In 2017, the Indonesian Navy launched its first Chang Bogo-class submarine, the KRI Nagabanda – a Chang Bogo-class submarine was purchased from South Korea.
From a country with no arms production capacity and dependent on its allies, South Korea quickly mastered technology and became a dominant player in the arms export market. According to the Korea Institute of Industrial Technology, the US will become the largest export market for Korea’s defense industry products, followed by India, Indonesia and the Philippines. The fact that South Korea quickly became an arms exporter has been explained by some experts: because South Korea had previously imported a large number of weapons from abroad, especially the United States and Germany, so they collected attracting a large number of the elite science and technology of these countries. In addition, under the push of the government, the level of investment in research and development of private manufacturers has continuously increased. It can be said that the greatest success of the Korean defense industry is mastering the technology of submarine construction.
In the late 1980s, South Korea realized that it was necessary to equip submarines for the navy, not only to deal with North Korea but also to the growth of China, Japan and even Russia. After negotiations and evaluations, South Korea chose Germany as the nation to supply its submarines. In 1993, the South Korean Navy received the first Type 209 diesel-electric attack submarine, ordered as the Chang Bogo class. The first Chang Bogo was completed in Germany, while the remaining were produced in South Korea under German license. A total of 9 submarines were commissioned between 1993 and 2001. So far, the Chang Bogo-class submarines have undergone modernization, compared to the original ones, the combat power of the Chang Bogo-class has increased significantly.
In addition to producing to meet domestic military needs, the Chang Bogo class was exported to Indonesia. According to Indonesian media, South Korea’s DSME Naval Shipyard completed the construction of the first three submarines that Indonesia ordered from South Korea. By 2019, Indonesia continues to order 3 more Chang Bogo-class submarines.
The first Chang Bogo-class submarine that Indonesia received from DSME was named KRI Nagabanda, hull number 430. This name was given to the Whiskey-class submarine exported by the Soviet Union to Indonesia from 1960-1970.
It is known that all three Chang Bogo-class diesel-electric submarines of Indonesia were adjusted by DSME on the design of the Indonesian Navy. It was not until 2013 that the construction of the above ships took place. In terms of exterior design, Indonesia’s submarines are similar to those of the South Korean Navy, but they have the maximum displacement when surfaced and submerged larger with 1,442 tons and 1,572 tons, respectively.
Chang Bogo-class diesel-electric submarine is a domestic Korean submarine based on the German Type 209 model. With the maximum submerged displacement of from 1,200-1400 tons, 56-61m long, the beam is 6.3m, crew of 33 people.
South Korean submarines are equipped with four MTU Type 8V396 SE diesel engines and one Siemens electric motor, driving 1 shaft. The propulsion system produces a maximum power of 5000 shaft horsepower, allowing the submarine to reach a maximum speed of 21.5 knots when submerged and 11 knots when surfaced. The range of submarines can be up to 11,000 nauticalmiles at 10 knots when surfaced and 8000 nauticalmiles when submerged at 10 knots.
The submarines are armed with eight bow 533 mm torpedo tubes and fourteen torpedoes, all located in the bows. The ships are also armed with UGM-84 Harpoon integration missiles to enhance the boats capabilities against surface ships. The class also can be armed with 28 mines in place of torpedoes and Harpoon missiles. It is armed with SUT – Surface and Underwater Target Torpedoes, which are wire-guided weapons with active homing and the ability to carry a 260kg High-explosive warhead out to a maximum range of 28km.
The Korean Navy operated nine Chang Bogo-class diesel-electric submarines between 1993 and 2001.