Vertical launching system explained

A vertical launching system (VLS) is an advanced system for holding and firing missiles on mobile naval platforms, such as surface ships and submarines. Each vertical launch system consists of a number of cells, which can hold one or more missiles ready for firing. Typically, each cell can hold a number of different types of missiles, allowing the ship flexibility to load the best set for any given mission. Further, when new missiles are developed, they are typically fitted to the existing vertical launch systems of that nation, allowing existing ships to use new types of missiles without expensive rework. When the command is given, the missile flies straight up far enough to clear the cell and the ship, then turns onto the desired course.

A VLS allows surface combatants to have a greater number of weapons ready for firing at any given time compared to older launching systems such as the Mark 13 single-arm and Mark 26 twin-arm launchers, which were fed from behind by a magazine below the main deck. In addition to greater firepower, VLS is much more damage tolerant and reliable than the previous systems and has a lower radar cross-section (RCS). The U.S. Navy now relies exclusively on VLS for its guided missile destroyers and cruisers.

The most widespread VLS in the world is the Mark 41, developed by the United States Navy. More than 11,000 Mark 41 VLS missile cells have been delivered, or are on order, for use on 186 ships across 19 ship classes, in 11 navies around the world. This system currently serves with the US Navy as well as the Australian, Danish, Dutch, German, Japanese, Norwegian, South Korean, Spanish, and Turkish navies, while others like the Greek Navy preferred the similar Mark 48 system.[1]

The 3S-14 VLS was developed in Russia and is used in sea-based as well as land-based TEL systems such as the S-400 missile system.

The advanced Mark 57 VLS is used on the . The older Mark 13 and Mark 26 systems remain in service on ships that were sold to other countries such as Taiwan and Poland.

When installed on an SSN (nuclear-powered attack submarine), a VLS allows a greater number and variety of weapons to be deployed, compared with using only torpedo tubes.

Launch type

A vertical launch system can be either hot launch, where the missile ignites in the cell, or cold launch, where the missile is expelled by gas produced by a gas generator which is not part of the missile itself, and then the missile ignites. "Cold" means relatively cold compared with rocket engine exhaust. A hot launch system does not require an ejection mechanism but does require some way of disposing of the missile's exhaust and heat as it departs the cell. If the missile ignites in a cell without an ejection mechanism, the cell must withstand the tremendous heat generated without igniting missiles in adjacent cells.

Hot launch

An advantage of a hot-launch system is that the missile propels itself out of the launching cell using its own engine, which eliminates the need for a separate system to eject the missile from the launching tube. This potentially makes a hot-launch system relatively light, small, and economical to develop and produce, particularly when designed around smaller missiles. A potential disadvantage is that a malfunctioning missile could destroy the launch tube. American surface-ship VLSs have missile cells arranged in a grid with one lid per cell and are "hot launch" systems. The engine ignites within the cell during the launch and so requires a way of venting rocket exhaust. France, Italy and Britain use a similar hot-launching Sylver system in PAAMS.

Cold launch

The advantage of the cold-launch system is in its safety: if a missile engine malfunctions during launch, the cold-launch system can eject the missile, reducing or eliminating the threat. For this reason, Russian VLSs are often designed with a slant so that a malfunctioning missile will land in the water instead of on the ship's deck. As missile size grows, the benefits of ejection launching increase. Above a certain size, a missile booster cannot be safely ignited within the confines of a ship's hull. Most modern ICBMs and SLBMs are cold-launched. Russia produces both grid systems and a revolver arrangement with more than one missile per lid for its cold launch system. Russia also uses a cold launch system for some of its vertical launch missile systems, e.g., the Tor missile system.

The UK's Common Anti-Air Modular Missile (CAMM) family of missiles utilises a similar cold-launching system, referred to as soft-vertical-launch, and actively markets the advantages of the system. Soft-launch provides the missile with a reduce interception rate allowing for shorter ranged engagements, reduces the IR signature of the ship and the obscurant of visibility by rendering the ship in efflux for several minutes; and most notably, the lack of hot efflux and reduced stress on the ship's structure allows for a much greater choice of launch systems, such as the lighter Mushroom Farm launcher whilst also still enabling installation into the heavier Mark 41 in a quad-pack or dual-packed configuration (4 or 2 missiles per cell) for a costly, but more space efficient option.[2] [3] [4] [5]

Concentric canister launch

Some warships of China's People's Liberation Army Navy use a concentric canister launch (CCL) system that can launch using both hot and cold methods in the cell module, onboard the Type 052D destroyer and the Type 055 destroyer.[6] The universal launch system is offered for export.[7]

Older Chinese ships use single launch system: Type 052C destroyers use a cold launch system, while Type 054A frigates use a hot launch system.[8]

Other platforms

Transporter erector launchers are wheeled or tracked land vehicles for the launch of surface-to-air and surface-to-surface missiles. In most systems the missiles are transported in a horizontal out-of-battery configuration: in order to fire, the vehicle must stop and the transport/launch tube must be raised to the vertical before firing.

BAE Systems has filed patents relating to the use of Vertical Launch missiles from modified passenger aircraft.[9]

Systems in use by states

NATO

In 2021, the Centre for Military Studies published the total number of VLS cells in use with fourteen NATO navies. The results are displayed below.

-- Do not edit the table except to match the source. -->+ Vertical Launch System Cells of 14 NATO Navies in 2020 (Centre for Military Studies)[10]
Country Ship classes and approx. number of VLS cells Total Strike Length VLS cells for Sea-Launched Cruise Missiles (SLCM)
  • 73 × 90/96
  • 13 × 122
  • 2 × 80
8,646 8,700+ arsenal of SLCM / Not included are VLS and BFM on submarines.
Europe total - 2,392 688
672 -
384 6 × 16 = 96 SLCM deployed on Aquitaine-class
  • 2 × 36
  • 3 × 56
240 3 x 32 = 96 / No SLCM
  • 5 × 48
240 5 × 48 = 240 / No SLCM
224 No SLCM
  • 12 × 16
192 -
  • 4 × 40
  • 2 × 16
192 4 × 40 = 160 / No SLCM
  • 4 × 16
  • 3 × 32
160 3 × 32 = 96 / No SLCM
144 -
128 -
  • 3 × 8, 1 × 16
40 -
  • 2 × 16
32 -
  • 2 × 16
32 -
  • 2 × 8 MMPV 80 corvette
16 -
Note: The above table does not include NATO navies which do not possess vertical launching systems, namely Albania, Croatia, Estonia, Iceland, Latvia, Lithuania, North Macedonia, Poland, Romania and Slovenia.

Other

Surface
Surface
Submarine
Surface
Submarine
Surface
Submarine

See also

External links

Notes and References

  1. Web site: Preview ofTable of contents . Naval Swiss Army Knife: MK 41 Vertical Missile Launch Systems (VLS) . Defenseindustrydaily.com . 2016-07-08 . 2016-12-29 . https://web.archive.org/web/20161230155943/https://www.defenseindustrydaily.com/MK-41-Naval-Vertical-Missile-Launch-Systems-Delivered-Supported-updated-02139/#more-2139 . 2016-12-30 . live .
  2. Głębocki . Robert . Jacewicz . Mariusz . 2018-10-20 . Simulation study of a missile cold launch system . Journal of Theoretical and Applied Mechanics . 56 . 4 . 901–913 . 10.15632/jtam-pl.56.4.901 . 1429-2955. free .
  3. Web site: 2019-06-04 . From Sea Wolf to Sea Ceptor – the Royal Navy's defensive shield Navy Lookout . 2023-11-10 . www.navylookout.com . en-GB.
  4. Web site: SEA CEPTOR FORCE PROTECTION, Maritime Superiority . 2023-11-10 . MBDA . en-US.
  5. Web site: CAMM FORCE PROTECTION, Ground Based Air Defence . 2023-11-10 . MBDA . en-US.
  6. Web site: Shots of cold and hot launches of 052D destroyer unveiled. China-arms. 19 February 2020.
  7. Web site: China Reveals Universal Ship-borne Vertical Missile Launch System . defense post. 1 October 2021 . https://web.archive.org/web/20211001081545/https://www.defenseworld.net/news/30531/China_Reveals_Universal_Ship_borne_Vertical_Missile_Launch_System . 1 October 2021 . dead.
  8. Web site: Rick . Joe . All You Need to Know About China's New Stealth Destroyer . The Diplomat . 8 June 2018 . 13 June 2018 . https://web.archive.org/web/20180613005400/https://thediplomat.com/2018/06/all-you-need-to-know-about-chinas-new-stealth-destroyer/ . 13 June 2018 . live .
  9. Web site: Patent US7540227 – Air based vertical launch ballistic missile defense – Google Patents . 2003-05-06 . 2016-12-29 . https://web.archive.org/web/20161230002334/https://www.google.com/patents/US7540227 . 2016-12-30 . live .
  10. Web site: Stöhs . Jeremy . How High? The Future of European Naval Power and the High-End Challenge . Centre for Military Studies . Djøf Publishing . 12 September 2021.
  11. Web site: Patrol ship for distant sea areas Project 22160E | Catalog Rosoboronexport.
  12. Web site: Project 11541 "Korsar".
  13. Web site: ЦКБ МТ Рубин: Amur 950.
  14. Web site: Russia's newest submarines are 'on par with ours' and sailing closer to the US, top commanders say. Business Insider.
  15. Web site: SSBN Typhoon Class (Type 941).
  16. Web site: Delta III Class Ballistic Missile Submarine Military-Today.com.
  17. Web site: Explainer: Russia's Delta IV Nuclear Missile Submarines. 23 December 2020.
  18. Web site: SSBN Borei Class Nuclear-Powered Submarines.