VIRGINIA CLASS · SSN-774 SERIES

VIRGINIA CLASS

AMERICA'S FAST ATTACK SUBMARINE FOR THE 21ST CENTURY

The most advanced attack submarine in service. Built to replace the Los Angeles class — the class of USS Albuquerque — with 21st-century technology, stealth, and lethality.

40+ Boats Procured
66 Total Planned
10,200 Tons Block V (submerged)
S9G Life-of-Ship Reactor
$4–5B Per Boat

Origins — Why Virginia?

After the Seawolf cancellation left a gaping hole in the submarine force, the Navy needed a submarine it could afford to build in volume. Virginia was the answer.

The cancellation of 26 of the planned 29 Seawolf-class submarines in 1992 created a fundamental dilemma for the U.S. Navy. The Cold War was over, but the submarine force still needed to replace 62 aging Los Angeles-class boats over the coming decades. Submarines like USS Albuquerque (SSN-706) were extraordinarily capable — but they had been designed in an era before microprocessors, before photonics, before modular construction, and before the post-Cold War threat environment that now included littoral combat, special operations, counter-terrorism, and intelligence collection in coastal waters worldwide.

The Seawolf was unaffordable at volume. The Los Angeles class was aging out. A new design was needed — one that could be built at a rate of at least two per year, at a cost the Congress and the Navy could sustain, while delivering the core capabilities needed for the 21st century. In 1998, the program that would become the Virginia class received its first Congressional authorization.

One revolutionary aspect of the Virginia class program was immediately apparent: for the first time in U.S. submarine history, two shipyards would share production. General Dynamics Electric Boat in Groton, Connecticut — builder of every previous nuclear submarine in this analysis — would co-produce each boat with Huntington Ingalls Industries/Newport News Shipbuilding in Newport News, Virginia. Each yard builds half of every boat, then one yard assembles and delivers. This industrial innovation distributes risk, maintains two centers of submarine expertise, and provides production flexibility that a single-yard program cannot.

The design philosophy was deliberately different from both the Los Angeles and Seawolf classes. Rather than optimizing for a single threat — the Soviet submarine force in the North Atlantic, as the Los Angeles class was — Virginia was designed to excel across the full spectrum of 21st-century submarine missions:

Virginia Class Mission Profile

Anti-submarine warfare (ASW) in both open-ocean and littoral environments; anti-surface warfare (ASuW); intelligence, surveillance, and reconnaissance (ISR); mine warfare operations; special operations forces (SOF) support; and land attack via Tomahawk cruise missiles. No single previous class could perform all of these missions with equal competence. Virginia was designed from the keel up to do so.

Several technology leaps distinguished Virginia from every previous class. No optical periscopes: for the first time on a U.S. submarine, the Virginia class uses retractable photonics masts — fiber-optic camera systems with electronic image processing — instead of traditional optical periscopes that penetrate the pressure hull. This eliminates a major hull penetration, allows the mast to be used at higher speeds and greater depths than a periscope, and enables image data to be distributed throughout the boat on digital displays. Fly-by-wire ship control: digital control surfaces replaced the hydraulic and mechanical systems of prior classes. Modular construction: the hull sections are designed for future upgrades, as demonstrated by the Block III bow redesign and the Block V Virginia Payload Module insert. Life-of-ship reactor (S9G): unlike the Los Angeles class — which required a multi-year, multi-hundred-million-dollar nuclear refueling overhaul at mid-life — the S9G reactor in Virginia does not need refueling for the life of the submarine, dramatically reducing total ownership cost.

The lead boat, USS Virginia (SSN-774), was commissioned October 23, 2004 at Groton, Connecticut.

Block Evolution

Virginia class is not a static design. Each Block represents a significant set of improvements — from initial production efficiencies to the transformative Virginia Payload Module of Block V.

Block I
SSN-774 to SSN-778 · 5 Boats
USS Virginia (774) · USS Texas (775) · USS Hawaii (776) · USS North Carolina (777) · USS New Hampshire (778)
The initial production variant. 377 feet, approximately 7,800 tons submerged. Four 533mm torpedo tubes, 12 vertical launch system (VLS) tubes for Tomahawk cruise missiles, total weapons capacity approximately 26. Established the foundational design: no optical periscopes, fly-by-wire controls, photonics masts, life-of-ship reactor. Commissioned 2004–2008. Block I boats established the class in service and proved the new technologies in fleet operation.
Block II
SSN-779 to SSN-783 · 5 Boats
USS New Mexico (779) · USS Missouri (780) · USS California (781) · USS Mississippi (782) · USS Minnesota (783)
Production efficiency improvements reduced unit cost through multi-year procurement agreements. Improved sonar processing software upgraded from Block I configuration. Electronic systems upgrades implemented lessons learned from first-in-class operations. Boats commissioned 2010–2013. The procurement strategy pioneered in Block II — multi-year buy, work-share between two yards — became the template for all subsequent blocks and drove cost per boat down from Block I levels.
Block III
SSN-784 to SSN-791 · 8 Boats
USS North Dakota (784) · USS John Warner (785) · USS Illinois (786) · USS Washington (787) · USS Colorado (788) · USS Indiana (789) · USS South Dakota (790) · USS Delaware (791)
Major bow redesign — the most significant configuration change of the early blocks. The large spherical bow sonar array (inherited from Los Angeles class) was replaced with a new Large Aperture Bow (LAB) sonar system — a conformal array that covers more surface area, processes signals with modern digital algorithms, and frees up significant internal volume. That freed volume was used to add two Large-Diameter Payload Tubes (LDPT) outside the pressure hull, each capable of carrying six Tomahawk cruise missiles — adding twelve missiles to the strike payload without increasing VLS count. Boats commissioned 2014–2020.
Block IV
SSN-792 to SSN-801 · 10 Boats
USS Vermont (792) · USS Oregon (793) · USS Montana (794) · USS Hyman G. Rickover (795) · USS New Jersey (796) · USS Iowa (797) · USS Massachusetts (798) · USS Idaho (799) · USS Arkansas (800) · USS Utah (801)
Further cost reductions through a 10-boat multi-year procurement contract — the largest submarine multi-year buy in history at the time. Enhanced electronic warfare systems and upgraded combat system software. Continued improvements to acoustic quieting and sound isolation mounting systems. Block IV established the production rhythm needed to approach the two-boats-per-year goal. Boats commissioned and commissioning 2018–2025+.
Block V
SSN-802 to SSN-811 · 10 Boats · VIRGINIA PAYLOAD MODULE
USS Oklahoma (802) · USS Arizona (803) · USS Georgia (804) · USS Wisconsin (805) · USS Michigan (806) · [5 additional under construction/planned]
The most transformative Virginia upgrade: a 84-foot Virginia Payload Module (VPM) hull insert extends the boat to 461 feet — the longest Virginia variant. The VPM adds four large-diameter payload tubes, each capable of carrying seven Tomahawk cruise missiles, increasing Tomahawk capacity from approximately 37 to 65+ missiles — a 76% increase in land-attack payload. The VPM also adds capacity for large unmanned underwater vehicles (UUVs), enabling future autonomous operations. This capability was previously provided by four Ohio-class SSGNs (each carrying 154 Tomahawks); as those Cold War-era boats retire beginning in the late 2020s, Block V Virginia submarines fill the strategic land-attack gap. Displacement increases to approximately 10,200 tons submerged.
Block VI+
SSN-812+ · Under Planning
Designations and names to be determined
The next evolution of Virginia class is under development. Likely improvements include integration of artificial intelligence and machine learning for sensor fusion and threat classification; enhanced large UUV bay capability allowing more autonomous undersea operations; upgraded combat system architecture to the next generation of AN/BYG-1 successor; possible integration of hypersonic weapons delivery capability; and continued acoustic quieting improvements. Block VI will continue to extend the relevance of the Virginia design well into the 2040s and beyond.

Full Technical Specifications

The complete engineering profile of the Virginia class — America's fast-attack submarine for the 21st century.

Platform & Hull
Lead Ship USS Virginia (SSN-774)
Builders GD/Electric Boat (Groton, CT) and HII/Newport News Shipbuilding (Newport News, VA) — co-production, one boat per yard per year
Length 377 ft (Block I–IV) · 461 ft (Block V with VPM)
Beam 34 feet
Draft 32 feet
Displacement — Surfaced ~7,300 tons (Block I–IV)
Displacement — Submerged ~7,800 tons (Block I–IV) · ~10,200 tons (Block V)
Test Depth 800+ feet (classified exact figure)
Crew 15 officers, 120 enlisted (135 total)
Propulsion & Performance
Reactor One S9G pressurized-water reactor (General Electric/Bechtel) — life-of-ship, no refueling needed
Shaft Horsepower ~40,000 SHP
Propulsor Pump-jet propulsor (inherited from Seawolf class — quieter than screw)
Speed — Submerged >25 knots
Endurance 90 days (limited by stores, not fuel)
Nuclear Refueling Not required. S9G is a life-of-ship core — the submarine is decommissioned before refueling would be needed. Saves ~$500M+ per boat vs Los Angeles class mid-life ERO.
Weapons & Sensors
Torpedo Tubes 4 × 533mm (21") amidships
VLS (Block I–II) 12 vertical launch system tubes (Tomahawk)
LDPT (Block III+) 2 × Large-Diameter Payload Tubes, each carrying 6 Tomahawks (replacing spherical sonar)
VPM (Block V) 4 × large-diameter payload tubes, each carrying 7 Tomahawks = 28 additional Tomahawks from VPM alone
Total Weapons ~26 (Block I–II) · 37+ (Block III–IV) · 65+ (Block V with VPM)
Mark 48 ADCAP Advanced Capability heavyweight torpedo
Tomahawk UGM-109 TLAM (land attack) and TACTOM variants; Block V adds Tomahawk Block V (TACTOM maritime strike variant)
Harpoon UGM-84 Harpoon anti-ship missile (via torpedo tubes)
Combat System AN/BYG-1 submarine combat control system
Bow Sonar Block I–II: BQQ-10 spherical array · Block III+: Large Aperture Bow (LAB) conformal array
Wide Aperture Array WAA hull-mounted passive sonar panels on both flanks — provides bearing and range without active pinging
Towed Arrays TB-29A thin-line array; TB-16 fat-line array
Masts BVS-1 photonics masts (no optical periscopes) — high-resolution cameras on retractable masts, fiber-optic image distribution throughout boat
Program Cost
Early Procurement ~$1.8B (FY1998 procurement); ~$2.5B (Block I first boats)
Current Cost ~$3.4B (early Block III); ~$5.0B+ (current Block V)
vs Seawolf "80% of Seawolf capability at 50% of the cost" — stated design goal, approximately achieved in early blocks

Complete Boat Roster

Every Virginia-class submarine procured, under construction, and planned — organized by Block.

Hull Name Block Commissioned Home Port Status
Block I — Initial Production · 5 Boats
SSN-774 USS Virginia I October 23, 2004 Naval Station Norfolk, VA Active
SSN-775 USS Texas I September 9, 2006 Joint Base Pearl Harbor-Hickam, HI Active
SSN-776 USS Hawaii I May 4, 2007 Joint Base Pearl Harbor-Hickam, HI Active
SSN-777 USS North Carolina I May 3, 2008 Naval Station Norfolk, VA Active
SSN-778 USS New Hampshire I October 25, 2008 Naval Station Norfolk, VA Active
Block II — Production Efficiencies · 5 Boats
SSN-779 USS New Mexico II November 21, 2010 Naval Station Norfolk, VA Active
SSN-780 USS Missouri II July 30, 2011 Naval Station Norfolk, VA Active
SSN-781 USS California II October 29, 2011 Naval Station Norfolk, VA Active
SSN-782 USS Mississippi II June 2, 2012 Joint Base Pearl Harbor-Hickam, HI Active
SSN-783 USS Minnesota II September 7, 2013 Naval Station Norfolk, VA Active
Block III — Bow Redesign · Large Aperture Bow · LDPT · 8 Boats
SSN-784 USS North Dakota III October 25, 2014 Naval Station Groton, CT Active
SSN-785 USS John Warner III August 1, 2015 Naval Station Norfolk, VA Active
SSN-786 USS Illinois III October 29, 2016 Naval Station Groton, CT Active
SSN-787 USS Washington III July 29, 2017 Naval Station Groton, CT Active
SSN-788 USS Colorado III March 17, 2018 Naval Station Groton, CT Active
SSN-789 USS Indiana III September 29, 2018 Naval Station Groton, CT Active
SSN-790 USS South Dakota III February 2, 2019 Naval Station Norfolk, VA Active
SSN-791 USS Delaware III April 2, 2020 Naval Station Norfolk, VA Active
Block IV — Multi-Year Procurement · 10 Boats
SSN-792 USS Vermont IV April 18, 2020 Naval Station Groton, CT Active
SSN-793 USS Oregon IV October 31, 2020 Naval Station Groton, CT Active
SSN-794 USS Montana IV June 26, 2021 Joint Base Pearl Harbor-Hickam, HI Active
SSN-795 USS Hyman G. Rickover IV October 29, 2022 Naval Station Groton, CT Active
SSN-796 USS New Jersey IV January 28, 2023 Naval Station Norfolk, VA Active
SSN-797 USS Iowa IV July 29, 2023 Naval Station Norfolk, VA Active
SSN-798 USS Massachusetts IV April 13, 2024 Naval Station Groton, CT Active
SSN-799 USS Idaho IV 2024 TBD Active
SSN-800 USS Arkansas IV 2025 TBD Construction
SSN-801 USS Utah IV 2025 TBD Construction
Block V — Virginia Payload Module (VPM) · 461 ft · 65+ Missiles · 10 Boats
SSN-802 USS Oklahoma V 2025+ TBD Construction
SSN-803 USS Arizona V 2026+ TBD Construction
SSN-804 USS Georgia V 2026+ TBD Construction
SSN-805 USS Wisconsin V 2027+ TBD Construction
SSN-806 USS Michigan V 2027+ TBD Construction
SSN-807 to 811 Names TBD V 2028–2032 TBD Planned
Block VI+ — Future Production · Under Planning
SSN-812+ Names TBD VI+ 2033+ TBD Planned

Note on AUKUS Sales: The roster above covers boats procured for the U.S. Navy. Under the AUKUS agreement, the U.S. plans to sell 3–5 Virginia-class submarines to Australia beginning approximately FY2032. Those boats would carry Royal Australian Navy hull designators and names, not U.S. Navy SSN numbers. See the AUKUS section below for details.

AUKUS — Virginia Class Goes Global

The most significant nuclear submarine technology transfer in history — and a profound industrial challenge for American shipbuilders.

In September 2021, the United States, United Kingdom, and Australia announced AUKUS — a trilateral security partnership with a central pillar: helping Australia acquire nuclear-powered attack submarines. For Australia, a country that has never operated a nuclear-powered vessel, this is a historic capability shift — moving from the Collins-class conventionally powered diesel-electric submarines to world-class nuclear-powered fast attack boats.

The pathway is phased. In the near term (the "Optimal Pathway" announced in March 2023), the U.S. will begin rotating Virginia-class submarines to HMAS Stirling near Perth, Australia, starting with a small number of boats in the late 2020s, allowing Australian officers and crew to train and integrate with U.S. submarine operations. Then, beginning approximately FY2032, the United States plans to sell three to five Virginia-class submarines directly to Australia — transferring operational boats to the Royal Australian Navy as the U.S. builds new replacements. The first sale is targeted for FY2032, with subsequent boats following in FY2035 and FY2038.

This sale commitment has created an acute industrial problem. The U.S. Navy currently receives approximately 1.1 to 1.2 Virginia-class submarines per year from its two-yard production system. The stated goal — required to both satisfy the U.S. Navy's own force structure needs and provide AUKUS sale boats — is 2.33 boats per year. Achieving that rate requires a massive expansion of the submarine industrial base: more workers, more skilled tradespeople, more supplier capacity for specialized components including nuclear propulsion systems, reactor components, sonar arrays, weapons systems, and hundreds of sub-tier parts.

Simultaneously, the UK and Australia are jointly developing SSN-AUKUS — a new-design submarine that draws heavily on Virginia-class technology and UK Astute-class experience. SSN-AUKUS is intended to enter service with the Royal Navy in the late 2030s, and with the Royal Australian Navy in the early-to-mid 2040s. At that point, Australia's purchased Virginia-class boats would provide an interim nuclear submarine capability while SSN-AUKUS is built in Australian yards. The AUKUS submarine program is the largest defense industrial project in Australian history and one of the most complex arms transfer agreements in modern history.

FY2032
First Sale to Australia
First Virginia-class submarine transferred to the Royal Australian Navy. Australian crew will have trained for years on U.S. boats rotating through HMAS Stirling.
FY2035
Second Transfer
Second boat in the planned sale sequence. U.S. shipyards must be producing at 2.33 boats/year to meet both USN force requirements and AUKUS commitments.
2040s
SSN-AUKUS Arrives
SSN-AUKUS, jointly designed by UK and Australia with U.S. technology, enters Royal Navy service ~late 2030s and Royal Australian Navy service ~early 2040s — replacing Virginia transfers.
Industrial Challenge

Building 2.33 Submarines Per Year

The U.S. submarine industrial base — primarily Electric Boat and Newport News, plus hundreds of specialized suppliers — must nearly double its production rate to meet AUKUS commitments while keeping the U.S. Navy force structure whole. Congress has appropriated funding for shipyard workforce expansion and supplier development. Whether this rate is achievable in the required timeframe is one of the central questions of American defense industrial policy in the 2020s and 2030s.

1.1–1.2 Current Boats/Year
2.33 Required Boats/Year
3–5 Boats for Australia

Virginia vs Los Angeles — SSN-706's Successors

How Virginia class surpasses the Los Angeles class on every dimension — including the boat that USS Albuquerque herself represents.

USS Albuquerque (SSN-706) was the 19th Los Angeles-class submarine, commissioned in 1983 and decommissioned in 2017 after 33 years and 1.1 million nautical miles. The sailors who served aboard her operated one of the most proven submarine designs in history — reliable, capable, and deeply trusted by the crews who took her to every ocean.

The Virginia class is what came after. Not a replacement in spirit — the commitment and professionalism of the crew never changes — but a successor in capability. Virginia represents a generational leap across every dimension of submarine performance and sustainability.

The most consequential improvement may be invisible: the S9G life-of-ship reactor. When USS Albuquerque was about 25 years old, she went into the shipyard for a nuclear Engineered Refueling Overhaul — a multi-year, $500M+ effort to replace her reactor fuel core. Albuquerque's 2001–2003 ERO, completed in a record 20 months, still cost millions and took the boat out of the operational fleet for nearly two years. A Virginia-class boat never does this. The S9G reactor provides enough fuel for the entire 33-year life of the submarine. This saves money, saves time, and means more boats available for operations at any given moment.

The other transformative change is sensors. Los Angeles-class submarines — including USS Albuquerque — used traditional optical periscopes: physical tubes that penetrated the pressure hull, requiring the submarine to be at periscope depth and nearly stopped to use them. The Virginia class replaced optical periscopes with photonics masts: retractable sensor masts carrying high-definition cameras, infrared sensors, and laser rangefinders that transmit digital imagery via fiber optics to display screens throughout the boat. The photonics mast can be raised and lowered faster, used at higher speeds, and operated at greater depth than an optical periscope. The boat has no hull penetrations for periscopes — a major improvement in structural integrity and acoustic signature.

The weapons capacity evolution is equally striking. Los Angeles-class boats (SSN-688 through 718, including Albuquerque) carried approximately 26 weapons through four 21-inch torpedo tubes. The improved Los Angeles class (688I, SSN-719 and later) added 12 vertical launch system tubes for a total of roughly 38 weapons. Virginia Block V carries 65+ weapons including Tomahawk cruise missiles in four dedicated large-diameter payload tubes. Virginia is not just a replacement for the Los Angeles class — it is a substantially more lethal platform in every measurable dimension.

Virginia Is the Submarine SSN-706 Albuquerque's Successors Crew

The sailors who would have served aboard USS Albuquerque in 2025 instead serve aboard Virginia-class submarines. The same commitment. The same Silent Service ethos. The same dedication that earned Albuquerque a Combat Action Ribbon and four Battle Efficiency Awards. The submarine has evolved — the sailors remain the standard.

Feature Los Angeles (SSN-706 / Albuquerque) Virginia (SSN-774 class)
Length 360 ft (Flight I, SSN-706) 377 ft (I–IV) · 461 ft (Block V VPM)
Displacement ~6,927 tons submerged 7,800 t (I–IV) · 10,200 t (Block V)
Reactor S6G · 35,000 SHP · requires mid-life refueling S9G · ~40,000 SHP · life-of-ship, no refueling
Propulsor Conventional screw propeller Pump-jet (quieter, inherited from Seawolf)
Top Speed >25 knots 25+ knots (similar)
Torpedo Tubes 4 × 533mm (21") 4 × 533mm (21")
Total Weapons ~26 (no VLS on SSN-706 Flight I) 26+ (I–II) · 37+ (III–IV) · 65+ (Block V)
Periscope / Optics Traditional optical periscope (hull penetration) BVS-1 photonics masts — no periscope, no hull penetration
Ship Control Hydraulic / mechanical Digital fly-by-wire
Bow Sonar BQQ-5 spherical array Block I–II: spherical · Block III+: LAB conformal array (wider coverage, better data)
Nuclear Refueling Required ~year 25 (ERO) — Albuquerque's 2001–03 overhaul cost millions, 20 months Not required — life-of-ship S9G saves ~$500M+ per boat
Modular Design Fixed hull configuration Modular sections for future upgrades (demonstrated by Block III bow, Block V VPM)
Unit Cost ~$900M (late production) ~$3.4B (early) · ~$5B+ current · but no refueling cost
Combat Experience USS Albuquerque: Combat Action Ribbon, Kosovo 1999, 10 Tomahawks, 100% hit rate Multiple boats deployed in current operational context; combat-ready force

Weapons Capacity

Los Angeles (SSN-706, no VLS) ~26
Virginia Block I–II ~26
Virginia Block III–IV 37+
Virginia Block V (VPM) 65+

Nuclear Fuel Life (approximate)

Los Angeles S6G (before refueling) ~25 yrs
Los Angeles S6G (after refueling) ~33 yrs total
Virginia S9G (life-of-ship) 33+ yrs, no refuel
Seawolf Class — The Boat Between Them →    SSN-706 Full History →

Sources & Further Reading

Wikipedia — Virginia-class submarine

Comprehensive overview including block-by-block specifications, complete boat roster, and current operational status.

en.wikipedia.org/wiki/Virginia-class_submarine
U.S. Navy — Attack Submarine (SSN) Fact File

Official Navy specifications, procurement history, and current operational employment of the Virginia class.

navy.mil — Attack Submarine SSN Fact File
GlobalSecurity.org — SSN-774 Virginia

Detailed technical analysis, block evolution, procurement history, and cost analysis for the Virginia class program.

globalsecurity.org/military/systems/ship/ssn-774.htm
Naval Technology — Virginia Class Submarine

Systems analysis, weapons and sensor packages, and industrial base assessment for the Virginia program.

naval-technology.com/projects/virginiaclasssubmarine/
NAVSEA — Naval Sea Systems Command

Official program management office and technical authority for the Virginia class acquisition program.

navsea.navy.mil

About This Page: This reference is maintained as part of the SSN-706.com memorial site for USS Albuquerque — providing historical and technical context for the submarines that defined the era in which Albuquerque served, and the class that succeeded her. Virginia-class submarines are the direct operational heirs of the Los Angeles class tradition. Browse the full Fleet section → · Seawolf Class → · Los Angeles Class →