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KDX-III Sejong Destroyer - Batch II

KDX-III Sejong Destroyer - Batch IIThe next-generation Aegis is the largest destroyer introduced in Korea, with a length of 170 m and a weight of 8,100 tons, and can operate at a speed of up to 30 knots (55 km/h). Compared to the existing Sejong the Great (7600-ton) Aegis, its anti-submarine operation capability has been expanded by three times, and ballistic missile intercepting capability has been added.

The Navy argued that it should possess six Aegis ships of King Sejong King in addition to securing ability to deal with naval forces in neighboring countries, and to secure regular monitoring and interception capability of North Korean missiles. The National Defense Ministry, in its own discretion, passed additional 10 billion won in the name of the "Deposits for additional construction of King Sejong King" in the defense budget of 2013. However, the final budget of the defense budget approved by the Ministry of Justice was reduced by one billion won, and the Ministry of National Defense and the Joint Chiefs of Staff have rarely accepted the request of the Navy to further the King Sejong King for several years. In 2013 October Republic of Korea Navy Admiral Choi Yoon-hee, who was former chief of staff, became a member of the Joint Chiefs of Staff of the Republic of Korea.

Finally, on 10 December 2013, three additional Aegis vessels were decided by the Joint Chiefs of Staff. The budget was estimated at 4 trillion won, and the timing was announced between 2023 and 2027. This fleet is called the Dokdo- Ida fleet in the press.

With the addition of three additional King Sejong class vessels, it is now being watched as to what effect will be on the 'Mini Aegis', the next-generation destroyer ( KDDX ) project, which is known as the improved version of the Chungmugong Yi. Meanwhile no additional construction of King Sejong the Great-class had started. The National Assembly defense committee newly allocated 3 billion won to the additional construction project of King Sejong the Aegis destroyer in 2014 preliminary examination of the defense budget. This budget was originally reflected in the KDDX program, and as a result, the KDDX program was cut in full.

The BMD capability is a counter to North Korea's SLBM countermeasures, and it may be possible to achieve an aggressive killer scenario that intercepts the SLBM that is launched deeply into North Korea's territorial sea. The anti-submarine capability of the Korean Navy will be introduced in earnest for the first time.

On May 29, 2016, the Navy announced that the new KDX-3 Batch II, which is being built in additional, is equipped with a vertical firing system capable of operating all Standard-class missiles, SM-6 and SM-3. The vertical launch system mentioned seems to mean the BMD system. To cope with North Korea 's increasing ballistic missile threat. It was expected that a total of 60 SM-3s will be budgeted at KRW 900 billion per 20 missiles. The current US SM-3 for Japan Maritime Self-Defense Force to use 8 Aegis missiles per ship. Out of the SM-3 missiles equipped by Batch II for three ships, 30 SM-3 will be enough.

According to information from the 95th Defense Committee, the hull will be extended by 10m and the displacement of water will increase by 400 tons. The application of hybrid propulsion such as CODLAG and limited integrated mast is planned. In order to reduce the maintenance cost in batch 2, the Navy intends to change the propulsion system to a more efficient new propulsion system such as CODLAG, which is also used in COGAG in Daegu, and to reduce the number of crew members to 200 by automation. The maintenance cost will be reduced as compared to the arrangement 1. However, it is fortunate that the radar system, which can be considered as the present value of this transmission, is upgraded and consumes a lot of power.

A "groundbreaking" ceremony for the next-generation Aegis destroyer Gwanggaeto-III Batch II was held at the headquarters of Hyundai Heavy Industries in Ulsan on 05 October 2021, with key officials from the Navy and Defense Acquisition Program Administration in attendance. Gonggong is the stage in which the first block of a ship manufactured and assembled in the form of a block is mounted on a ship for construction. This marks the beginning of the full-scale construction.

Gwanggaeto-III Batch II was born because of the limitations of the existing King Sejong-class Aegis destroyers, which currently have three ships. To sum up the problems of King Sejong the Great in one word, there are only 'eyes' and no 'fists' to strike the enemy. The King Sejong-class selected a combat system and radar in 2002 during the Kim Dae-jung administration, and confirmed and built the target performance and basic design for 2003-2004 during the Roh Moo-hyun administration. It is equipped with the same Aegis Radar SPY-1D(V) multi-function phased array radar and Aegis combat system as the US Navy's main battleship Arleigh Burke class.

At that time, the Korean government saved about $300 million (about 353.7 billion won) of budget by introducing radar and combat systems in the form of a multinational joint purchase together with the United States and Japan. The Aegis radar and combat system produced at that time was applied to some quantities of the Arleigh Burke-class Flight 2A version (DDG-91~DDG-112) of the US Navy, two Atago-class Aegis destroyers of the Japan Maritime Self-Defense Force, and three Aegis destroyers of the Korean Sejong-class class.

The problem is that despite the seemingly identical version of the combat system, Baseline 7.1, the performance difference between the three Aegis ships is huge. This is because South Korea did not purchase the Aegis Ballistic Missile Defense (BMD) system, which was adopted as an option by the United States and Japan.

In order to properly operate an Aegis ship, a variety of options are needed, not just the ship's hull. In order to enjoy high-spec games or to edit images and videos smoothly, it is the same as the need to separately install a high-performance graphics card and appropriate software. In order for the Aegis ship to intercept enemy ballistic missiles, a separate system called BMD is required. The Kim Dae-jung and Roh Moo-hyun governments did not introduce the Aegis BMD, saying, We will not join the US-Japan-led MD network, fearing anti-American public opinion and backlash from China at the time. As a result, the three Sejong-class destroyers had no means to strike even if they caught a ballistic missile fired by North Korea. After the introduction of the King Sejong class, the threat of missiles from North Korea increased even more. In this reality, the Gwanggaeto-III Batch II project was promoted. Therefore, the baseline 9.C2 version with BMD capability was adopted as the combat system.

The biggest feature of the Baseline 9.C2 version is that it has IAMD (Integrated Air and Missile Defense) capability thanks to the BMD system, which was an option attached to the Aegis combat system, as a basic function. In the existing Aegis combat system, all other anti-aircraft detection functions stop when performing a ballistic missile response mission. This is because power and data computing power must be concentrated on one of the four-sided fixed radars. If the enemy fires a missile at the Aegis ship, which is performing a ballistic missile countermeasure mission, it will get stuck. This is also the reason why Japan secured six Aegis destroyers with excellent air defense capabilities and built four more high-performance air defense destroyers Akizuki-class to support them. On the other hand, the new Aegis combat system with IAMD capability can simultaneously perform ballistic missile response and air defense missions. While detecting and tracking ballistic missiles, it can also attack other air targets approaching it.

Baseline 9.C2 version has greatly improved not only defense but also attack ability. Existing Aegis ships detect and track a target with a phased array radar, and then guide an interceptor missile through an Illuminator. Even if more than 1,000 targets are detected at the same time, there are only about 20 targets that can be attacked due to the target indicator capability limit. On the other hand, Baseline 9.C2 version can share battlefield information with other allied assets in real time using the 'Link-16' data link system. Recently, the US Navy is building a system with the concept of NIFC-CA (Naval Integrated Fire Control?Counter Air). It is a cooperative engagement concept in which early warning aircraft, fighters, and warships are intertwined as one organism and fight together.

It is difficult for the Aegis ship to detect targets flying close to sea level from a distance of 37 to 40 km, which is affected by the Earth's surface effect. If data link with friendly fighters and early warning aircraft in the air is established, it can detect and attack targets from hundreds of kilometers away. The next-generation Aegis ships will also significantly increase the number of armaments that can be adopted. The new Baseline 9.C2 version can use not only the existing SM-3 Block IA/B missile with a range of 700 km and an interception altitude of 500 km, but also the latest SM-3 Block IIA missile with a range of 2500 km and an interception altitude of 1500 km. can The new SM-6 Block 1B, which will be deployed in 2023, can also be operated, which is expected to intercept Chinese anti-ship ballistic missiles and hypersonic missiles.

The remaining task is the decision of the Korean government. While introducing such a powerful next-generation Aegis destroyer, the purchase of 'Punch', that is, missiles, which will demonstrate strong air defense capabilities in combination with a combat system, has been sluggish over the past four years. South Korea signed a contract to purchase the Aegis Baseline 9.C2 combat system with Lockheed Martin of the United States in August 2016, but due to the regime change the following year, the purchase procedure for the SM-3 interceptor missile, which must be used in combination with the combat system, was 'all-stopped'. In March 2017, the Ministry of National Defense commissioned the Industry-University Cooperation Foundation of the National Defense University for a 'research on the effectiveness of anti-ship missiles for reinforcing KAMD'. The evaluation of the effectiveness of the SM-3 interceptor missile was the framework. Five months later, researchers at the National Defense University concluded that the KAMD (Korean Missile Defense System), which relied on land-deployed interceptors, could not respond to North Korea's high-altitude launch of nuclear missiles or high-altitude electromagnetic pulse (EMP) attacks. The introduction of SM-3 missiles is inevitable. The Ministry of National Defense did not make a decision to introduce the SM-3 missile even after being informed of the research results. Against this background, some observers say that the Ministry of National Defense was conscious of diplomatic friction with China.

In the meantime, military authorities have argued that the SM-3 lacks the ability to respond to new North Korean missiles for its high price. The answer is to introduce a cheaper SM-6 instead of the SM-3. Experts have pointed out several times that the SM-6 is unable to intercept North Korean ballistic missiles due to its slow speed and greatly reduced long-distance engagement capability. Nevertheless, since the Ministry of National Defense has been stagnant for many years, there were many voices of concern that the new Aegis ship is in danger of becoming a 'can' like the existing Aegis ship. Meanwhile, some media recently reported that the Joint Chiefs of Staff had decided to use both types of SM-3 and SM-6 missiles on the next three Aegis destroyers. The military has not yet responded to this. However, considering the construction schedule of the next Aegis ship to be delivered to the Navy in 2024, an official announcement was expected in the near future. Will the next-generation Aegis ship be a true shield of God, equipped with both SM-3 and SM-6?

While Hyundai Heavy Industries is building the lead ship of the next-generation Aegis destroyer, it succeeded in winning an additional order for the second ship. Hyundai Heavy Industries announced on 09 November 2021 that it had signed a contract with the Defense Acquisition Program Administration on the 8th to build the 'Gwanggaeto-III Batch-II 2nd Ship' worth 636.3 billion won. The Aegis ship ordered by Hyundai Heavy Industries this time is the second of three next-generation Aegis ships to be introduced by the Republic of Korea Navy, and is the same type as the lead ship ordered in October 2019. It will be built at the Ulsan shipyard and delivered to the Navy in 2026.




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Page last modified: 09-03-2022 19:42:19 ZULU