Summary: The Royal Navy is completing final sea tests this week for the first vessel in a new class of highly advanced attack submarines.
Development: This is the first submarine launched by the Royal Navy since the HMS Vengeance in 1998. The new line of Astute-class submarines is set to replace Great Britain’s entire attack submarine fleet. HMS Astute will become fully operational in November and will replace the HMS Trafalgar. Her sister ships-the Ambush, Artful and Audacious-are set to be launched before the end of 2011. An additional three submarines have been planned for future construction. Once deployed, it will be one of the most advanced submarines in existence, rivaled only by the United States’ Virginia-class attack submarines.
Analysis: The HMS Astute, the first of seven planned Astute-class nuclear attack submarines, is Great Britain’s largest and most advanced submarine. The Astute is designed for both blue-water and brown-water operations and is the stealthiest submarine in the Royal Navy. The Astute-class employs advanced technology that will make it among the most deadly submarines in the ocean. The sub carries four modern SONAR arrays, which will be powerful enough to detect large surface ships up to 3,000 nautical miles away and vessels attempting to follow it. In the past, British submarines used unreliable rear-facing SONAR which could be hindered by the submarine’s own propeller. The Astute-class will be the first to use advanced towed arrays. In addition, the traditional periscopes have been replaced with thermal imaging systems capable of delivering 360-degree views of the sea in only 6 seconds above the surface.
The Astute will carry a lethal array of weapons, including Tomahawk land-attack missiles, Spearfish torpedoes, and Submarine-Launched Harpoon missiles. A total of 48 assorted missiles can be loaded onto the submarine at a time. By comparison, the United States’ Virginia-class attack submarine carries 40 missiles. There is also some speculation that later Astute-class ships will serve as replacements for the Royal Navy’s Trident ballistic missile submarines and will contain up to 4 ballistic missile silos, but these reports are unconfirmed by the Royal Navy.
The Astute-class will also be among the quietest submarines in operation. Preliminary reports from the Royal Navy indicate that while traveling at its top speed of 30 knots, the 7800 ton submarine will have the SONAR signature of a baby dolphin. Unconfirmed reports also claim the submarine may be equipped with an underwater launch bay for undersea commando operations.
The submarine is designed to carry out long-term patrols. Astute-class submarines will have the ability to remain submerged for up to 70 days, and its nuclear reactor will last 25 years before refueling.
As a traditional world naval power, the Royal Navy is taking steps to continue dominance of the seas. The US and UK have begun launching several brown-water undersea vessels in anticipation of future naval combat in littoral waters. Brown-water submarines are often a rare addition to a navy, and even fewer of those vessels are nuclear powered. They are configured for service in shallow, littoral seas like those in the Baltic, the Artic littoral, and the waters off the China coast. In comparison, Chinese and Russian brown-water submarines are primarily diesel-powered, making them less effective as they can only be submerged for a short amount of time, carry fewer weapons, and are much louder than their nuclear counterparts. The addition of the nuclear-powered littoral submarine to the modern British navy is a shift in the balance of power in the international community. These publicized additions could be met with a naval arms race for supremacy of European waters. With Russian ballistic missile submarine patrols increasing their frequency over the past year, tensions between the two nations could escalate as they vie for control of the seas.
[Andrew Schroeder, Matt Whitney]