Uppsala Class

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Uppsala Class Atack Submarine
Uppsala class 01.jpg
Uppsala Class Atack Submarine
Career Flag of Kalmar Union.png
Nationality: Skandinavia
Operated by: Skandinavia
Builder: Saab Kockums
Ordered: First of class: April 1996
Launched: First of class: November 1999
Commissioned: First of class: April 2001
Status: In Service
General characteristics
Displacement: Surface: 3,740 tons
Submerged: 4,115 tons
Length: 87.7 m
Beam: 12.80 m
Draft: 6.15 m
Power: 18MW
Propulsion: 10 MW ASEA permanent magnet motor with NAtech Marine Pump-jet powered by:
  • Mixed system of lithium ion batteries and NAtech Hyrdrogen Fuel Cells when submerged
  • Volvo Aero Milti-Gas Turbine in surface
Speed: Surface: 27 kn
Submerged: 31 kn
Range: 17,700 nautical miles at 23 knots
Complement: 60 + 14 special forces
Armament: Sensors
1 x Saab 9LV CMS Combat Management System
1 x Saab 9LV FCS Fire Control System
1 x Saab EOS 500 Electro Optical Fire Control
1 x TERMA SCANTER 4100 Surveillance Radar
1 x Saab SSSu 11 Integrated sonar sensor suite
Electronic warfare
1 x Saab SME-200 Tactical EMS / ELINT
Decoys
1 x TERMA Loki submarine torpedo countermeasure
Armament
8 bow 21 in (533 mm) torpedo tubes (2 rear) with 32 mixed capacity of the following

Naval mines
6 vertical cells for Saab Dynamics RBS 23

The Uppsala class is a class of 10 conventional (non-nuclear) propulsion attack submarines in service in the Sjøforsvaret. Because of the innovative nature of their propulsion system and the quality of their control and armament systems, it is a class of attack submarines that surpasses in performance any submarine of non-nuclear propulsion and many of nuclear one.

Power generation & propulsion[edit | edit source]

Uppsala Class Pump-jet

Submarines of the Uppsala Class employ a revolutionary new propulsion system. They are the first submarines in active service to have a mixed system of gas turbine located on the "bulb" on top of the fin, lithium ion batteries and fuel cells. The gas turbines allow them to reach speeds in surface or semi-submerged mode much above those of any other submarine, while the system of batteries and fuel cells endows them with a capacity and endurance surpassed only by some nuclear submarines. This state-of-the-art propulsion system is the result of years of research and collaboration between several companies and provides the Sjøforsvaret with a top underwater capability.

In the center of this innovative system is a 10 MW ASEA permanent magnet motor connected to a NAtech Marine Pump-jet. Permanent magnet propulsion motor technology can replace the reduction gears and significantly reduce the running sound to the lowest possible level, what attached to a Pump-jet makes the submarine one of the quietest in the world.

When operating in the fast transit mode, the boat operates as a semi-submersible with the bulb positioned above the surface. The gas turbines burn hydrogen or natural gas with air inducted through an extendable mast and the energy produced by the gas turbine is used to power the permanent magnet motor and to recharge lithium ion batteries. To avoid risks, the fuel is stored outside the main compartment in tanks located between the outer and the inner hull.

For slow covert transit requirements or on station, the batteries and fuel cells are used in fully Air Independent Propulsion (AIP) mode. Oxygen tanks are located betwenn the outer and the inner hull.

Electronic systems[edit | edit source]

One of the main design premises was the need to mount Skandinavian made electronic systems in order to full integration with other Forsvaret systems and satellite net.

Sensors

  • 1 x Saab 9LV CMS Combat Management System
  • 1 x Saab 9LV FCS Fire Control System
  • 1 x Saab EOS 500 Electro Optical Fire Control
  • 1 x TERMA SCANTER 4100 Surveillance Radar
  • 1 x Saab SSSu 11 Integrated sonar sensor suite

Electronic warfare

  • 1 x Saab SME-200 Tactical EMS / ELINT

Decoys

  • 1 x TERMA Loki submarine torpedo countermeasure

Armament[edit | edit source]

Upgrading program[edit | edit source]

In April 2016, the Navy ordered the construction of 12 new units to replace the Ula Class and provide itself with greater submarine capacity. These new submarines incorporate some improvements in their combat systems as well as a better optimization of the propulsion systems. Throughout the 2020-2024 period, it is expected that all class submarines built in the first phase will be upgraded with these new systems.

List of ships[edit | edit source]

# Name Ordered Launched Commissioned
S-401 KSS Uppsala April 1996 November 1999 April 2001
S-402 KSS Södermanland April 1996 February 2000 November 2001
S-403 KSS Kalmar April 1996 October 2000 April 2002
S-404 KSS Gotland April 1996 May 2001 December 2002
S-405 KSS Västmanland April 1996 December 2001 August 2003
S-406 KSS Jämtland April 1996 July 2003 February 2005
S-407 KSS Kronoberg April 1996 January 2005 August 2006
S-408 KSS Norrbotten April 1996 July 2006 February 2008
S-409 KSS Dalarna April 1996 January 2007 August 2009
S-410 KSS Örebro April 1996 July 2007 February 2010
S-411 KSS Västerbotten April 2016 October 2017 April 2019
S-412 KSS Jönköping April 2016 May 2018 December 2019
S-413 KSS Blekinge April 2016 December 2018 August 2020
S-414 KSS Gävleborg April 2016 July 2020 February 2021
S-415 KSS Västra Götaland April 2016 January 2021 August 2022
S-416 KSS Värmland April 2016 July 2021 February 2023
S-417 KSS Stockholm April 2016 January 2022 August 2024
S-418 KSS Västernorrland April 2016 July 2023 November 2024