Articles tagged with "submarine-technology"
New US Navy contract speeds up stealth nuclear submarine program
The US Navy has awarded General Dynamics Electric Boat a $15.38 billion contract modification to accelerate the Columbia-class nuclear-powered ballistic missile submarine (SSBN) program. This funding aims to address supply chain disruptions and delays that have slowed the delivery of the first submarines in the 12-vessel fleet, which is set to replace the aging Ohio-class submarines by the 2030s. The Columbia-class submarines, measuring 560 feet in length and capable of speeds over 20 knots with a diving depth exceeding 800 feet, will be the largest in the Navy’s history. They are armed with 16 Trident D5 ballistic missiles and feature advanced stealth technologies, including noise-reducing propulsion and acoustic coatings. The program has faced challenges such as supply chain disruptions linked to the COVID-19 pandemic, delayed material deliveries, and redesign efforts. Additionally, the US submarine supplier base has significantly contracted from about 17,000 suppliers in 1980 to 3,500 in
energynuclear-powersubmarine-technologydefensesupply-chainstealth-technologypropulsion-systemsUS Navy funds nuclear submarine missile control upgrade for Trident II
The US Navy has awarded General Dynamics Mission Systems a $255 million contract to sustain and modernize the fire control system for the Trident II D5 ballistic missile, ensuring its compatibility with both the current Ohio-class and future Columbia-class ballistic missile submarines. This upgrade is critical for maintaining the precision, reliability, and operational continuity of the sea-based leg of the US nuclear triad as the Navy transitions to the next-generation Columbia-class submarines. The contract covers lifecycle support, development, production, and installation of the new fire control systems through 2032, with most work conducted in Pittsfield, Massachusetts. The Trident II Fire Control System serves as the digital interface that integrates the submarine’s navigation, mission computers, and missile launch tubes, managing targeting data, ballistic trajectories, and launch parameters while submerged. It supports up to 24 Trident II missiles on Ohio-class submarines and will be adapted for Columbia-class boats to maintain seamless operational compatibility. This modernization effort underpins the continuity of the
robotenergymilitary-technologymissile-control-systemssubmarine-technologynuclear-deterrencedefense-systemsItaly building advanced 1,600 ton submarines to replace old vessels
Italy has commenced construction of advanced submarines to modernize its naval fleet, replacing aging vessels from the 1980s. The first keel-laying ceremony was held for the U212 Near Future Submarine (U212 NFS) at Fincantieri’s Muggiano shipyard. The initial submarine, designated NFS1 S530, began construction in 2022 and is expected to enter service by 2029, with the full four-submarine program slated for completion by 2032. These new submarines represent a significant technological leap over the previous U212A class, featuring enhanced Italian technological integration, improved stealth, endurance, operational efficiency, and cyber resilience. Key innovations include the use of lithium-ion propulsion batteries, a new-generation combat system with advanced command and weapon control, and design improvements such as an extended pressure hull and redesigned combat information center. The submarines will displace 1,600 tons, measure approximately 59 meters in length, accommodate a crew of
energylithium-ion-batteriessubmarine-technologynaval-engineeringadvanced-materialspropulsion-systemsenergy-storage-systemsFrance to expand nuclear arsenal, extend protection to European allies
France announced a major shift in its nuclear defense policy, expanding its nuclear arsenal and extending elements of its protection to European allies amid growing security tensions. President Emmanuel Macron revealed plans to increase the current stockpile of about 300 nuclear warheads, though France will no longer publicly disclose the total number. A key component is the development of a new nuclear-armed submarine, The Invincible, set to launch in 2036, enhancing France’s sea-based deterrent. Macron emphasized that nuclear strike authority remains centralized under the French president, with no automatic nuclear guarantees to partner countries; the strategy focuses on deterrence by signaling a high cost to any attack on France. Eight European nations— the UK, Germany, Poland, the Netherlands, Belgium, Greece, Sweden, and Denmark—have joined an “advanced deterrence” framework, allowing participation in French nuclear exercises and potentially hosting French nuclear-capable bombers. This initiative aims to complicate adversaries’ strategic calculations by dispersing French nuclear forces across Europe
energynuclear-energydefense-technologysubmarine-technologystrategic-deterrencemilitary-materialsEuropean-securityFrance trials nuclear-powered attack submarine to modernize fleet
France has advanced its naval modernization with the De Grasse, the fourth Suffren-class nuclear-powered attack submarine, beginning sea trials on February 24, 2026. This milestone follows the activation of its nuclear reactor in December 2025 and extensive dockside testing since its launch in May 2025. The De Grasse is part of the Barracuda program, a long-term initiative to replace the aging Rubis-class submarines from the 1980s with six modern, stealthier, and more capable vessels. Managed by the French defense procurement agency (DGA) and developed in partnership with the French Atomic Energy and Alternative Energy Commission (CEA), Naval Group, and TechnicAtome, the program aims to sustain France’s undersea warfare capabilities through at least 2060. The Barracuda-class submarines are designed for over 30 years of service, featuring enhanced stealth, longer endurance, and expanded combat capabilities compared to their predecessors. Each submarine displaces around 4
energynuclear-propulsionsubmarine-technologydefense-technologymarine-engineeringrenewable-energy-alternativesnaval-innovationChina's neighbor to roll out 7,000-ton nuclear ballistic missile sub
The Indian Navy is set to commission its third nuclear-powered ballistic missile submarine, INS Aridhaman (S4), by mid-2026. This 7,000-ton vessel is the largest in the Arihant-class program and features significant upgrades over its predecessors, INS Arihant and INS Arighaat. Built under the Advanced Technology Vessel program with about 75% indigenous content, INS Aridhaman has a lengthened hull (426 feet) to accommodate a heavier missile payload, including up to 24 short-range K-15 missiles, eight intermediate-range K-4 missiles, and is designed to carry longer-range K-5 missiles capable of striking targets up to 6,000 kilometers away. It also doubles the vertical launch system tubes from earlier models, enhancing its strike capabilities. The submarine is powered by an advanced, quieter 83-megawatt compact light water reactor (CLWR-B1) designed specifically for the Arihant-class, improving stealth through reduced
energynuclear-powersubmarine-technologyballistic-missilesdefense-technologystealth-technologynaval-engineeringChina’s stealth nuclear attack submarine spotted in satellite images
Satellite imagery has revealed what is believed to be China’s first next-generation Type 09V (095) nuclear-powered attack submarine, marking a major advancement in the modernization of the People’s Liberation Army Navy’s undersea fleet. The submarine was recently moved into a launch bay at the Bohai Shipbuilding facility in Huludao, where China builds its nuclear submarines. Initial images suggested it might be an upgraded Type 093B, but higher-resolution photos showed design features consistent with a new class, including a larger and wider hull estimated at 12 to 13 meters in beam and about 110 to 115 meters in length. This wider hull likely increases submerged displacement to around 9,000–10,000 tons, a significant jump from the roughly 7,000 tons of earlier Shang-class submarines. Key design changes include the first use of an X-shaped stern rudder configuration on a Chinese nuclear submarine and hull-mounted retractable dive planes instead of sail-mounted control surfaces. The hull
energynuclear-powersubmarine-technologymilitary-materialspropulsion-systemsstealth-technologynaval-engineeringUS Navy's new facility to advance submarine-launched Trident II missiles
The US Navy has initiated construction of a new Engineering Test Facility (ETF) at Cape Canaveral Space Force Station to support the development and modernization of the submarine-launched Trident II D-5 Life Extension 2 (D5LE2) missile system. Awarded in November 2025 to Walsh Federal for $166 million, the 130,000-square-foot facility is slated for completion by January 2028. It will house multiple labs, heavy-lift cranes, and support spaces to enable prototyping, testing, and production of flight hardware and support equipment for the next-generation Trident II missiles. This development follows recent successful test flights of unarmed D5LE missiles from Ohio-class submarines, underscoring the system’s reliability and accuracy. The Trident II D5 missile system, originally developed in the 1980s and life-extended in 2017 to remain operational into the 2040s, is a critical component of the US nuclear triad’s
energydefense-technologymissile-systemssubmarine-technologystrategic-weaponsmilitary-infrastructurenuclear-deterrenceHow diesel submarines run underwater without engines needing air
Diesel-powered submarines face the fundamental challenge that their engines require oxygen to operate, yet they routinely travel underwater where air is unavailable. Naval engineers resolved this over a century ago by developing the diesel-electric propulsion system. In this setup, diesel engines run only when the submarine is surfaced or near the surface using a snorkel mast, powering generators that charge large onboard batteries. Once submerged, the diesel engines are shut down, and the submarine moves silently using electric motors powered by the stored battery energy. This separation of power generation and propulsion allows underwater operation while enhancing stealth, as electric motors produce far less noise than combustion engines. While diesel-electric submarines can operate underwater quietly, their endurance is limited by battery capacity. To recharge, they must surface or snorkel, which risks detection due to visible masts and exhaust. To address this, many modern diesel submarines incorporate air-independent propulsion (AIP) systems that generate electrical power without atmospheric oxygen, extending underwater endurance from about two days to several weeks at
energydiesel-electric-propulsionsubmarine-technologybattery-storageelectric-motorsunderwater-engineeringnaval-engineeringWhy refueling a nuclear submarine can take more than three years
Refueling a nuclear submarine is an exceptionally complex and time-consuming process that can take up to three years or more. Unlike conventional refueling, nuclear submarine refueling involves removing the vessel from water, powering it down, and accessing the reactor core, which is deeply embedded within the submarine’s hull and shielded for radiation protection. This requires dismantling major components, including shielding, panels, cables, and bolts, all meticulously logged and inspected by a specialized team of experts in radiation safety, nuclear engineering, and naval architecture. The intricate nature of this operation, combined with the need for a radiation-shielded facility, contributes to its high cost and lengthy duration. The actual refueling involves replacing the highly enriched uranium fuel in the reactor core, but this is not the primary reason submarines resurface, as a small amount of fuel can power them for decades. Instead, refueling periods are often used to perform extensive overhauls and upgrades to the submarine’s systems to keep pace with evolving military technologies
energynuclear-energysubmarine-technologynuclear-reactorsnaval-engineeringnuclear-propulsionreactor-refueling10,200-ton submarine for US: Hanwha proposes to build nuclear vessels
South Korean defense conglomerate Hanwha Group has proposed building nuclear-powered Virginia-class submarines for the U.S. Navy at its Philadelphia shipyard, which it acquired and has been modernizing since 2023. This proposal comes amid growing pressure on the U.S. Navy to expand its submarine fleet and address production delays at existing shipyards. Hanwha emphasizes that its facility could help alleviate the current bottleneck by adding critical shipbuilding capacity, supporting the U.S. government's strong commitment to nuclear submarine capabilities for itself and its allies. Nuclear-powered submarines like the Virginia class are among the most complex military platforms to construct, requiring stringent safety, security, and regulatory compliance along with specialized infrastructure and skilled labor. Hanwha’s plan would expand the U.S. naval industrial base rather than replace existing builders, marking a significant development in defense-industrial cooperation between the U.S. and South Korea. The Virginia-class submarines, with a submerged displacement of about 10,200 tons,
energynuclear-powersubmarine-technologyshipbuildingdefense-industrymilitary-technologyHanwha-GroupNorth Korea reveals progress on 8,700-ton nuclear submarine project
North Korea has revealed significant progress on its 8,700-ton nuclear-powered submarine project, with state media releasing images showing leader Kim Jong Un inspecting a nearly completed submarine hull at a shipyard. The vessel, described by the regime as a "strategic guided missile submarine" or "strategic nuclear attack submarine," is intended to carry nuclear weapons and represents a key part of North Korea's efforts to modernize and nuclear-arm its navy. Experts note that the advanced stage of hull completion suggests major internal systems are likely installed, potentially allowing for sea testing within months. This development raises serious regional security concerns due to the enhanced stealth and strike capabilities such a submarine would provide. During the inspection, Kim sharply criticized South Korea’s plans to develop nuclear-powered submarines, calling them an offensive threat that justifies Pyongyang’s own naval enhancements. He framed the submarine’s completion as an "epoch-making" milestone in strengthening North Korea’s nuclear deterrent amid ongoing regional tensions. The nuclear-powered submarine program was
energynuclear-powersubmarine-technologymilitary-technologymaterials-scienceanti-corrosion-coatingdefense-systems40 Tomahawks on One Submarine — Block V Virginia-Class
The Virginia-class nuclear-powered attack submarines represent a pinnacle of undersea warfare technology, combining decades of innovation into a highly advanced and adaptable platform. These submarines are designed for stealth, endurance, and versatility, featuring near-silent propulsion systems, anechoic coatings, and isolated machinery to minimize noise and avoid detection. Powered by nuclear reactors that last the vessel’s entire service life, they carry about 130 crew members and can undertake a wide range of missions, including anti-submarine warfare, intelligence gathering, land attacks, special operations support, and deployment of unmanned underwater vehicles. A significant advancement in the class is the Block V variant, which incorporates the Virginia Payload Module (VPM)—an 84-foot hull extension housing four large missile tubes capable of launching up to 28 additional Tomahawk cruise missiles. This enhancement effectively transforms the submarine into a near-arsenal platform, compensating for the retirement of Ohio-class guided-missile submarines and reinforcing U.S. and allied naval
energynuclear-reactorsubmarine-technologypropulsion-systemsmilitary-materialsunmanned-underwater-vehiclesnaval-engineeringNew 7,000-ton nuclear submarine could choke 60% of China’s sea trade
India is nearing the induction of its third indigenously built nuclear-powered ballistic missile submarine (SSBN), INS Aridhaman, which is in the final trial phase. Following INS Arihant and INS Arighaat, Aridhaman will significantly enhance India’s sea-based nuclear deterrent by carrying more long-range K-4 submarine-launched ballistic missiles with a range of about 3,500 kilometers. At roughly 7,000 tons and 125 meters long, it is larger than its predecessors, offering greater missile capacity, improved survivability, and advanced sonar and defensive countermeasure systems. A fourth SSBN is also under construction to further strengthen India’s continuous at-sea deterrence capability. The commissioning of Aridhaman advances India’s strategic goal of a credible nuclear triad—land, air, and sea-based nuclear delivery systems—by improving the survivability and stealth of its nuclear forces. The submarine fleet expansion has strategic implications for regional maritime security, particularly in the
energynuclear-energysubmarine-technologydefense-technologymissile-systemsnaval-engineeringstrategic-deterrence3,500-ton attack submarine to get high-tech control module
Exail, a Paris-based company, has commenced production of the sixth advanced steering console for the Republic of Korea Navy’s next-generation diesel-electric attack submarines under the JangBogo III (Dosan Ahn Chang-ho) program. These consoles, integral to submarine navigation and control, are built around Exail’s Opsys integrated computer, which serves as the intelligence core, ensuring precise and reliable operation. Since 2014, Exail has designed, produced, and delivered five such consoles, with the sixth system’s construction starting in 2026 and commissioning planned for 2027. The development of each unit involves nearly two years of multidisciplinary work and includes comprehensive support from integration to onboard commissioning, facilitating long-term knowledge transfer. The steering console is a critical component that unifies navigation, propulsion, and control systems, enhancing mission safety, tactical efficiency, and naval autonomy. Exail’s expertise is underscored by the deployment of 15 pilot stations worldwide, confirming its role as a trusted
robotcontrol-systemssubmarine-technologynaval-defenseautomationintegrated-computingmaritime-roboticsPoland to acquire world’s first 5th-gen submarines from Sweden’s Saab
Poland has chosen Sweden’s Saab A26 submarines, described as the world’s first fifth-generation submarines, to replace its aging Soviet-era Kilo-class vessel. The decision, announced by Poland’s Deputy Prime Minister and Minister of National Defense Władysław Kosiniak-Kamysz under the Orka program, involves acquiring three advanced A26 submarines. This selection follows a competitive process where Sweden outpaced South Korea, despite Korea’s offer to transfer an active-duty submarine for free. The contract, expected to be signed by mid-2026, is valued around 10 billion zlotys ($2.74 billion) but could rise to nearly 36 billion zlotys ($9.8 billion), with the first submarine delivery planned for 2030. The Saab A26 Blekinge-class submarine is designed to meet NATO’s evolving multi-domain operational needs, featuring stealth capabilities, advanced intelligence, surveillance, and reconnaissance (ISR) functions, and long-range precision strike abilities.
robotenergymilitary-technologyunderwater-vehiclessubmarine-technologystealth-technologydefense-systemsUS Navy to add largest-ever 20,800-ton nuclear missile submarines
The Pentagon awarded General Dynamics Electric Boat a $2.28 billion contract on November 17 to support the advanced procurement and construction of five Columbia-class ballistic missile submarines (hulls SSBN-828 through SSBN-832). These submarines represent the next-generation fleet that will serve as the cornerstone of the U.S. sea-based nuclear deterrent for the next 50 years. Work will primarily occur at Electric Boat’s Groton, Connecticut shipyard, with additional activities in Rhode Island and Virginia, coordinated alongside the Naval Sea Systems Command. This contract is part of a long-term effort to replace the aging Ohio-class submarines, which have been the backbone of the U.S. nuclear triad’s sea leg since the 1980s. The Navy plans to field 12 Columbia-class submarines to replace its current fleet of 14 Ohio-class boats, which will begin retiring at a rate of one per year starting in 2027. The Columbia-class subs, the largest ever built for
energynuclear-energysubmarine-technologydefense-technologymaterials-engineeringnaval-engineeringpropulsion-systemsWorld-first: Quantum optical atomic clock deployed on unmanned sub
The article reports the successful world-first deployment of Infleqtion’s Tiqker quantum optical atomic clock on the Royal Navy’s unmanned testbed submarine, Excalibur (XCal). This trial demonstrated the clock’s ability to operate reliably through multiple dives, providing highly precise timing critical for resilient positioning, navigation, and timing (PNT) in GPS-denied underwater environments. By integrating a compact optical clock with laboratory-grade performance directly onboard, the Tiqker offers a stable “time heartbeat” that reduces navigation drift, enabling submarines to remain submerged, accurate, and covert for longer periods. This deployment aboard the Excalibur, an extra-large uncrewed autonomous vehicle (XLUAV), marks a significant advancement in autonomous underwater operations and reflects the Royal Navy’s trust in Infleqtion as a quantum technology partner. The Tiqker clock also enhances other submarine systems such as sonar, fire control, and secure communications, improving overall mission performance. Given that submarines cannot rely
robotautonomous-underwater-vehiclequantum-optical-atomic-clocknavigationprecision-timingsubmarine-technologydefense-technologySouth Korea readies 3,600-ton attack submarine to counter China
South Korea has launched the Jang Yeong-sil (SS-087), a 3,600-ton diesel-electric attack submarine and the lead vessel in the second batch of its indigenous Changbogo-III (KSS-III) program. Unveiled at Hanwha Ocean’s shipyard in Geoje, this submarine represents a significant advancement in South Korea’s naval capabilities, featuring improved sensors, enhanced stealth, longer underwater endurance, and advanced combat systems including the ability to launch land-attack cruise missiles. The vessel, built entirely with domestic technology, underscores South Korea’s strategic goal of defense self-reliance and aims to strengthen the Republic of Korea Navy’s underwater deterrence, particularly in response to regional security challenges posed by China. The Changbogo-III Batch-II submarines build on lessons from the first series by integrating improved propulsion, reduced acoustic signatures, and greater automation for extended deployments. Hanwha Ocean, formerly DSME, leads the construction and has been pivotal in
materialsenergyroboticsdefense-technologysubmarine-technologyautomationpropulsion-systemsUS finishes initial trials of 10,200-ton nuclear super submarine
The US Navy has successfully completed the initial sea trials of the Virginia-class nuclear attack submarine Massachusetts (SSN 798), a 10,200-ton vessel and the 25th in its class. Built by Huntington Ingalls Industries’ Newport News Shipbuilding division, the submarine underwent a series of tests including its first submergence and high-speed maneuvers both on the surface and underwater. These trials mark a significant milestone before the submarine’s formal delivery to the Navy. Massachusetts, christened in May 2023, will soon join the Navy’s fast-attack fleet, enhancing its operational capabilities. Virginia-class submarines are highly advanced, versatile platforms designed for a wide range of missions such as anti-submarine and anti-surface warfare, Tomahawk missile strikes, intelligence gathering, mine warfare, and Special Operations Forces deployment. Powered by nuclear reactors, they offer superior stealth, mobility, and endurance compared to conventional submarines. The class replaces the aging Los Angeles-class submarines and incorporates modular
energynuclear-propulsionsubmarine-technologynaval-engineeringVirginia-class-submarinesmissile-systemsstealth-technologyIndia's new submarines to get 200-MWe nuclear reactor to boost power
India is developing a new 200-MWe nuclear reactor at the Bhabha Atomic Research Centre (BARC) to power its next-generation submarines, including the S5 Nuclear Class Submarine and six planned Nuclear Attack Submarines (Project 77). This pressurized light-water reactor fueled by enriched uranium is highly fuel-efficient, capable of operating up to ten years without refueling. The design and simulation phases are complete, and production is imminent. This reactor will significantly enhance India’s submarine capabilities by providing higher speed, longer range, and improved stealth compared to the current 83-MWe reactors used in submarines like INS Arihant and INS Arighaat. The upgrade aims to bolster India’s strategic defense posture amid China’s rapidly expanding and technologically advanced nuclear submarine fleet, which is expected to become the world’s largest by 2030. The S5-class submarines, with a displacement of 13,000 tons and armed with 12 to 16 K-5 submarine-la
energynuclear-reactorsubmarine-technologynaval-powernuclear-propulsiondefense-technologyIndia-NavyChina to deliver 2,500-ton submarine to one of US' key allies in Asia
Thailand, a longstanding U.S. ally in Asia, has signed a deal to purchase a Chinese-built Type 039A (S26T) diesel-electric submarine, marking a significant development in regional defense dynamics. The deal, finalized in September 2025 after years of delays due to Germany’s refusal to supply engines amid the EU arms embargo on China, now involves a Chinese-made engine following successful reliability tests. The 2,550-ton submarine, featuring advanced Stirling-type air-independent propulsion alongside a conventional diesel engine, is expected to be delivered by 2028. The contract includes technology transfer and training provisions, extending construction by about 40 months. Originally planned for multiple units, budget cuts have limited the purchase to one submarine. This acquisition signals Thailand’s intent to assert strategic autonomy and maintain a balanced foreign policy, rather than a shift away from its alliance with the U.S. Analysts interpret the purchase as a message to Washington that Thailand seeks flexibility and independence in its defense posture, especially after past
energysubmarine-technologydiesel-electric-propulsionair-independent-propulsionChina-defense-exportsmilitary-technologystrategic-autonomyNorth Korea possibly received nuclear reactor for submarine from Russia
South Korean military intelligence has reported that Russia may have supplied North Korea with nuclear reactor modules suitable for submarine propulsion, potentially including complete functioning reactors. These modules, possibly delivered in the first half of 2024, are believed to have been taken from decommissioned Russian submarines and include critical components such as reactors, turbines, and cooling systems. Since 2023, North Korea has reportedly been persistently requesting nuclear submarine technology and advanced fighter jets from Russia, with Moscow initially hesitant but seemingly agreeing to provide the submarine technology this year. Nuclear submarines, powered by pressurized water reactors, offer significant stealth advantages as they can operate submerged for long periods and are difficult to detect by conventional sonar or radar, though they emit a heat signature from their reactors. Possession of such technology would substantially enhance North Korea’s military capabilities, enabling covert operations in enemy territories and posing a serious threat to South Korea and potentially the United States. While North Korea may lack the indigenous capability to build nuclear submarines independently
energynuclear-reactorsubmarine-technologynuclear-propulsionmilitary-technologystealth-vesselsnuclear-energyUS submarines' mission-critical system to get upgrade with new contract
British company SERCO has secured a $97 million contract to continue supporting and upgrading the U.S. Navy’s Submarine High Data Rate (SubHDR) antenna systems for the next decade. These mission-critical systems enable U.S. submarines to maintain high-capacity, secure communications—including wide-band data, voice, imagery, and video conferencing—while submerged. SERCO, which has supported the SubHDR program for over 20 years, will conduct most of the maintenance, repair, and upgrade work at its Ludlow, Massachusetts facility, with additional support in Newport, Rhode Island. The SubHDR system operates in extremely high frequency (EHF) and super high frequency (SHF) bands, allowing submarines to connect via mast-mounted antennas to military satellite networks such as Milstar, the Global Broadcast Service, and the Defense Satellite Communication System. This capability ensures underwater forces remain integrated into coordinated fleet and joint task force operations. Originally developed with contributions from Raytheon, the SubHDR system has
IoTmilitary-communicationsubmarine-technologysatellite-communicationhigh-frequency-antennasdefense-technologysecure-communications20,800-ton future submarine could be survivable leg of US nuclear triad
Construction has begun on the USS Wisconsin (SSBN 827), a 20,800-ton Columbia-class ballistic missile submarine that will serve as a survivable leg of the U.S. nuclear triad. This vessel, the second of its class following the USS District of Columbia, is designed specifically for stealth and will replace the aging Ohio-class submarines. Ballistic missile submarines, often called "boomers," provide an undetectable launch platform for submarine-launched ballistic missiles, ensuring a credible second-strike capability and forming the backbone of the U.S. strategic deterrence strategy. The keel-laying ceremony took place on August 27, 2025, at General Dynamics Electric Boat’s Quonset Point facility in Rhode Island, with over 300 defense contractors and suppliers from Wisconsin supporting the submarine’s development. The USS Wisconsin will be operated by two crews, Blue and Gold, who will maintain and operate the nuclear-powered vessel to fulfill its mission of deterrence. The Columbia-class program
energynuclear-propulsionsubmarine-technologydefense-contractorsstealth-technologystrategic-deterrencenaval-engineeringRussia’s stealth nuclear submarine’s secrets out, Ukraine claims
Ukraine’s defense intelligence agency, HUR, claims to have obtained sensitive engineering documents and operational details about Russia’s newest stealth nuclear-powered submarine, the Knyaz Pozharsky, a Borei-A (Project 955A) class ballistic missile submarine commissioned in July 2025. This vessel, one of the most modern in Russia’s naval fleet, carries Bulava ballistic missiles capable of striking targets up to 8,000 km away, each missile armed with up to 10 warheads. The submarine features advanced navigation, sonar, and stealth technologies, powered by a VM-5 pressurized water reactor, and displaces 24,000 tons submerged, making it larger than the U.S. Ohio-class submarines. The leaked documents reportedly reveal detailed technical specifications, crew operations, combat layouts, and internal issues such as a deformed radio beacon, along with investigation records and daily schedules of the crew. These insights could expose vulnerabilities and shortcomings in the Borei-A class, which is
energynuclear-energysubmarine-technologymilitary-technologystealth-technologyballistic-missilesnaval-engineeringFears grow over Russian nuclear subs near epicenter of huge 8.8 quake
An 8.8-magnitude earthquake struck Russia’s Kamchatka Peninsula near Avacha Bay, raising significant safety concerns due to the proximity of Russian nuclear submarine bases. The quake’s epicenter was just 75 miles from Avacha Bay, home to the Rybachiy submarine base, which hosts advanced nuclear-powered Yasen-class cruise missile submarines and Borei-class ballistic missile submarines—key components of Russia’s strategic nuclear deterrent. While Russian authorities report no major damage or injuries, satellite imagery and local footage show collapsed buildings, damaged ports, and flooded infrastructure, prompting military analysts to scrutinize the situation closely. Experts are particularly worried about potential unseen damage to submarines, especially those undergoing maintenance with exposed hatches, as seismic activity and the resulting tsunami could have compromised their safety and operational readiness. Although a retired Russian Navy officer emphasized the robustness of these bases, built to withstand nuclear strikes, the combination of seismic waves, tsunami risks, and sensitive nuclear equipment has heightened concerns. Ev
energynuclear-energysubmarine-technologyseismic-safetydisaster-impactstrategic-defenseinfrastructure-resilienceConstruction starts on UK's biggest, most advanced nuclear submarine
Construction has commenced on the UK’s most advanced nuclear-powered attack submarine, the SSN-AUKUS, marking a significant step in the nation’s defense capabilities under the AUKUS partnership with Australia and the US. The London-based defense firm Babcock has secured key contracts to build components for this new class of conventionally-armed submarines, which are set to replace the current Astute-class vessels starting in the late 2030s. The program envisions building up to 12 SSN-AUKUS submarines, representing a major expansion of the UK’s submarine fleet and industrial capacity, particularly at the Barrow and Raynesway shipyards. Babcock’s involvement includes delivering weapon handling and launch systems, integrated tube hulls, and technical support for the Tomahawk missile, leveraging its extensive experience in submarine manufacturing and integration. The program aligns with a broader £15 billion government investment in the UK’s sovereign warhead program and aims to enhance Britain’s deterrence and defense
energynuclear-energysubmarine-technologydefense-technologyadvanced-manufacturingmilitary-materialsUK-defense-industryUS Navy’s nuclear sub uses world’s 1st reusable spy robot underwater
The US Navy has successfully conducted the first-ever operational deployment of a reusable unmanned underwater vehicle (UUV), the Yellow Moray, launched and recovered via the torpedo tube of the Virginia-class nuclear attack submarine USS Delaware. This milestone, achieved in the US European Command area, demonstrates a significant advancement in undersea warfare by integrating robotic systems with manned submarines. The Yellow Moray, based on the proven REMUS 600 platform, autonomously executes missions such as seabed mapping, mine detection, and intelligence gathering, allowing submarines to extend their operational reach into shallow or hazardous areas without endangering crew or divers. During the deployment, the USS Delaware launched and recovered the Yellow Moray three times, with missions lasting 6 to 10 hours each, proving the robot’s reusability and operational flexibility. Despite initial setbacks during early trials in Norway, where a damaged part prevented recovery, the Navy quickly repaired and redeployed the robot successfully. Additionally, Navy divers demonstrated the ability
robotunderwater-robotunmanned-underwater-vehicleUUVmilitary-roboticssubmarine-technologyreusable-robotVanguard-Class: Britain’s Silent Nuclear Guardians
The Vanguard-class nuclear submarines are central to the United Kingdom’s continuous at-sea nuclear deterrent, operating covertly beneath the ocean’s surface. Each submarine is equipped with up to 16 Trident II D5 ballistic missiles, which have long-range precision strike capabilities. At any given time, at least one Vanguard-class submarine is on active patrol, ensuring an uninterrupted and stealthy nuclear deterrent presence worldwide. Commissioned in the 1990s, the Vanguard-class remains a vital component of the UK’s national defense strategy. Although these submarines are scheduled to be replaced by the next-generation Dreadnought-class within the next decade, they continue to serve as the backbone of Britain’s nuclear deterrent, maintaining a continuous and covert operational posture across global waters.
energynuclear-energysubmarine-technologydefense-technologymilitary-materialsnuclear-deterrentballistic-missiles