Wake homing

Last updated
Wake behind a vessel of the German navy Luftaufnahme Nordrhein-Westfalen (F 223) mit Kielwasser.jpg
Wake behind a vessel of the German navy
Soviet 53-65K torpedo developed during the Cold War 53-65K torpedo at Park Patriot.jpg
Soviet 53-65K torpedo developed during the Cold War

Wake homing is a torpedo guidance technique based on the wake trajectory left behind a moving target. [1]

Contents

The torpedo is fired to cross behind the stern of the target ship, through the wake. As it does so, it uses sonar to look for changes in the water caused by the passage of the ship, such as small air bubbles. When these are detected, the torpedo turns toward the ship. It then follows a zig-zag course, turning when it detects the outer edge of the wake, to keep itself in the wake while moving forward. This will eventually bring it to the stern of the ship, where its warhead can do the most damage to propulsion and steering.

Advantages and disadvantages

The system is difficult to jam, but it can be distracted by other ships crossing the wake. In 2013, the US Navy tested prototypes of a system known as the Countermeasure Anti-Torpedo (CAT), [2] which had been designed to intercept and destroy the incoming torpedo. Deployment of the system did not proceed as planned due to performance issues. [3]

The main disadvantage of wake homing is that the course taken to the target is not direct and may be far from optimal, as it mimics the target's own trajectory from the point of wake's interception onward. As the torpedo's remaining distance always increases hand-in-hand with the distance made by the vessel itself, this necessitates the torpedoes to have a significantly higher speed and longer range than normal.

Also, being an active method, sonar wake homing gives up the torpedo position. This is why it is usually supplemented by passive methods, such as thermal and refractometric wake detection. Thermal wake detection centers on locating changes in water temperature in the ship's wake. Refractometric detection senses minute changes in the water's refraction index due to cavitation bubbles and such.

Examples

Related Research Articles

<span class="mw-page-title-main">RUR-5 ASROC</span> Anti-submarine missile system

The RUR-5 ASROC is an all-weather, all sea-conditions anti-submarine missile system. Developed by the United States Navy in the 1950s, it was deployed in the 1960s, updated in the 1990s, and eventually installed on over 200 USN surface ships, specifically cruisers, destroyers, and frigates. The ASROC has been deployed on scores of warships of many other navies, including Canada, Germany, Italy, Japan, the Republic of China, Greece, Pakistan and others.

<span class="mw-page-title-main">Sonar</span> Acoustic sensing method

Sonar is a technique that uses sound propagation to navigate, measure distances (ranging), communicate with or detect objects on or under the surface of the water, such as other vessels.

<span class="mw-page-title-main">Torpedo</span> Self-propelled underwater weapon

A modern torpedo is an underwater ranged weapon launched above or below the water surface, self-propelled towards a target, and with an explosive warhead designed to detonate either on contact with or in proximity to the target. Historically, such a device was called an automotive, automobile, locomotive, or fish torpedo; colloquially a fish. The term torpedo originally applied to a variety of devices, most of which would today be called mines. From about 1900, torpedo has been used strictly to designate a self-propelled underwater explosive device.

<span class="mw-page-title-main">Depth charge</span> Anti-submarine weapon

A depth charge is an anti-submarine warfare (ASW) weapon. It is intended to destroy a submarine by being dropped into the water nearby and detonating, subjecting the target to a powerful and destructive hydraulic shock. Most depth charges use high explosive charges and a fuze set to detonate the charge, typically at a specific depth. Depth charges can be dropped by ships, patrol aircraft, and helicopters.

The Mark 24 Tigerfish was a heavyweight acoustic homing torpedo used by the Royal Navy (RN) during the 1980s and 90s. Conceptual development dates to the mid-1950s, and formally started in 1959 with a target introduction date in 1969. A lengthy development process led to a greatly reduced performance requirement, including the removal of anti-surface capabilities. The first prototype "Tiger Fish" examples were delivered in 1967.

The Spearfish torpedo is the heavy torpedo used by the submarines of the Royal Navy. It can be guided by wire or by autonomous active or passive sonar, and provides both anti-submarine warfare (ASW) and anti-surface warfare (ASuW) capability. Spearfish development began in the 1970s, with production starting in 1988, and deployment in 1992. By 2004, the new weapon had completely replaced the older Tigerfish torpedo. It is one of the most advanced torpedoes in the world.

ARA <i>San Luis</i> (S-32)

ARA San Luis (S-32) was a Type 209 diesel-powered submarine of the Argentine Navy. Built in Germany, San Luis has a displacement of 1,285 tonnes and was commissioned in 1974. The submarine operated against the Royal Navy during the Falklands War without any noticeable success, but survived a number of anti-submarine sweeps carried out by British frigates. San Luis was struck in 1997 after an incomplete overhaul.

<span class="mw-page-title-main">Mark 48 torpedo</span> American heavyweight submarine-launched torpedoes

The Mark 48 and its improved Advanced Capability (ADCAP) variant are American heavyweight submarine-launched torpedoes. They were designed to sink deep-diving nuclear-powered submarines and high-performance surface ships.

<span class="mw-page-title-main">Type 53 torpedo</span>

Type 53 is the common name for a family of 53 cm torpedoes manufactured in Russia, starting with the 53-27 torpedo and continuing to the modern UGST (Fizik-1), which is being replaced by the Futlyar.

The Type 65 is a torpedo manufactured in the Soviet Union/Russia. It was developed for use against US Navy aircraft carrier battle groups, as well as large merchant targets such as supertankers and advanced enemy submarines. It is now typically fitted to newer Russian vessels, though often the 650 mm torpedo tube is fitted with a 533 mm converter to enable firing of SS-N-15 missiles or Type 53 torpedoes.

<i>Delhi</i>-class destroyer Indian class of warships

The Delhi-class destroyers are guided-missile destroyers of the Indian Navy. Three ships of this class are in active service. The Delhi-class vessels were the largest vessels to be built in India at the time of their commissioning. The ships were built by Mazagon Dock Limited (MDL) at a cost of 750 crore each.

<span class="mw-page-title-main">Anti-submarine weapon</span> Weapon to be used in anti-submarine warfare

An anti-submarine weapon (ASW) is any one of a number of devices that are intended to act against a submarine and its crew, to destroy (sink) the vessel or reduce its capability as a weapon of war. In its simplest sense, an anti-submarine weapon is usually a projectile, missile or bomb that is optimized to destroy submarines.

<span class="mw-page-title-main">Sting Ray (torpedo)</span> British, acoustic homing, light-weight

The Sting Ray is a British acoustic homing lightweight torpedo (LWT) manufactured by GEC-Marconi, who were later bought out by BAE Systems. It entered service in 1983.

<span class="mw-page-title-main">AN/SLQ-25 Nixie</span> Towed torpedo decoy system

The AN/SLQ-25 Nixie and its variants are towed torpedo decoys used on US and allied warships. It consists of a towed decoy device (TB-14A) and a shipboard signal generator. The Nixie is capable of defeating wake-homing, acousting-homing, and wire-guided torpedoes. The decoy emits signals to draw a torpedo away from its intended target.

<span class="mw-page-title-main">Acoustic torpedo</span>

An acoustic torpedo is a torpedo that aims itself by listening for characteristic sounds of its target or by searching for it using sonar. Acoustic torpedoes are usually designed for medium-range use, and often fired from a submarine.

<span class="mw-page-title-main">Anti-submarine warfare</span> Branch of naval warfare

Anti-submarine warfare is a branch of underwater warfare that uses surface warships, aircraft, submarines, or other platforms, to find, track, and deter, damage, or destroy enemy submarines. Such operations are typically carried out to protect friendly shipping and coastal facilities from submarine attacks and to overcome blockades.

<span class="mw-page-title-main">Mark 37 torpedo</span> American acoustic torpedo

The Mark 37 torpedo is a torpedo with electrical propulsion, developed for the US Navy after World War II. It entered service with the US Navy in the early 1950s, with over 3,300 produced. It was phased out of service key with the US Navy during the 1970s, and the stockpiles were sold to foreign navies.

Type 039 submarine

The Type 039 submarine is a class of diesel-electric submarines of the People's Liberation Army Navy. The class is the first diesel-electric submarine to be fully developed within China and also the first Chinese diesel-electric submarine to use the teardrop hull shape.

The People's Liberation Army Navy (PLAN) is the naval branch of the People's Liberation Army (PLA), the armed forces of the People's Republic of China. The PLAN force consists of approximately 250,000 men and over a hundred major combat vessels, organized into three fleets: the North Sea Fleet, the East Sea Fleet, and the South Sea Fleet.

<span class="mw-page-title-main">U.S. Carrier Group tactics</span> Naval tactics

Naval tactics play a crucial role in modern battles and wars. The presence of land, changing water depths, weather, detection and electronic warfare, the speed at which actual combat occurs and other factors – especially air power – have rendered naval tactics essential to the success of any naval force.

References

  1. Kim, Dae Hyuk; Kim, Nakwan; Cho, Hyeonjin; Kim, Su Yong (2014-10-22). "A guidance logic development for wake homing guidance system (ICCAS 2014)". 2014 14th International Conference on Control, Automation and Systems (ICCAS 2014). Gyeonggi-do, South Korea: IEEE. pp. 190–194. doi:10.1109/ICCAS.2014.6987984. ISBN   978-89-93215-07-6. S2CID   16735317.
  2. 1 2 LaGrone, Sam (2013-06-20). "Navy Develops Torpedo Killing Torpedo". USNI News. Retrieved 2022-09-03.
  3. "Submarines: Wake Homing Torpedo Defies Defenses".