Editing Trafalgar-class submarine (section)

==Characteristics==
[[File:Royal Navy Submarine HMS Turbulent with a Merlin Helicopter from HMS St Albans MOD 45153520.jpg|thumb|''Turbulent'' with a Merlin helicopter from [[Type 23 frigate]] HMS ''St Albans'', during an anti-submarine exercise in the Gulf of [[Oman]], 2011.]]
As a refinement of the preceding ''Swiftsure'' class, the design of the ''Trafalgar'' class bears some similarity, including its internal layout and the [[Rolls-Royce PWR]]1 Core 3. However some improvements over the ''Swiftsure'' class include its reduced acoustic signature, which is due to the hull being covered in [[anechoic tiles]] which are designed to absorb sound rather than reflect it, making the boats quieter and more difficult to detect with active sonar. A pumpjet propulsion system is also used from boat 2 onward, rather than a conventional propeller.<ref>{{cite web|title=Trafalgar class: Nuclear-powered attack submarine|url=http://www.military-today.com/navy/trafalgar_class.htm|archive-url=https://web.archive.org/web/20070220153136/http://military-today.com/navy/trafalgar_class.htm|url-status=usurped|archive-date=20 February 2007|website=military-today.com|access-date=4 August 2016 }}</ref> The ''Trafalgar'' class are {{convert|85.4|m|ftin|abbr=on}} long,<ref name="Steve Bush 2014"/> have a [[Beam (nautical)|beam]] of {{convert|9.8|m|ftin|abbr=on}},<ref name="Steve Bush 2014"/> a [[Draft (hull)|draught]] of {{convert|9.5|m|ftin|abbr=on}}<ref name="Steve Bush 2014"/> and a dived displacement of {{convert|5,300|tonne|LT|lk=on}}.<ref name="Steve Bush 2014"/> Each boat has a complement of 130.<ref name="Steve Bush 2014"/> Like all Royal Navy submarines, the ''Trafalgar'' class have strengthened [[Sail (submarine)|fins]] and retractable [[Diving plane|hydroplanes]], allowing them to surface through thick ice.

Four boats of the class — ''Torbay'', ''Trenchant'', ''Talent'' and ''Triumph'' — have been fitted with the [[Sonar 2076]] system. Beginning in 2014, the last four boats of the class underwent a communications package upgrade.<ref name="Steve Bush 2014"/>

The ''Trafalgar'' class is equipped with five {{convert|21|in|mm|adj=on|0}} [[torpedo tube]]s with accommodation for a mixture of up to 30 weapons:<ref name="Steve Bush 2014"/>
* [[Tomahawk (missile family)|Tomahawk]] Block IV cruise missiles
* [[Spearfish torpedo|Spearfish]] heavyweight torpedoes

The Tomahawk missiles are capable of hitting a target to within a few metres, to a range of {{convert|1000|mi|km}}.<ref>{{cite web|title=United States Navy Fact File: Tomahawk Land Attack Missile|url=http://www.navy.mil/navydata/fact_display.asp?cid=2200&tid=1300&ct=2|publisher=US Navy|access-date=27 July 2016|archive-date=27 August 2017|archive-url=https://web.archive.org/web/20170827150407/http://www.navy.mil/navydata/fact_display.asp?cid=2200&tid=1300&ct=2|url-status=dead}}</ref>

Ostensibly, the submarines use the same [[steering column]] as was used in the [[Vickers Wellington|Wellington bombers]] of the [[World War II|Second World War]].<ref>{{cite book |last1=Hennessy |first1=P. |last2=Jinks |first2=J. |name-list-style=amp |year=2016 |title=The Silent Deep |location=London |publisher=Penguin |page=16}}</ref>