Trafalgar-class submarine
Class Overview
Class Type	Fleet submarine (S)
Class Name	Battle of Trafalgar
Commissioned	1983-1986
Preceded By	Swiftsure-class
Succeeded By	Astute-class
Ships of the Class:	Trafalgar Turbulent Tireless Torbay Trenchant Talent Triumph

The Trafalgar class submarines were, until the introduction of the Astute class, the Royal Navy's most advanced nuclear fleet submarines (SSNs). Image File history File links Naval_Ensign_of_the_United_Kingdom. ... Image File history File links HMS_Tireless_S-88. ... German UC-1 class World War I submarine A model of Günther Priens Unterseeboot 47 (U-47), German WWII Type VII diesel-electric hunter-killer (SSK) submarine Inside of the Argonaute, showing the typical obstructed, tiny space of a post-WWII diesel attack submarine. ... Combatants United Kingdom First French Empire, Spain Commanders The Viscount Nelson † Pierre Charles Silvestre de Villeneuve Strength 27 ships of the line 33 ships of the line Casualties 449 dead 1,214 wounded 4,480 dead 2,250 wounded 7,000 captured 21 ships captured 1 ship blown up The... The Royal Navys Swiftsure-class of nuclear fleet submarines (SSNs) is the older of the two classes of attack submarine in service with the RN. It originally contained six boats, but HMS Swiftsure was decommissioned in 1992 due to damage suffered to the pressure hull during trials. ... BAE Systems Artist Impression The Astute class submarines are the next generation nuclear attack submarines of the Royal Navy. ... HMS Trafalgar (S107) is a Trafalgar-class submarine of the Royal Navy. ... HMS Turbulent (S87) is a Trafalgar-class submarine of the Royal Navy. ... HMS Tireless (S88 117?), a Trafalgar-class submarine, is the second submarine of the Royal Navy to bear this name. ... HMS Torbay (S90) is a Trafalgar-class submarine of the Royal Navy. ... HMS Trenchant (S91) is a Trafalgar-class submarine of the Royal Navy. ... HMS Talent (S92) is a Trafalgar-class submarine of the Royal Navy. ... The current HMS Triumph (S93) is a Trafalgar-class fleet submarine. ... BAE Systems Artist Impression The Astute class submarines are the next generation nuclear attack submarines of the Royal Navy. ... The Royal Navy of the United Kingdom is the oldest of the British armed services (and is therefore the Senior Service). ...

The Trafalgar class includes seven boats: Trafalgar (S107), Turbulent (S87), Tireless (S88), Torbay (S90), Trenchant (S91), Talent (S92), and Triumph (S93). HMS Trafalgar (S107) is a Trafalgar-class submarine of the Royal Navy. ... HMS Turbulent (S87) is a Trafalgar-class submarine of the Royal Navy. ... HMS Tireless (S88 117?), a Trafalgar-class submarine, is the second submarine of the Royal Navy to bear this name. ... HMS Torbay (S90) is a Trafalgar-class submarine of the Royal Navy. ... HMS Trenchant (S91) is a Trafalgar-class submarine of the Royal Navy. ... HMS Talent (S92) is a Trafalgar-class submarine of the Royal Navy. ... The current HMS Triumph (S93) is a Trafalgar-class fleet submarine. ...

It is an attack submarine and is essentially a refinement of the Swiftsure class, designed six years later than its predecessor. The first Trafalgar class submarine was ordered on April 7, 1977 and completed in 1983. Turbulent was ordered on July 28, 1978, Tireless on July 5, 1979, Torbay on June 26, 1981, Trenchant on March 22, 1983, Talent on September 10, 1984 finally Triumph on July 3, 1986. The Royal Navys Swiftsure-class of nuclear fleet submarines (SSNs) is the older of the two classes of attack submarine in service with the RN. It originally contained six boats, but HMS Swiftsure was decommissioned in 1992 due to damage suffered to the pressure hull during trials. ... April 7 is the 97th day of the year in the Gregorian calendar (98th in leap years). ... For the album by Ash, see 1977 (album). ... July 28 is the 209th day (210th in leap years) of the year in the Gregorian Calendar, with 156 days remaining. ... 1978 (MCMLXXVIII) was a common year starting on Sunday. ... July 5 is the 186th day of the year (187th in leap years) in the Gregorian Calendar, with 179 days remaining. ... This page refers to the year 1979. ... June 26 is the 177th day of the year (178th in leap years) in the Gregorian Calendar, with 188 days remaining. ... 1981 (MCMLXXXI) was a common year starting on Thursday of the Gregorian calendar. ... March 22 is the 81st day of the year in the Gregorian Calendar (82nd in leap years). ... 1983 (MCMLXXXIII) was a common year starting on Saturday of the Gregorian calendar. ... September 10 is the 253rd day of the year (254th in leap years). ... 1984 (MCMLXXXIV) was a leap year starting on Sunday of the Gregorian calendar. ... July 3 is the 184th day of the year (185th in leap years) in the Gregorian calendar, with 181 days remaining. ... 1986 (MCMLXXXVI) was a common year starting on Wednesday of the Gregorian calendar. ...

The major improvements include a new reactor core and the Type 2020 sonar. Internal layout is almost identical to the Swiftsure, and it is only 2½ metres longer. The F70 type frigates (here, La Motte-Picquet) are fitted with VDS (Variable Depth Sonar) type DUBV43 or DUBV43C tugged sonars SONAR (SOund Navigation And Ranging) â€” or sonar â€” (the British used Anti-Submarine Detection Investigation Committee (ASDIC) until 1948) is a technique that uses sound propagation under water to navigate...

Rather than the seven/nine-bladed propeller used by the Swiftsures, Trafalgar class submarines use pump-jet propulsion - a high-pitch, low-revolution propeller which is much quieter but much heavier than conventional propeller designs. Development of this system was not complete in time for installation in the class's name-ship vessel, HMS Trafalgar, and so the pump-jet was first used in the second in the class, HMS Turbulent. The hull is also covered in anechoic tiles which are designed to absorb sound rather than reflect it, making the boats more difficult to detect with active sonar. To meet Wikipedias quality standards, this article or section may require cleanup. ... Categories: Marine propulsion | Stub ...

The Trafalgar class have strengthened fins and retractable hydroplanes, allowing them to surface through thick ice.

In 1993 Triumph sailed to Australia, covering a distance of 41,000 miles whilst submerged and without any forward support. This marked the longest solo deployment by any nuclear submarine.

The Trafalgar class was to be replaced by the Future Attack Submarine (FASM), however this project was effectively cancelled in 2001 and replaced by the Maritime Underwater Future Capability. It seems likely that the Astute class will replace the Trafalgar class as well as the Swiftsure class. Maritime Underwater Future Capability is the designation for UK Ministry of Defence studies to replace the Royal Navys Trafalgar class submarines and follow on from the Astute class. ...

Service Problems

Despite being regarded as sophisticated designs, the Trafalgar class have suffered from a number of technical difficulties. In 1998 Trenchant experienced a steam leak, forcing the crew to shut down the nuclear reactor. In 2000 cracks were discovered in the reactor cooling pipes of Tireless, forcing her to proceed to Gibraltar on diesel power. In August 2000 it was revealed that with Tireless still at Gibraltar, Torbay, Turbulent, Trenchant and Talent were at Devonport for refit or repair and with Trafalgar undergoing sea trials, only one boat - Triumph - was fully operational. By 2005 refits had reportedly corrected these problems. Devonport in 1909, courtesy WW1 Archive Devonport Dockyard and the Hamoaze from the Rame Peninsula, Cornwall Her Majestys Naval Base (HMNB) Devonport (HMS Drake), commonly called Devonport Dockyard, is a major Royal Navy base located in Devonport, in the west of the city of Plymouth in Devon. ...

General characteristics

• Builder: Vickers Shipbuilding and Engineering Ltd
• Displacement: 4,750 tons surfaced, 5,208 tons submerged
• Length: 85.4 meters
• Beam: 9.8 meters
• Draught: 9.5 meters
• Complement: 18 officers, 112 ratings
• Propulsion: 1 x Rolls-Royce PWR1 pressurized water cooled nuclear reactor delivering 15,000 shp for 30 kt max
• Armament: five tubes capable of firing:
  • Spearfish torpedoes
  • Tomahawk missiles

Tigerfish and Harpoons are no longer used by any submarine class within the Royal Navy. Vickers Shipbuilding and Engineering Ltd (VSEL) is based at Barrow-in-Furness, Cumbria, England. ... The Rolls-Royce pressurised water reactor (PWR) series has powered British nuclear submarines since the Valiant class, commissioned in 1966. ... Pressurized water reactors (PWRs) are generation II nuclear power reactors that use water under high pressure as coolant and neutron moderator. ... The Spearfish torpedo is the heavy Acoustic homing torpedo used by the submarines of the Royal Navy. ... A Tomahawk cruise missile The Tomahawk Land Attack Missile (TLAM) is a long-range, all-weather, subsonic cruise missile with stubby wings. ...

• Sensors:
  • sonar (bow, flank, active intercept, and towed arrays)
  • periscopes (attack and search)
  • collision avoidance radar
• Command System:
  • SMCS
  • SMCS-NG (based on Microsoft Windows) from 2004 onwards

The F70 type frigates (here, La Motte-Picquet) are fitted with VDS (Variable Depth Sonar) type DUBV43 or DUBV43C tugged sonars SONAR (SOund Navigation And Ranging) â€” or sonar â€” (the British used Anti-Submarine Detection Investigation Committee (ASDIC) until 1948) is a technique that uses sound propagation under water to navigate... Search and attack periscopes of a French-built Scorpène class submarine. ... This long range RADAR antenna, known as ALTAIR, is used to detect and track space objects in conjunction with ABM testing at the Ronald Reagan Test Site on the Kwajalein atoll[1]. RADAR is a system that uses radio waves to determine and map the location, direction, and/or speed... SMCS, the Submarine Command System, was first created for the Royal Navys Vanguard class submarines. ...

External links

• Royal Navy official site
• Report on 2003 upgrade of Torbay
• Abridged history of each boat