Key Points and Summary – The Royal Navy’s four Vanguard-class submarines are the cornerstone of the United Kingdom’s strategic nuclear deterrent.
-Commissioned in the 1990s, these massive 16,000-ton “boomers” are each armed with 16 Trident II D5 nuclear-tipped ballistic missiles, ensuring a continuous at-sea deterrence posture.
-Powered by a Rolls-Royce PWR 2 nuclear reactor, they have virtually unlimited range.
-Despite their formidable power and a history of upgrades to their sonar and reactor cores, the Vanguard-class boats are aging and are scheduled to be replaced by the new Dreadnought-class submarines beginning in the early 2030s.
Don’t Leave the British Royal Navy’s Vanguard-class Boomer Subs Out of the Fight
The British Vanguard-class submarines were a marvel at the end of the Cold War. Built during the mid-to-late 1980s and early 1990s, they remain an impressive and powerful deterrent for the Royal Navy.
The Vanguard-class are strategic ‘boomers’ that can deliver nuclear Trident II D5 missiles. But since the Vanguard-class submarines are so old, they will be replaced by the new Dreadnought-class in the early 2030s.
History of the Vanguard-class
The four Vanguard-class boomers started their respectable service record in the mid to late 1990s. The HMS Vanguard was the first submarine of the class. Its keel was laid down in 1986, and it was commissioned in 1993. The last boat of the class, the HMS Vengeance, was launched in 1998 and commissioned in 1999.
The Vanguard submarines were constructed by Vickers Shipbuilding and Engineering Limited (now BAE Systems Marine) at Barrow-in-Furness. They displace nearly 16,000 tons when submerged, making them the largest submarines ever made by the United Kingdom.
Built for the Cold War and Ever-Vigilant When It Ended
The four Vanguard subs formed a group called the First Submarine Squadron. They were based at Clyde Submarine Base in Faslane. The first patrol with Trident missiles took place in 1994. This had the Royal Navy excited about the future of the Vanguard-class.
Britain wanted a modern sub that could launch nuclear missiles anytime, anywhere on a moment’s notice. This occurred at the end of the Cold War, and future undersea warfare strategies were evolving after the Soviet menace had ended. The British still wanted to lead the world in nuclear-powered boomers to give the country a leg up in strategic delivery systems, and the Vanguard-class became the prime go-to nuclear option for the government.
Proudly Featuring the Trident II Nuclear Missile
The Vanguard-class is based on the Resolution-class submarine of the 1960s. The Resolution-class featured 16 UGM-27 Polaris missiles for each boat. By 1982, the Americans had designed the Trident II,s and the British were glad to upgrade.
In 1998, the HMS Vanguard became the first SSBN to deploy to Gibraltar. Unfortunately, in 2009, the HMS Vanguard collided with the French strategic submarine Le Triomphant, resulting in only minor damage.
Be Careful When the Leader of the Nation Visits
Prime Minister David Cameron visited the HMS Victorious to commemorate the 100th patrol of the Vanguard-class in 2013. This event wasn’t easy. Cameron had to be delivered to the submarine by helicopter, but once he was on board, the prime minister was impressed. The sailors were highly professional, and Cameron assuredly thought that personnel on a nuclear submarine had difficult and dangerous jobs.
Mid-Life Service Improvements
The Vanguard-class boats require periodic evaluation of their Trident missiles, with 10 successful tests conducted from 1994 to 2012. The subs also need mid-life maintenance, upgrades, and extended service life periods. The reactors were re-fueled and enhancements were added to the subs’ sonar and electronic warfare systems between 2005 and 2023.
“During their first overhaul, all submarines were fitted with a new long-life reactor core [Core H] at the newly constructed D154 refueling and defueling facility at Devonport. The sonar system modernization included an open architecture upgrade comparable to the US Navy’s Acoustic Rapid COTS Insertion [ARCI] program. Additional upgrades included the installation of the Submarine Acoustic Warfare Control System [SAWCS] and enhancements to the UAP-3 radar electronic support measures [ESM],” according to NulcearCompanion.com.
The Vanguards can fire 16 Trident II D5 nuclear missiles. These have up to 12 multiple independently targeted re-entry vehicles (MIRVs). The Trident II D5 is a three-stage solid-fueled missile. The Mark 6 guidance system makes them highly accurate.
The Vanguard-class subs sport four 533mm torpedo tubes that can launch heavyweight wire-guided Tigerfish and Spearfish torpedoes. The Tigerfish can hit targets up to 18 miles away. The Spearfish has a top range of 40 miles.
The Vanguard-class is blessed with an impressive nuclear-propulsion system. “The Vanguard class submarine’s main nuclear-powered propulsion system is based on the second-generation Rolls-Royce PWR 2, which was developed specifically for the Vanguard Class. Current generations of PWR allow submarines to circumnavigate the world about 20 times, whereas the latest development of PWR would allow circumnavigation 40 times without refueling,” according to Naval-Technology.com.
The Vanguard-class is still relevant today. It’s about that time for the current British Prime Minister, Keir Starmer, to make a visit to one. He would be impressed by the combat power of the Vanguard-class. They were made for the Cold War, but still give the British an important nuclear deterrent against potential Russian nuclear aggression.
The British people can sleep well knowing that the Vanguard-class is patrolling the high seas, ready to launch its missiles at a moment’s notice. They rarely disclose their locations, running silent and deep for extended periods.
However, the Vanguards are approaching the end of their service life and are likely to have only six to nine years remaining until they are replaced. The Royal Navy sailors will have fond memories of serving on the Vanguards, knowing they have played a significant role in keeping the United Kingdom’s adversaries at bay and maintaining vigilance and strategic deterrence for decades.
About the Author: Dr. Brent M. Eastwood
Brent M. Eastwood, PhD is the author of Don’t Turn Your Back On the World: a Conservative Foreign Policy and Humans, Machines, and Data: Future Trends in Warfare plus two other books. Brent was the founder and CEO of a tech firm that predicted world events using artificial intelligence. He served as a legislative fellow for U.S. Senator Tim Scott and advised the senator on defense and foreign policy issues. He has taught at American University, George Washington University, and George Mason University. Brent is a former U.S. Army Infantry officer. He can be followed on X @BMEastwood.
