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Virginia Block IV  
Initial Operational Capability (IOC): 18 April 2020
Total Production: 10
Unitary Cost: USD$1.8 billion
Also Known As: SSN 792 USS Vermont
Origin: United States of America
Corporations: General Dynamics Electric Boat and Newport News Shipbuilding
Parent System: SSN 774 Virginia
Initial Operational Capability (IOC): 23 October 2004
Total Production: 38
Total Cost: USD$93 billion
Family Members: SSN 774 Virginia, Virginia Block II, Virginia Block III and Virginia Block V
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Description: The SSN 774 Virginia are the next generation US Navy (USN) nuclear-powered fast attack submarines designed to meet the 21st century submarine warfare requirements. The Virginia class ships are intended as the replacement for existing Los Angeles class attack submarines. These submarines feature advanced technologies to achieve improved firepower, maneuverability, endurance and emphasizing integrated acoustic and non-acoustic stealth. They are able to stay submerged for up to three months at a time. Powered by a nuclear pressurized water reactor (PWR) can achieve a top speed submerged of 25 knots with a maximum depth of 500 meters. The US Navy plans call for the procurement of up to 30 Virginia class submarines starting in 2004.

The submarine high data rate (Sub HDR) multi-band satellite communication (SATCOM) system is provided by Raytheon. The Sub HDR connects submarines to the above sea world by raising a mast-mounted antenna above the ocean's surface while the boat remains stealthy and submerged at periscope depth. It supports secure data, voice, multimedia, imagery and video teleconferencing via the Global Broadcast Service, the Milstar satellite constellation, and the Defense Satellite Communication System. The FORCEnet capability being inducted to existing and on order submarines allows to communicate using IP/Internet Protocol connectivity. It allows US submarine fleet to quickly and easily share and exchange information for military purposes, while submarine crew can connect to their families back home via email, web browsing, file transfer, etc.

Virginia nuclear submarines are used to seek and destroy enemy submarines and surface ships, intelligence collection, special forces delivery, and land-attack operations using Tactical Tomahawk missiles launched from 12 vertical launch system (VLS) tubes and four 533mm torpedo tubes. They perform the full-spectrum of open-ocean, blue water missions as well as littoral warfare missions. The SSN 774 Virginia class submarines goal is to maintain USN undersea superiority well into the 21st century. In addition to current torpedoes, mines and missiles these submarines will be armed with unmanned underwater vehicles (UUV). Virginia class boats can carry the Advanced SEAL Delivery System (ASDS) underwater vehicle for special forces infiltration.

The US Navy's plans call for the procurement of 12 Virginia Block IV submarines between 2020 and 2025 with a $17 billion contract already awarded for 10 boats through 2023/2024. Finally, the Block IV program includes 10 boats.

Virginia Block IV Specifications

Crew: 134
Number of Vertical Launch Systems: 2
Number of Weapons: 38
Torpedo Tubes: 4
Beam: 10.4 meter (34.0 foot)
Draft: 9.75 meter (32.0 foot)
Length: 115 meter (377 foot)
Max Operating Depth: 500 meter (1,640 foot)
Top Speed Submerged: 25 knot (12.9 mps)
Displacement Submerged: 7,835 ton
CEP: Circular Error Probable
Meters (m)   Kilometers (km)   Nautic Miles (nm)   Inch (in)   Yard (yd)   Foot (ft)   Millimeter (mm)
Pound (lb)   Kilogram (kg)   kN (KiloNewton)   Ton (t)
Meters per Second (mps)   Kilometers per Hour (kph)   Knot (kt)   Miles per Hour (mph)
Liter (l)   Galon (gl)
Year (yr)   Minutes (min)   Second (sec)
Shaft-Horse-Power (shp)

Virginia Block IV News

There are 5 news between
21 Jun 2011 and 18 Apr 2020
Saturday, April 18, 2020US Navy Commissions USS Vermont First Virginia Block IV Submarine
Wednesday, July 6, 2016General Dynamics Electric Boat Awarded Contract for US Navy Virginia Payload Module Development
Monday, April 28, 2014General Dynamics Electric Boat Awarded Block IV Contract for 10 Virginia-Class Submarines
Friday, January 4, 2013US Navy Awards Contracts to Electric Boat for Ohio-replacement and Virginia Submarines
Tuesday, June 21, 2011US Navy Selects Lockheed Martin to Provide Submarine Sonar Technology Upgrade

Operators & Related Equipment

United States of America10
Apr 20201

Grand Total 101
Auxiliary Vessels
Defensive Weapons
Mark 48 ADCAPx26
Mark 48 CBASSx26
Offensive Weapons
UGM-84L Harpoon
Tactical Tomahawkx12
Protection Systems
Sensor Systems
Sub HDRx2

Virginia Block IV Ship Listing

SerialNameStatusLaunch DateCommissionDecommission
SSN 792 USS Vermont20 Oct 201818 Apr 2020-
SSN 793 USS Oregon5 Oct 20192021-
SSN 794 USS Montana-2021-
SSN 795 USS Hyman G. Rickover-2021-
SSN 796 USS New Jersey-2022-
SSN 797 USS Iowa-2022-
SSN 798 Massachusetts-2023-
SSN 799 USS Idaho-2023-
SSN 800 USS Arkansas-2023-
SSN 801 USS Utah-2024-

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