|Arthur Dominic Villasanta |||Oct 17, 2016 05:43 PM EDT|
(Photo : Royal Navy) Royal Navy Dreadnought-class submarine (concept drawing).
The United Kingdom has approved an initial outlay of $1.6 billion to produce its new Successor-class ballistic missile submarines (SSBN) that are far stealthier than the Royal Navy's current SSBN and also have superior crew accommodations.
That investment will cover long-lead items and prepare the shipyard at Barrow-in-Furness to build these massive subs.
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"Britain's ballistic missile submarines are the ultimate guarantee of our nation's safety -- we use them every day to deter the most extreme threats," said Michael Fallon, Secretary of State for Defense.
"We cannot know what new dangers we might face in the 2030s, 2040s and 2050s so we are acting now to replace them."
The four boats in the Successor-class, which will have a service life of 25 years, will replace the Vanguard-class that entered service with the Royal Navy in the 1990s. Replacing the Vanguards is necessary if the Royal Navy is to maintain a "continuous at-sea deterrent" (CASD), the principle of operation behind the Trident system.
The new boats will be the largest submarines ever built for the Royal Navy. They will displace 16,000 metric tons and will be 153 meters in length. They Successors, however, will only mount 12 missile tubes rather than the 16 on the Vanguards.
The huge SSBNs, also referred to in submariner lingo as boomers, are expected to enter Royal Navy in the 2030s. They will also share technology with their U.S. Navy opposite numbers (the Columbia-class Ohio Replacement Program SSBNs) such as a common missile compartment (CMC) design.
Deployed with the U.S. Navy and the Royal Navy, the Trident II Strategic Weapons System was first deployed in March 1990 and remains in service. Trident II is an improved SLBM with greater accuracy, payload, and range than the Trident C-4.
Trident II's increased payload allows nuclear deterrence to be accomplished with fewer submarines. Its high accuracy (a circular error probability of only 90 meters after traveling 12,000 km) approaches that of land-based missiles allows it to be used as a first strike weapon.
Trident II missiles are carried by 14 U.S. Navy Ohio and four Royal Navy Vanguard-class SSBNs, with 24 missiles on each Ohio-class and 16 missiles on each Vanguard-class. Each missile can carry from 8 to 12 thermonuclear MIRV (Multiple Independently Targetable re-entry Vehicle); a W88 Maneuverable Re-entry Vehicle or W76 thermonuclear warhead.
The large size of the Successors will make possible better creature comforts such as separate berthing for female crew members; a sickbay with a doctor and a gym. The boats' larger size also leads to enhanced stealth since larger submarines are inherently quieter than smaller ones.
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