submarine

Poland’s next submarines will be provided by Sweden, in the shape of the advanced A26 class. Under the long-running Orka acquisition program, Warsaw announced today that it will buy three of the boats, which use an air-independent propulsion system, to replace the Polish Navy’s single Soviet-era Kilo class submarine. The new multirole subs will be able to launch and recover uncrewed underwater vessels (UUVs), as well as be used for minelaying, intelligence collection, anti-surface warfare, anti-submarine warfare, and more.

The Saab design was chosen in favor of competing offers from France’s Naval Group, Germany’s ThyssenKrupp Marine Systems, Italy’s Fincantieri, South Korea’s Hanwha Ocean, and Spain’s Navantia.

“We are honored to have been selected and look forward to the coming negotiations with the Armaments Agency in Poland,” said Micael Johansson, president and CEO of Saab, in a statement announcing the order today.

“The Swedish offer, featuring submarines tailored for the Baltic Sea, is the right choice for the Polish people. It will significantly enhance the operational capability of the Polish Navy and benefit the Polish economy,” Johansson added.

The Swedish offer was made by the country’s government on behalf of Saab. At this point, no contract has been signed, but Saab and the Swedish Defense Materiel Administration (FMV) will now complete the procurement process together with Polish authorities.

Statements on Poland’s selection of the A26 were also provided by the Prime Minister of Sweden, Ulf Kristersson, and Pål Jonson, the Swedish Minister of Defense:

Poland has chosen Sweden as partner for its submarine program.

This shows the strength not only of the cooperation between our countries, but also of Sweden as a defense-industry nation. It is confirmation that the Swedish defense industry stands strong. Saab has a… pic.twitter.com/WhSFlQru7n

— Ulf Kristersson (@SwedishPM) November 26, 2025

🇵🇱🇸🇪Today is a historic day for the Swedish-Polish partnership and for increased security in the Baltic Sea. Poland has selected Swedish submarines for the Polish navy. This will strengthen our common defence, security, and defence industrial base. pic.twitter.com/2WjiSu8o5L

— Pål Jonson (@PlJonson) November 26, 2025

Saab says that the deal will include industrial cooperation with Poland as well as technological transfer, as part of a broader strategic partnership between the two countries. For Sweden, the first export customer for this promising design provides a significant boost to the program, at a time when delays and cost overruns mean it’s much-needed. A total of five boats increases the demand for in-service support, and the Polish seal of approval could open the door to more exports.

Although it has been reported that the three submarines will cost $2.52 billion, it remains unclear when they might be delivered.

The A26 uses air-independent propulsion (AIP), a technology that The War Zone has examined in detail in the past. Specifically, as well as diesel engines, this employs a Stirling-type engine as previously used in the influential Swedish Gotland class design. The Stirling auxiliary engine burns liquid oxygen and diesel to drive electrical generators that can be used for either propulsion or charging the batteries. The result is a conventionally powered submarine that’s able to remain submerged for reportedly more than 18 days, without needing to surface or use a snorkel.

The A26 has the option of being fitted with vertical launch system (VLS) cells, compatible with Tomahawk land attack missiles, which might be of interest to Poland as it seeks to reinforce its long-range strike capabilities.

Another notable feature of the A26 design is its sail, which is raked along its leading edge and which flares out toward the top. As we have discussed in the past, this feature is understood to have been chosen to increase its stealth characteristics. The A26 also features an X-form rudder. As we have discussed in the past, this configuration provides improved maneuverability, efficiency, and safety, and also helps reduce the acoustic signature across significant parts of the submarine’s operating envelope compared to the more traditional cruciform system.

Other details of the A26 design include a length of around 217 feet and a surfaced displacement of 2,122 tons. The submarine has a standard complement of just 26 sailors but can also accommodate up to 35 more, including commandos for special forces missions. The commandos can be delivered via the Multi-Mission Portal, similar to an oversized torpedo tube, which provides access to a flexible payload lock.

The A26 is also being built for the Royal Swedish Navy, with two Blekinge class boats under construction at Saab’s Kockums shipyard in Karlskrona. Originally planned to be handed over in 2024 and 2025, it recently emerged that delays would push the delivery of the first of these boats to 2031, while increasing costs will see the program reach a price tag of 2.3 billion Euros (around $2.7 billion). The second Swedish submarine is scheduled to be delivered in 2033. Between them, the new boats will replace the Royal Swedish Navy’s two Södermanland class submarines.

Buying three advanced submarines marks a major advance for the Polish Navy, which has, for many years, only had a single Project 877E Kilo class submarine, the ORP Orzel, in its fleet. The age of this boat and the impossibility of obtaining spare parts and support from Russia mean that it’s unclear if the Orzel is currently operational.

As Saab’s Johansson pointed out, the Polish Navy will be getting a submarine that has been purpose-designed for the Baltic Sea. Notably shallow and confined, with dense littorals, including complex undersea obstacles and islands, the Baltic imposes very particular requirements on submarine designs, something that has long been reflected in successive classes built in Sweden (as well as in Germany).

In particular, the Baltic environment calls for diesel-electric submarines that are able to transit covertly in areas with a water depth of less than 82 feet and operate in an environment with a potentially high density of anti-submarine warfare forces and naval mines.

Warsaw’s investment in the three new submarines is just one part of a much larger defense spending spree — what the Polish Armed Forces themselves describe as “one of the highest levels of defense spending in NATO.”

The Polish Air Force is gearing up to receive 32 F-35A fighters, which will be armed with long-range precision weapons. Dozens of FA-50 light combat aircraft are also being delivered.

Poland’s first F-35 is on the move! 🏃‍♂️

AZ-01 has been moved to the final finishes facility to receive its stealth coating, bringing it one step closer to rollout.

Poland’s 32 F-35s will strengthen NATO and European allies in the region. pic.twitter.com/N8TqsMHBLG

— F-35 Lightning II (@thef35) July 31, 2024

Within the air defense branch, Poland plans by 2032 to introduce new air and missile defense systems procured under the Narew and Wisła programs, which cover the short-range and medium-range air defense segments, respectively.

Meanwhile, the Polish Land Forces are getting 250 of the latest Abrams M1A2 SEPv3 tanks, worth up to $6 billion, that will serve alongside a similar number of German-made Leopard 2s already in use. The Land Forces also expect to benefit from additional investments in operational fires, including new tube and rocket artillery, which will be employed in combination with 96 new AH-64E Apache attack helicopters. Furthermore, a significant South Korean arms package includes tanks, short-range ballistic missiles, and self-propelled artillery, as well as the aforementioned FA-50s.

Alongside the new submarines, Polish naval capabilities are also being reinforced by new coastal missile units and mine warfare technologies.

All of this military buildup comes in direct response to Russian aggression against Ukraine, which has provided Poland with a salutory reminder of the importance of robust defenses. With its choice of the A26 class, Poland will be getting one of the most capable conventionally powered submarines available and making another statement about how strongly it takes its defense.

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SEOUL, Nov. 14 (UPI) — The United States and South Korea on Friday released a joint fact sheet on a sweeping trade and security agreement that details a $350 billion investment pledge by Seoul and confirms Washington’s approval for its Asian ally to develop nuclear-powered submarines.

The document comes two weeks after U.S. President Donald Trump and South Korean President Lee Jae Myung finalized their trade negotiations on the sidelines of the Asia-Pacific Economic Cooperation forum in Gyeongju on Oct. 29.

“With this, the Korea-U.S. trade and security negotiations, which have been one of the greatest variables affecting our economy and security, have finally been concluded,” Lee said in a televised press briefing and Facebook post on Friday.

Lee expressed “gratitude and respect” for Trump’s decision and said both sides “achieved the best possible outcome, based on common sense and reason.”

Under the terms of the deal, Trump’s so-called “reciprocal” tariffs on South Korean goods, including automobiles, will drop from 25% to 15%, returning to the level initially established in July during Lee’s visit to the White House.

In exchange for the lower tariffs, South Korea has pledged to invest $350 billion in the United States, including $150 billion in the U.S. shipbuilding sector and $200 billion for strategic sectors under a memorandum of understanding to be signed by the two countries.

To minimize the impact on South Korea’s foreign exchange market, Seoul’s annual investment cap was set at $20 billion, the fact sheet said.

“The two governments confirmed that Korea’s investments will proceed only within a level our economy can fully sustain and only in commercially viable projects,” Lee said. “The mistrust and concerns of some who were worried this was a ‘de facto grant’ under the guise of investment in projects with difficult returns have been completely dispelled.”

The fact sheet also formalized Washington’s approval for Seoul’s plan to build nuclear-powered submarines, a capability South Korean leaders have pursued for years. Seoul has framed nuclear-powered vessels as essential for tracking North Korean ballistic missile submarines and for expanding its reach across the Indo-Pacific. Officials also see the program as a catalyst for the country’s nuclear energy and naval shipbuilding industries.

The agreement said Washington will work with Seoul to define requirements for the project, “including avenues to source fuel.” Securing enriched uranium for submarine reactors had been a sticking point in the release of the fact sheet, as Seoul has sought revisions to its bilateral nuclear cooperation pact to allow greater flexibility in enrichment and nuclear waste recycling.

Lee called the submarines “a decades-old dream of South Korea and a vital strategic asset for peace and stability on the Korean Peninsula.”

The agreement comes as Washington and Seoul undertake a broader effort to modernize their security alliance and reshape how the two countries share military responsibilities. The fact sheet noted that South Korea intends to raise defense spending to 3.5% of GDP “as soon as possible,” and reiterated a commitment to the eventual transition of wartime operational control to Seoul.

Seoul also pledged to spend $25 billion on U.S. military equipment purchases by 2030 and outlined plans to provide comprehensive support for U.S. Forces Korea amounting to $33 billion.

“The South Korea-U.S. alliance has evolved and deepened into a truly future-oriented strategic comprehensive alliance encompassing security, the economy, and cutting-edge technology,” Lee said.

As part of that broader strategic framework, the two governments reaffirmed their shared goal of a denuclearized Korean Peninsula and pledged to work together to implement the joint statement of the 2018 Singapore summit between Trump and North Korean leader Kim Jong Un.

The fact sheet called on North Korea to “return to meaningful dialogue and abide by its international obligations, including by abandoning its weapons of mass destruction and ballistic missile programs.”

North Korea has rejected calls for denuclearization since declaring itself a nuclear-armed state in 2022. In September, Kim signaled a willingness to resume diplomacy with Washington but warned that any discussion of giving up his regime’s nuclear arsenal would be off the table.

Russia has launched the first of its new Project 08951 class of nuclear-powered submarines, named Khabarovsk, which is intended to be armed with the Poseidon nuclear-powered, nuclear-tipped, ultra-long-endurance torpedo. At this stage, details of the new submarine remain scarce, but its completion, though long delayed, reflects the continued priority Moscow is assigning to strategic weapons systems, including novel ones without direct comparison.

The Khabarovsk was launched in Severodvinsk in Russia’s Arctic North over the weekend, in a ceremony attended by Russian Minister of Defense Andrei Belousov, as well as the commander of the Russian Navy, Adm. Alexander Moiseev, and the heads of the United Shipbuilding Corporation and the Sevmash shipyard. Imagery released from the event primarily shows the rear part of the submarine, still out of the water, in the construction hall.

The Khabarovsk is described by the Russian Ministry of Defense as a “nuclear-powered missile cruiser,” a broad category that Russia usually applies to nuclear-powered ballistic missile submarines (SSBNs). However, there is no indication that the new boat will carry ballistic missiles, with the primary armament of Poseidon torpedoes instead likely to be supplemented by land-attack and anti-ship cruise missiles and traditional torpedoes. The Russian military also says the submarine will be equipped with unspecified robotic systems.

The submarine was designed by the Rubin Central Design Bureau for Marine Engineering and is reported to be based on the hull of the Borei class SSBN. This should reduce the program costs and make it stealthier than many other Russian submarines. The Khabarovsk has a similar-looking stern section to the Borei class, including the pump-jet propulsor, which was partly covered to obscure any details.

The end result, however, is significantly smaller, since the ballistic missile section is removed. The Khabarovsk reportedly has a surfaced displacement of around 10,000 tons, compared to close to 15,000 tons for the Borei class. The Project 08951 is thought to have a length of around 370 feet, while the Borei class is almost 560 feet long.

Most notable, however, is the fact that the Project 08951 class has been designed around the Poseidon torpedo from the outset. It is understood to be able to carry six examples of these weapons, each of which is around 66 feet long, approximately six feet in diameter, and weighs 110 tons.

Last week, Russia’s President Vladimir Putin said that the country had, for the first time, conducted the first long-range test of a Poseidon torpedo from a submarine, as you can read about here.

“For the first time, we managed not only to launch it with a launch engine from a carrier submarine, but also to launch the nuclear power unit on which this device passed a certain amount of time,” the Russian president claimed.

The Khabarovsk is the second Poseidon-capable submarine that we know of, after the Project 09852 Belgorod, which entered service with the Russian Navy in 2022. However, this boat is a conversion of an existing Oscar II class nuclear-powered guided-missile submarine (SSGN). Once heavily reworked, it added the capacity to carry six Poseidon torpedoes but is also expected to fulfill other roles.

Russia has described the Belgorod as a “research” vessel able to conduct “diverse scientific expeditions and rescue operations in the most remote areas of the world ocean.” In fact, it’s considered to service more as a ‘mother ship’ that can also deploy a variety of deep-sea drones, a deep-diving nuclear-powered minisub, and a submersible nuclear powerplant to power an undersea sensor network.

The Russian Ministry of Defense says the Khabarovsk “is capable of effectively defending Russia’s maritime borders and ensuring the security of its interests in the world’s oceans.”

It would appear, however, that carrying the Poseidon torpedo is its primary purpose.

The Poseidon is a unique weapon that we have described in the past:

“It is assumed that the primary mission of the Poseidon is to strike coastal installations with little to no warning. There have been various reports that it’s armed with an especially ‘dirty’ warhead, which would ensure not only the usual thermonuclear destruction but also spread radioactive contamination over a wide area. There have also been accounts suggesting that it could potentially be detonated further out to sea to create a kind of radioactive tsunami that could bring even more destruction and contamination to a wider coastal area, although the accuracy of these reports is debatable.”

“…with its nuclear propulsion, the weapon should have the ability to cruise around the oceans for extremely long periods before unleashing a surprise attack. This is especially concerning, since it would make it difficult to defend against. Like the Burevestnik [ground-launched nuclear-powered cruise missile], if perfected, it would provide Russia with a strategic nuclear option that avoids existing missile defense systems.”

It appears that Russia is seeking to deploy Poseidon as a new type of second-strike capability. This capability means that even if a surprise nuclear barrage were to knock out Russia’s nuclear weapons capability, it still has the ability to make the attacker pay dearly via a retaliatory nuclear attack. Second-strike is considered the pinnacle of nuclear deterrent strategies and, in a Russian context, traditionally relies heavily on SSBNs. A more versatile second-strike capability could be more important once the United States fields its planned Golden Dome missile defense system.

U.S. President Donald Trump, the prime architect of Golden Dome, has meanwhile responded to recent Russian tests of the Burevestnik and Poseidon systems. Following on from Putin’s bellicose comments on the Burevestnik test, Trump said: “I don’t think it’s an appropriate thing for Putin to be saying,” reminding the Russian leader that the priority was to bring an end to the war in Ukraine. The U.S. leader then announced that the Department of War is to start testing nuclear weapons “immediately,” though the implications of this remain unclear.

Regardless of how Poseidon might actually be used in an operational scenario, the addition to the Russian fleet of an entirely new category of submarine provides potential adversaries with a notable headache.

Already, much of NATO’s anti-submarine warfare effort goes into tracking and potentially defeating Russian SSBNs and SSGNs, as well as the hunter-killer submarines that are tasked, among other things, with protecting them. With its strategic nuclear weapons, the Project 08951 class could potentially emerge as another leg of Russia’s seaborne nuclear deterrent, but one that is able to launch its weapons from unexpected vectors and at huge distances from potential targets.

In the past, analysts have suggested that Poseidon could have a range of 6,200 miles. Once launched, it is also likely also very difficult to defeat. There have even been some claims that it can reach a speed of up to 100 knots, although this is probably an exaggeration. Even at much reduced speeds, the Poseidon would be hard to intercept and may demand new kinds of methods and technologies to counter it.

The result, depending on how quickly the Khabarovsk enters operational service and how many other boats in this class will be completed, could have a significant disruptive effect on the way that NATO goes about anti-submarine warfare.