A. R. (2020): The Russian Navy. “Russia’s pride, strength, and asset”, in: Routledge Handbook of Naval Strategy and Security, edited by Krause, Joachim/Bruns, Sebastian (2018), Abingdon/New York: Routledge, pp. 305-314,
here: p. 307.

8. Cf. Kofman, Michael (2023): Evolution of Russian naval strategy, in: The sea in Russian strategy, edited by Monaghan, Andrew/ Connolly, Richard (2023), Manchester: Manchester University Press, pp. 94-123, here: p. 109.

9. For example, the delays in delivering the first two Admiral Grigorovich-class frigates in 2015 prompted a shift in focus toward building Karakurt-class corvettes instead, cf. РИА Новости (2015): Минобороны заявило, что ОПК “немножко сорвал” срок сдачи двух фрегатов, online in: https://ria.ru/20151224/1348076684.html, 24.12.2015 (accessed: 19.08.2025).

10. Cf. Ushirogata, Keitaro (2025 in English; 2019 in Japanese): Global Maritime Military Strategy. 1980-2023, Singapore: Springer, p. 128 ff.

11. This was related to the fact that the US developed a new strategy to deprive Chinese A2/AD-capabilities. Russia and Iran were also credited with such capabilities, making the issue more relevant for European NATO members, especially as there were fears after the occupation and annexation of Crimea that Russia could do the same with the Baltic states and make defence more difficult by activating A2/AD-systems, cf. Simón, Luis (2016): A European Perspective on Anti-Access/Area Denial and the Third Offset Strategy, online in: https://warontherocks.com/2016/05/a-european-perspective-on-anti-accessarea-denial-and-the-third-offset-strategy/, 03.05.2016 (accessed: 27.08.2025).

12. Cf. Gorschkow, Sergej (1976): Seemacht Sowjetunion, edited by Opitz, Eckardt (1978), Hamburg: Hoffmann & Campe, p. 266.

13. In 2012, the S400 air defence system, which entered service in 2007, was stationed in Kaliningrad—the first of the three missile systems primarily linked to A2/AD, cf. Dalsjö, Robert/Berglund, Christofer/Jonsson, Michael (2019): Bursting the Bubble. Russian A2/AD in the Baltic Sea Region. Capabilities, Countermeasures, and Implications (FOI-R–4651–SE), p. 27. The other two systems are Iskander (both the -M and -K version) against land targets, and Bastion-P against sea targets, cf. ibid., p. 10.

14. In late 1939, the Soviet Union demanded territory from Finland, citing the security of Leningrad (now Saint Petersburg) as a primary justification. After Finland refused, the Soviet Union invaded in November. The war ended in March 1940 with the Moscow Peace Treaty and the formerly shared Lake Ladoga became entirely surrounded by Soviet territory. Though contested during the 1941–1944 war, this control held. This outcome was formally recognized in 1947 with the Paris Peace Treaty that formally established Lake Ladoga as a Soviet inland lake under international law.

15. It was the Sovetsk (hull number: 252) and the Odintsovo (252), see the report ‘Baltic Fleet on Ladoga’ in: https://vpk.name/en/ 784930_baltic-fleet-on-ladoga.html 16.10.2023 (accessed: 24.11.2024). This is the English translation of the original Russian article by Timur Gainutdinov, published on Krasnaya Zvezda. The original text was published online but is not accessible from within Germany, cf. http://redstar.ru/na-sedoj-ladoge/. However, the Norwegian military blogger Thore Are Iversen uploaded the article and another English translation to X; see corresponding images at https://x.com/The_Lookout_N/status/ 1714640171176493411, 18.10.2023 (accessed: 27.12.2024).

16. One them could be the former naval base Lakhdenpokhya in the north west of the lake, cf. Ryabov, Kirill (2023): “Karakurt” on Lake Ladoga, online in: https://en.topwar.ru/228351-karakurty-na-ladozhskom-ozere.html, 19.10.2023 (accessed: 24.11.2024). Otherwise, the corvettes were moored at the floating bridge in Priozersk, as satellite images showed, see the Tweet by Thore Are Iversen in: https://x.com/The_Lookout_N/status/1833800057469952169, 11.09.2024 (accessed: 28.12.2024).

17. It was only in April 2024 that Russia announced its intention to station three missile artillery battalions equipped with the Iskander-M system in Karelia, see report ‘В Карелии сформирована отдельная ракетная бригада с ОТК «Искандер-М»0‘, in: https://iz.ru/1684603/2024-04-19/v-karelii-sformirovana-otdelnaia-raketnaia-brigada-s-otk-iskander-m, 19.04.2024 (accessed: 12.01.2025).

18. However, ‘[t]he current status of the Club-K system is unclear, and there is no public evidence that russia [sic!] has commenced serial production of this system’, cf. Syngaivska, Sofiia (2024): New Icebreaker Showcases russia’s [sic!] Advanced Naval Technology, Allegedly Suitable for the Kalibr Missiles, online in: https://en.defence-ua.com/weapon_and_tech/new_icebreaker_ showcases_russias_advanced_naval_technology_allegedly_suitable_for_the_kalibr_missiles-10743.html, 05.06.2024 (accessed: 26.08.2025).

19. Kilo-class submarines were usually deployed on barges across rivers, see the following undated photo in https://imgur.com/a/ lYRJeAO, 12.12.2023 (accessed: 04.01.2025). The link was shared in a discussion on Reddit, see https://www.reddit.com/r/ submarines/comments/18g02tl/how_submarines_built_in_nizhny_novgorod_were/, n.d. (presumably 2024; accessed: 04.01.2025). In 2021, a decommissioned November-class nuclear submarine was even transported via the White Sea-Baltic Sea Canal, see https://paluba.media/news/11667, 21.09.2021 (accessed: 16.01.2025).

20. Even smaller warships are therefore accompanied by tugs, as can be seen in a video showing the Karakurt-class corvette Taifun (805) on its way to Lake Ladoga in 2019, see https://www.youtube.com/watch?v=jZ7uYoh-hXg&t=1s, 20.05.2019 (accessed: 03.01.2025).

Featured Image: Buyan-M-class corvette of the Russian fleet, December 2022. Russia. (Photo via Ministry of Defense of the Russian Federation)

Capability Analysis, Drones

What’s the Buzz? Ship-Based Unmanned Aviation and its Influence on Littoral Navies during Combat Operations

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By Ben Ho Wan Beng

Introduction

“Unmanned aviation” has been a buzzword in the airpower community during recent years with the growing prevalence of unmanned systems to complement and in some cases replace peopled ones in key roles like intelligence, surveillance and reconnaissance (ISR). Insofar as unmanned aerial vehicles (UAVs) are increasingly used for strike, their dominant mission is still ISR because of the fledging state of pilotless technology. This is especially the case for sea-based drones, which are generally less capable than their brethren ashore. That said, several littoral navies have jumped on the shipborne UAV bandwagon owing to its relative utility and cost-effectiveness.[1] And with access to such platforms, how would these entities be affected during combat?

For littoral nations without an aerial maritime ISR capability in the form of maritime patrol aircraft (or only having a limited MPA capability), the sea-based drone can make up for this lacuna and improve battlespace/domain awareness. On the other hand, for littoral nations with a decent maritime ISR capability, the shipborne UAV can still play a valuable, albeit, complementary role. The naval drone also offers the prospect of coastal forces amassing more lethality as it refines the target-acquisition process, enabling its mother ship to attack the adversary more accurately.

The Littoral Combat Environment

Littoral operations are likely to be highly complex affairs. As esteemed naval commentator Geoffrey Till said: “The littoral is a congested place, full of neutral and allied shipping, oil-rigs, buoys, coastline clutter, islands, reefs and shallows, and complicated underwater profiles.”[2] One key reason behind the labyrinthine nature of littoral warfare is that it involves clutter not only at sea, but also on land and in the air. Especially troublesome is the presence of numerous ships in the littorals. To illustrate, almost 78,000 ships transited the Malacca Strait, one of the world’s busiest waterways, in 2013.[3]

Such a complex operating milieu would place a premium on the importance of battlespace awareness, which could make or break a campaign. As fabled ancient Chinese military philosopher Sun Tzu asserted: “With advance information, costly mistakes can be avoided, destruction averted, and the way to lasting victory made clear.” This statement was made over 2,000 years ago and is still as relevant today, especially when considered against the intricacies of littoral combat that hinder sensor usage. Indeed, shipborne radar performance during littoral operations can be significantly degraded by land clutter. For instance, the 1982 Falklands conflict manifested the problems sea-based sensors had in detecting and identifying low-flying aircraft with land clutter in the background.[4] Campaigning in congested coastal waters would also necessitate the detection and identification of hostile units in the midst of numerous other sea craft, which is by no means an easy task. All in all, the clutter common to littoral operations presents a confusing tactical picture to naval commanders, and the side with a better view of the situation ­– read greater battlespace awareness – would have a distinct edge over its adversary. Sea-based UAVs can provide multispectral disambiguation of threat contacts from commercial shipping by virtue of onboard sensor suites, yielding enhanced situational awareness to the warfare commander.

Improved Battlespace Awareness         

Traditional manned maritime patrol aircraft (MPA) would be the platform of choice to perform maritime ISR that helps in raising battlespace awareness in a littoral campaign. However, not all coastal states own such assets, which can be relatively expensive[5], or have enough of them to maintain persistent ISR over the battlespace, a condition critical to the outcome of a littoral operation. This is where the sea-based drone would come in handy. Unmanned aviation has a distinct advantage over its manned equivalent, as UAVs can stay airborne much longer than piloted aircraft. To illustrate, the ScanEagle naval drone, which is in service with littoral navies such as Singapore and Tunisia and commonly used for ISR, can remain on station for some 28 hours.[6] In stark contrast, the corresponding figure for the P-3 Orion MPA is 14 hours.[7] The sensor capabilities of some of the naval drones currently in service make them credible aerial maritime ISR platforms. Indeed, they are equipped with sophisticated technologies such as electro-optical and infrared sensors, as well as synthetic aperture radar (SAR) systems.

To be sure, the shipborne UAV is incomparable to the MPA vis-à-vis most performance attributes, and the two platforms definitely cannot be used interchangeably. The utility of the naval drone lies in the fact that it can complement the MPA by taking over some of the latter’s routine, less demanding surveillance duties. This would then free up the MPA to concentrate on other, more combat-intensive missions during a littoral campaign, such as attacking enemy ships. And for a littoral nation without MPAs, the shipborne UAV would be especially valuable as it can perform aerial ISR duties for a prolonged period.

The naval drone can contribute to information dominance in another way. In combat involving two littoral navies, the side with organic airpower tends to have better domain awareness over the other, ceteris paribus. However rudimentary it may be, the shipborne drone constitutes a form of organic sea-based airpower that extends the “eyes” of its mother platform. The curvature of the Earth limits the range of surface radars, but having an “eye in the sky” circumvents this and improves coverage significantly. Being able to “see” from altitude allows one to attain the naval equivalent of “high ground,” that key advantage so prized by land-based  forces. Indeed, the ScanEagle can operate at an altitude of almost 5,000 meters.[8] In the same vein, the Picador unmanned helicopter has a not inconsiderable service ceiling of over 3,600m.[9] In essence, the UAV allows its mother ship to detect threats that the latter would generally be unable to using its own sensors.

All in all, shipborne drones enable littoral fleets to have a clearer tactical picture, translating into improved survivability by virtue of the greater cognizance of emerging threats that they offer to surface platforms. Having greater battlespace awareness also means that the naval force in question would be in a superior position to dish out punishment on its adversary.

Increased Lethality

Sea-based UAVs would enable a littoral navy to target the opposing side more accurately as they can carry out target acquisition, hence increasing their side’s lethality. In this sense, the drone is reprising the role carried out by floatplanes deployed on battleships and cruisers in World War Two. During that conflict, these catapult-launched aircraft acted as spotters by directing fire for their mother ships during surface engagements. In more recent times, during Operation Desert Storm, Pioneer UAVs from the American battleship Wisconsin guided gunfire for their mother ship. Several current UAVs can fulfill this role. For instance, the Eagle Eye can be used as a guidance system for naval gunfire; ditto the Picador with its target-acquisition capabilities. There is also talk of drones carrying out over-the-horizon targeting so as to facilitate anti-ship missile strikes from the mother platforms.[10]

Though land-based UAVs are increasingly taking up strike missions, the same cannot be said for their sea-based counterparts as very few of the latter are even in service today in the first place due to their complexity and cost. The Fire Scout is one such armed naval UAV. This United States Navy rotorcraft can be armed with guided rockets and Hellfire air-to-surface missiles; however, with a unit cost of US$15-24 million[11], it is not a low-end platform. All in all, unarmed shipborne drones are likely to be the order of the day for littoral navies, at least in the near term, and such platforms can only carry out what they have been doing all this while, tasks like ISR and target acquisition.

Conclusion

In summary, the sea-based drone can, to some extent, complement the maritime patrol aircraft in the aerial ISR portfolio at sea by helping to maintain battlespace awareness for the littoral navy during a conflict. The naval UAV’s target-acquisition capability also means that it can improve its owner’s striking power to some extent. These statements, however, must be qualified as current shipborne drones can only operate in low-threat environments – in contested airspace, their survivability and viability would be severely jeopardized, as they are simply unable to evade enemy fighters and anti-aircraft fire. In the final analysis, it can perhaps be maintained that the rise of sea-based UAVs constitutes incremental progress for littoral navies, as the platform does not offer game-changing capabilities to these entities.

Going forward, ISR is likely to remain the main mission for sea-based drones in the near future. Though the armed variant seems to offer a breakthrough in this state of affairs, it must be stressed that it is neither a simple nor cheap undertaking. If and when defense industrial players provide lower-cost solutions to this issue in the future, however, the striking power of coastal fleets would increase considerably and with that, the nature of littoral and naval warfare in general would profoundly change. Until then, the sea UAV-littoral navy nexus will be characterized by evolution, not revolution.

Ben Ho Wan Beng is a Senior Analyst with the Military Studies Programme at the S. Rajaratnam School of International Studies in Singapore; he received his master’s degree in strategic studies from the same institute. The ideas expressed above are his alone. He would also like to express his heartfelt gratitude to colleague Chang Jun Yan for his insightful comments on a draft of this article.

This article featured as a part of CIMSEC’s September 2015 topic week, The Future of Naval Aviation. You can access the topic week’s articles here. 

Endnotes

[1] For instance, the Scan Eagle drone has a unit cost of $100,000. See www.nytimes.com/2013/01/25/us/simple-scaneagle-drones-a-boost-for-us-military.html?_r=0.

[2] Geoffrey Till, Seapower: A Guide for the Twenty-first Century (London: Routledge, 2013), 268.

[3] Marcus Hand, “Malacca Straits transits hit all-time high in 2013, pass 2008 peak,” Seatrade Maritime News, February 10, 2014, accessed September 4, 2015, www.seatrade-maritime.com/news/asia/malacca-straits-transits-hit-all-time-high-in-2013-pass-2008-peak.html.

[4] Milan Vego, “On Littoral Warfare,” Naval War College Review 68, No. 2 (Spring 2015): 41.

[5] Some of the more common MPAs include the P-3 Orion, which is in service with nations like New Zealand and Thailand which has a unit cost of US$36 million, according to the U.S. Navy. See www.navy.mil/navydata/fact_display.asp?cid=1100&tid=1400&ct=1.

[6] “ScanEagle, United States of America,” naval-technology.com, accessed September 5, 2015, www.naval-technology.com/projects/scaneagle-uav.

[7] “P-3C Orion Maritime Patrol Aircraft, Canada,” naval-technology.com, accessed September 5, 2015, www.naval-technology.com/projects/p3-orion.

[8] “ScanEagle, United States of America.”

[9] “Picador, Israel,” naval-technology.com, accessed September 5, 2015, www.naval-technology.com/projects/picador-vtol-uav.

[10] Martin Van Creveld, The Age of Airpower (New York: Public Affairs, 2012), 274.

[11] United States Government Accountability Office, Defense Acquisitions: Assessment of Selected Weapons Program, March 2015, 117.

Capability Analysis, Global Analysis, South Pacific/Oceania

An ASEAN Maritime Alliance?

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The year 2014 brought new tensions to the South China Sea, particularly as Chinese authorities sought to establish a series of island-like structures in the midst of the disputed Spratly Islands. Such provocative actions, however, are unlikely to generate sufficient political will among the other countries of the region to establish a Political-Security Community under the auspices of the Association of South East Asian Nations (ASEAN) by the 2015 deadline. But were this collection of ten countries to pool their resources into a security community or even a security alliance, it would be an impressive force and a potential deterrent to aggression in the South China Sea.

In particular, it is worthwhile noting the relative strength of ASEAN coastal defence forces. Some member states, such as Indonesia, possess respectable ‘blue water’ navies, that is to say, they have larger vessels capable of operating in deep waters and engaging in long-range standing battles. Other ASEAN countries, such as the Philippines, have considerable ‘brown water’ navies,  forces consisting of small patrol boats which can cruise inland waterways and the shallow waters that weave between tight-knit island chains. But the varied nature of the waters disputed in the South China Sea particularly requires the flexibility offered by corvettes.

Generally, corvettes fall between the Royal Canadian Navy’s Halifax-class frigates and Kingston-class coastal defence vessels in size. But there is much debate as to what constitutes a contemporary corvette. For example, the Royal Omani Navy calls its Khareef-class vessels ‘corvettes’ even though the displacement of each vessel in the class is approximately 2,660 tons. Recent advancements in shipbuilding have also allowed the US Navy to introduce new vessels with substantial displacement but with shallower drafts, meaning the new USS Liberty can approach closer to coastlines than the similarly sized but older Oliver Hazard Perry-class frigates.

For the purposes of this analysis, only those vessels with a displacement greater than 100 tons but less than 1,700 tons will be considered corvettes. China’s maritime forces, the People’s Liberation Army Navy (PLAN),  has a substantial number of vessels in this range deployed to Hong Kong and a network of naval bases off the South China Sea. 12 Jiangdao-class corvettes (1,440 tons) are the workhorses of this maritime presence in the region and China may possibly add 3 more vessels of this class by the end of 2015. Beyond the Jiangdao-class corvettes, PLAN’s southern presence includes six Houjian-class missile boats (520 tons) and approximately 80 other missile boats and gunboats of various classes and ranging in displacement from 200 to 480 tons each. This vastly exceeds the quantity and quality of vessels any individual Southeast Asian country could bring to bear in a conflict. But ASEAN’s combined maritime forces could meet the challenge presented by a limited PLAN offensive.

Brunei in particular has emerged as a promising new maritime actor in the region, even actively participating in the 2014 edition of the Rim of the Pacific Exercise (RIMPAC). The Royal Brunei Navy acquired four specially built Darussalam-class offshore patrol ships (1,625 tonnes) from the German shipbuilder Luerssen-Werft, which replaced Brunei’s previous coastal defence workhorse, the Waspada-class fast attack craft (200 tonnes). The Waspada-class vessels have since been decommissioned and donated to Indonesia to be used for training purposes. The introduction of the Darussalam-class greatly upgrades Brunei’s defence capabilities and it will be of interest for Southeast Asian observers to see how Brunei further pursues the modernization of its forces.

The Republic of Singapore Navy has much in the way of heavier frigates and submarines to defend its unique position by the Strait of Malacca, one of the world’s most significant shipping routes. Its corvette-like vessels are also impressive, six Victory-class corvettes (600 tonnes) and 12 Fearless-class offshore patrol ships (500 tonnes), but they are certainly not as new as some of the vessels boasted by Singapore’s neighbours. The Victory-class was acquired in 1990-1991 while the Fearless-class was introduced between 1996 and 1998. Therefore, it will also be of interest to see whether Singapore seeks to obtain any newer vessels which can serve as a bridge in capabilities between the Victory-class corvettes and the heavier Formidable-class frigates.

dsc_5220It is Thailand, the Philippines, and Indonesia that boast the largest complements of corvettes in the region, however. The Royal Thai Navy’s coastal defence is led by two Tapi-class corvettes (1,200 tons) and two Pattani-class offshore patrol ships (1,460 tons), which are joined by two Ratanakosin-class corvettes (960 tons), three Khamrosin-class corvettes (630 tons), three Hua Hin-class patrol boats (600 tons), six PSMM Mark 5-class patrol boats (300 tons), and 18 smaller patrol boats and fast attack boats of varying capabilities but all rather aged. The Philippines and Indonesia both have vast island chains within their respective territories, requiring corvettes and smaller patrol vessels just as much for counter-trafficking and counter-piracy operations as for countering conventional maritime forces. The Philippine Navy possesses one Pohang-class corvette (1,200 tons), two Rizal-class corvettes (1,250 tons), nine Miguel Malvar-class corvettes (900 tons), and three Emilio Jacinto-class corvettes (700 tons). Indonesia tops out ASEAN’s array of corvettes with three Fatahillah-class corvettes (1,450 tons), 16 Kapitan Patimura-class corvettes (950 tons), and 65 other missile boats and gunboats with a displacement of approximately 100-250 tons.

Yet it is unclear how much of their forces Indonesia or the Philippines would be able to deploy in the midst of a South China Sea conflict. As mentioned previously, many of these vessels have been used practically as inland patrol vessels. There are also some potential weak links in the chain should ASEAN establish some form of formalized maritime alliance. The Royal Malaysian Navy only offers four Laksamana-class corvettes (675 tons) and an array of 16 smaller missile boats and gun boats that could generally only be used to harass Chinese forces. Burma certainly has an impressive force in its own right – consisting of three domestically produced Anawratha-class corvettes (1,100 tons), six Houxin-class missile boats (500 tons), 10 5 Series-class missile boats (500 tons), and 15 Hainan-class gunboats (450 tons), but the military junta has already demonstrated that it will remain aloof from territorial disputes in the South China Sea and generally supports China’s policy toward Southeast Asia.

The Royal Cambodian Navy is in shambles, consisting solely of five outdated Turya-class torpedo boats (250 tons), five Stenka-class patrol boats (250 tons), and a lone Shershen-class fast attack boat (175 tons). But Cambodian authorities would be just as disinclined to engage in defence sharing as their Burmese counterparts. During Cambodia’s 2012 ASEAN chairmanship, Cambodian officials consistently interfered in efforts by other ASEAN member states to reach a common position on the South China Sea’s territorial disputes. Given the understanding on security issues shared between Cambodian and Chinese officials, as well as China’s status as Cambodia’s largest source of foreign investment and aid, it is apparent that Cambodia has relatively no need for the security guarantees ASEAN could provide as a regional counter-balance to China.

Vietnam is the unpredictable factor in the region. The Vietnam People’s Navy has a few corvettes of its own, including a Pauk-class corvette (580 tons), eight Tarantul-class corvettes (540 tons), and 23 patrol ships with displacements ranging from 200 to 375 tons. The Vietnamese government has also ordered two more TT-400TP gunboats (450 tons) from domestic shipbuilders with delivery expected in late 2015 or early 2016. This leaves Vietnam with a force perhaps not as sizable as that of Indonesia or the Philippines but with greater capacity to intervene should China seek to settle territorial disputes with Vietnam by force.

As Malaysia will hold the 2015 Chairmanship of ASEAN, the prospects for a maritime force in support of the bloc’s proposed Political-Security Community will depend to some degree on whether Malaysian officials will be willing to show leadership. If Malaysia looks to acquire new vessels and insists on placing maritime security on the agenda of upcoming ASEAN meetings, some arrangement could be struck by the end of the year. But this will require artful diplomacy, especially in the face of Burmese and Cambodian opposition. With Malaysian officials speaking predominantly about the need for a single market in the region and promoting a conclusion to negotiations regarding the Regional Comprehensive Economic Partnership, such a drive for maritime security may not be forthcoming.

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

This article can be found in its original form at the  
NATO Council of Canada and was republished by permission.

Capability Analysis

LCS Versus the Danish Strawman

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nils juel 2Many critics have assailed the Littoral Combatant Ship (LCS) program for its high cost in comparison with foreign, supposedly better armed and equipped equivalents. The Danish Iver Huitfeldt and Absalon class frigates are often cited as examples of cheaper, more capable small combatants in comparison with LCS. These claims are not well researched and are based on isolated points of data rather than any systemic analysis. Other nations may be able to build relatively cheap warships, but hidden factors not discussed by critics, rather than U.S. shipbuilding and general acquisition deficiencies make this possible. The Danish Navy, in conjunction with corporate giant A.P. Moeller have produced an outstanding series of warships, but a direct comparison between them with the LCS is one of apples verses oranges. It’s time to stop using this inaccurate strawman argument against LCS.

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The direct comparison of the Danish frigates to LCS is highly misleading due to significant differences in Danish shipbuilding practice and financial accounting. The Danish “StanFlex” system of “plug and play” weapons, sensors and equipment (including cranes!) officially separates these components from the advertised cost of the ship. A 2006 RAND report on the rise in warship costs specifically identified such systems as the principal drivers of warship cost inflation. The Danish concept of separating these more costly systems from their hull gives the appearance of a much less expensive warship. The ships were often accepted by the Danish Navy in an incomplete condition. The Danish Nils Juel, for example, was delivered in 2014 with 76mm guns scavenged from decommissioned ships. Danish figures suggest that the Iver Huitfeldt program used $209 million in reused equipment from scrapped vessels. Reuse, however, could not meet all system requirements. The planned 127mm (5 inch) gun system was deemed too expensive at $50 million a copy. The ship’s close-in weapon system mount was actually a dummy, wooden weapon due to a lack of certification. While equipped with a MK 41 vertical launch missile system (VLS), the ship deployed to the fall 2014 U.S. Bold Alligator exercise without the system certified for use or weapons purchased for eventual outfitting. That same reporting indicated that the ship was delivered with its damage control system incomplete and lacking a secondary steering control center. Much of the ship is built to merchant ship standards which are not as robust as those traditionally provided to warships. In addition, the Danish ship was forced to take on nearly 20 extra crew members when the lean 100 person complement was found insufficient for operational needs.

The Absalon class is more akin to a heavily armed, limited load amphibious ship rather than a surface combatant. It combines a number of warfare and expeditionary capabilities on a single hull, but excels at none of them. It is also significantly slower (at 24 knots maximum speed) than most other surface combatants. Both Absalon and her sister Esbern Snare were also delivered without their full installation of weapons and sensors. In the case of Absalon, this process took over three years. The Danish Navy has been open in regards to these conditions. U.S. advocates of adopting the Absalon or Iver Huitfeldt classes almost always overlook them.

The LCS, by contrast is delivered with significant systems such as its 57mm gun and point defense missile system incorporated into the overall cost. Scavenging of weapons from previous U.S. ships is extremely difficult due to a constant process of upgrades over time. Weapon systems, like ships also have service lives and U.S. ships being decommissioned often have equally aged weapons and supporting electrical, hydraulic and mechanical systems that make a re-installation not cost effective. Unlike the Absalon class which is not equipped to master any one warfare area in any of its configurations, the LCS can be exclusively equipped to master one such discipline. It is purposely designed to operate in tailored flotillas designed to mitigate the risks incurred by one ship like Absalon. Critics often fail to note that both Iver Huitfeldt and Absalon are nearly twice the size of LCS.  Neither has the speed requirements that drove initial LCS design considerations. The size difference alone may explain the Danish ships’ much longer endurance. These differences in Danish and U.S. practices make comparisons difficult at best.

Finally, the Danish Navy contracted the building of both the Iver Huitfeldt and Absalon classes to a single firm, the A.P. Moeller Corporation. This multinational giant derives the vast bulk of its earnings from the more stable commercial market and its warship business is not dependent on government orders, which causes instability and cost overruns in its production process. By contrast, U.S. LCS shipbuilders Lockheed Martin and Austal serve government interests much more than private ones and are more dependent on government contracts to maintain stability in their operations. The 2006 RAND report also identified this process of divided warship construction as another factor in the increased cost of surface combatants.

The LCS program has been beset with a number of technological and systemic problems since its inception that have slowed the program’s progress and likely contributed to some cost overruns. On the surface, the Iver Huitfeldt and Absalon class frigates would appear to be cost effective alternatives to the LCS. Deeper investigation, however, reveals how the Danes achieved these substantially lower figures by separating higher cost equipment from that of the platform, scavenging weapons from decommissioned ships, accepting incomplete warships for service, and purchasing these vessels from a single, robust commercial shipbuilder not dependent on or affected by unstable government ship acquisition processes. In summary, these classes meet Denmark’s needs, but are an unsuitable substitute for U.S. Navy small combatants. LCS critics, however, should not use the Danish ships as strawman LCS substitutes. It is a most unequal comparison.

Steve Wills is a retired surface warfare officer and a PhD student in military history at Ohio University. His focus areas are modern U.S. naval and military reorganization efforts and British naval strategy and policy from 1889-1941. 

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