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Thread: Stealthy operation in littoral waters: S. Korean missile speed boat, semi-submersible

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    Default Stealthy operation in littoral waters: S. Korean missile speed boat, semi-submersible

    A few months ago Jane's published an interesting article about ROKN's littoral warfare vessels, comprised of high-speed boat or submersible designs. Key highlighted features of these Korean-built LWVs are stealth, versatility and cost-effectiveness. Some are already deployed, some are being built, while others will soon be offered for the ROK Navy as well as for the export market. The littoral component of the ROK Navy is a relatively overlooked subject in the mainstream media, so I decided to make a thread to introduce them.

    Stealthy operation in littoral waters

    By: IHS Web Editor Published: 07 May 2012

    When danger lurks in coastal waters or where discreet or covert operation is necessary, some unusual products of South Korea’s VOGO Company may well have a part to play.

    Photographs on the company’s stand (B109 in Hall 1) depict small manned submersibles, as well as a dual-role craft. The SDV 340 manned submersible, which has been in service with the ROK Navy since 2005, is VOGO’s first product, while a further five are operational with the country’s Naval Special Warfare Brigade. Carrying crew of three, the SDV 340 is 7.9m in length and has a 45nm range at 3.5kts.

    At 13m long, the SDV 1000W incorporates some systems proven on the SDV 340, but its submerged range is reduced to 25nm. However, when operating on the surface, it has a range of 150nm and is capable of 35kts.

    The SDV 1000W is promoted as a cost-effective solution for most littoral warfare. With diesel electric propulsion, this unusual craft offers high speed on the surface or, using electric motors, it runs stealthily under water.

    With a payload of 1.5 tonnes, it can accommodate 10 people and, using an individual electrical built-in breathing system, allows a three-hour dive at an 18m depth, without the risk of decompression and oxygen poisoning.

    Procurement of the SDV 1000W for the ROK Navy will begin next year, but to date orders for the proposed Midget 200 have yet to be received. Some 30m in length and displacing 180 tonnes, it will have a surface range of 1,500nm and carry a team of commandos in addition to the crew of four. Midget 200 has two external tubes, each accommodating a heavy torpedo, while its onboard defence includes passive, intercept and obstacles avoidance sonar suites, as well as ESM/E

    http://www.ihs.com/events/exhibition...al-waters.aspx
    ROKN began introducing new stealth submersibles for special operations when the Cosmos class midget subs were gradually being decommissioned. On the high-end of the Cosmos replacement program, ROKN has the KSM-500A small submarine project that combines lithium-ion battery propulsion with conventional submersible technology. On the low-end of the program, lined up below, the smaller submersibles also use lithium polymer battery as their main or secondary power source, giving them enough underwater duration and range to operate effectively in Korean littoral waters. Some of them are capable of advanced minelaying or anti-ship warfare.

    SDV 340:


    ASDV 800:


    SDV 1000W:


    Midget 200:

    (a bit obscured on the far right)

    Fast Assault Boat:






    The fast assault boat, when the 'deck' is cleared, can carry a pair of anti-ship missile tubes or a rocket launcher. Hanwha and some others have began converting the 130mm MLRS mount of the Chunmoo K-MLRS for small naval vessels under contract from DAPA. The R&D project is budgeted by the National Assembly Defense Committee with $7.4 million for 2013.

    차기고속정 130mm 유도로켓 연구개발
    Next hydrofoil 130mm guided rocket research and development


    The ROKN is also inducting an upgraded fleet of high-speed coastal patrol boats, dubbed the YUB-B class, that use water jet. They have sonar and depth charges to watch out for infiltrating enemy submersibles. More recently, they've also been equipped with a large number of towed diver detection systems to better protect Korean harbors against human infiltration or the hypothesized 'human torpedo'.






    http://www.upi.com/Business_News/Sec...9401335463788/

    The littoral warfare vessels of ROKN will see a variety of asymmetric warfare applications in the future, much of which are not known to us with any specificity given ROKN's (and likewise the open literature and mass media's) preoccupation with how to counter their very threat. But it can also serve as a tacit show of force and capability that small boat tactics, infiltration, and surprise minelaying or torpedo attack against major ships or naval bases of an enemy is also a possible choice of action from the ROKN. Against some navies in the region, such asymmetric warfare strategy may work effectively with complete immunity given their relatively weak or almost non-existent anti-submarine or anti-mining capabilities. This can expand ROKN's possible strategic choices and narrow down the enemy's in an escalated low-intensity naval conflict.
    Last edited by Ambassador; 12-17-2012 at 03:54 AM.

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    Interesting set of vessels. Some of those small boats can still pack fairly heavy firepower. The Israeli Super Dvora's can for example carry a remotely operated 25-30mm turret which can also have a couple of Stinger type of missiles attached to the turret, as well as two remotely operated .50 cal turrets and a multi-launcher for Spike NLOS 25km range missiles. Quite a bit of firepower for a small package.

    -----JT-----

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    Any idea of the specs on the YUB-B, and are the green scuba tank looking cylinders on the rack small depth charges or anti-swimmer weapons?

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    Quote Originally Posted by vajt39 View Post
    Interesting set of vessels. Some of those small boats can still pack fairly heavy firepower. The Israeli Super Dvora's can for example carry a remotely operated 25-30mm turret which can also have a couple of Stinger type of missiles attached to the turret, as well as two remotely operated .50 cal turrets and a multi-launcher for Spike NLOS 25km range missiles. Quite a bit of firepower for a small package.

    -----JT-----
    They are also capable of being fitted with two Gabriel AShMs, making them the smallest FACs in the world at under 50 tons displacement.

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    Quote Originally Posted by Laptop Hobo View Post
    Any idea of the specs on the YUB-B, and are the green scuba tank looking cylinders on the rack small depth charges or anti-swimmer weapons?
    They are small depth charges that can also serve as anti-swimmer weapons. The YUB's main role is to protect harbors from small-scale infiltration by individual divers or submersibles. The depth charges are most effective against slow-moving underwater targets that are too small and silent to be tracked by torpedo.

    I also forgot; ROKN has began mounting surplus Mistrals on patrol ships to serve as anti-ship missiles as well as anti-air. They are especially important to fight off NK attack choppers and hovercraft near the NLL.

    South Korean Navy to Operate Mistral Missiles on Patrol Boats
    By KoreanInformation on Thursday, September 1st, 2011

    The South Korean Navy is planning to load man-portable Surface to Air Missiles (SAM), so-called Mistral, to all patrol boats in operation in due order to use them in antiaircraft and antiship defense purpose.

    “The Navy will load Mistrals onto patrol boats that are deployed in the Yellow Sea [near the Northern Limit Line] starting the end of this month,” said an official under the Naval Operations Command. “Eventually, all patrol boats will be equipped with such weapon and we expect strong defense capabilities in the waters [near the inter-Korean maritime border] and firepower of warships.”

    http://www.defencetalk.com/south-kor...l-boats-36696/
    These are relatively low-cost and minor capability upgrades for the ROKN but can really improve the individual small ship's fighting potential in asymmetric warfare, and thus the whole navy's strategic efficiency. Deploying a destroyer class ship constantly on station around a harbor to look out for enemy diving units is kind of waste, for example. Ships with highly capable sonars need to operate on the frontline. YUBs and diver detection systems can fill their role just as well.

    Quote Originally Posted by Ought Six View Post
    They are also capable of being fitted with two Gabriel AShMs, making them the smallest FACs in the world at under 50 tons displacement.
    China also has a similar FAC design, named China Cat. It can equip as many as eight C-704 AshM on a 20-ton catamaran hull.


    Last edited by Ambassador; 12-18-2012 at 12:19 PM.

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    The Aron MK80 attack WIG development for coast patrol is nearing completion. The weapon will be 70mm LOGIR.






    LOGIR guided rocket targets multiple surface threats
    By Richard Scott
    8/13/2010

    A LOw-cost Guided Imaging Rocket (LOGIR) concept demonstration funded as part of the US Office of Naval Research's (ONR's) Future Naval Capabilities Low-Cost Imaging Terminal Seeker (LCITS) programme has concluded with a successful engagement of a fast surface target.

    This paves the way for the joint US/Republic of Korea LOGIR weapon's transition to the Medusa joint capability technology demonstration (JCTD) phase, which will include a military utility assessment intended to lead to an acquisition programme.

    LOGIR was conceived in 1999 to meet a capability shortfall against small, moving maritime targets. It is a 'fire and forget' munition that marries a low-cost imaging infrared (IR2) precision-guidance section to existing Hydra-70 2.75-inch (7 cm) unguided rockets in order to increase lethality against the FAC/FIAC (fast attack craft/fast inshore attack craft) threat.
    http://www.janes.com/products/janes/...?id=1065927285
    The MK80 was designated as one of the Korean defense industry's strategically important materials together with K2, T-50, Surion and KUS-9.


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    Hyundai Heavy Industries is the contracted builder of the KSM-500A mini-submarine. $200 million will be spent to build the submarine fleet for special operations and attack roles until 2016. The exact number of submarines to be built is unknown but it will replace all three Dolgorae submarines. The submarines will carry a main sonar for attack and a secondary sonar for mine detection, which is crucial for safe infiltration into mined waters.

    Small submarines to penetrate the need of 北 introduced key
    : 27/11/2012 03:03

    Military authorities in need of our special forces of North Korea, the penetration depth and shallow, such as the operation in the Yellow Sea for 500t-class miniature submarine since 2016 was known to be planning to introduce.

    Government sources, "miniature submarine is useful as a means of penetration of the Special Forces, but our Navy older 150t class 'dolphin' be operated submersible one, but" 26 "larger than the dolphins a special dedicated to the introduction of the small submarine gaunt to , "he said. Small submarines business is to be injected into a total budget of 2,200 billion won to be conveyed. Government authorities recently small submarines supplier to Hyundai Heavy Industries was selected.

    Small submarine crew in addition to secretly infiltrate the need of the coast so that you can burn more than 20 Navy UDT / SEAL special ops role. Also known 533 ㎜ torpedo about 6-foot-mounted trap for attack missions that can be performed. "Mini-submarine, the smaller size is expected to be able to work operations in the Yellow Sea from the average depth of only 40 ~ 50m," the military source said.

    http://news.chosun.com/site/data/htm...112602546.html


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    Recently, a certain number of towed multibeam side scan sonars have been deployed for use by naval patrol ships. Developed by an SME named SonarTech, the SeaView 400M is a low-cost littoral submarine, diver and mine detection system operating at depths of sea level to 600m. The high-resolution scans below show a mannequin, a tire and a helicopter submerged at sea and river floor. Relying on no more than a laptop software and a 1kW generator to operate, it requires very minimum modifications to install on existing coast guard and navy patrol ships, and delivers very cost-effective capabilities.








    2012-10-28 18:00

    Busan's small and medium-sized enterprises with the Department of Defense and the Navy, and domestic and international logistics industry was surprised. Underwater search Sonar for Naval Ships (side-scan sonar equipment), less than sonar localization and self-developed 50 billion of product delivery to the Navy because

    Not long ago, Sonar Tech 10 naval vessels be equipped with 10 sonar, the amount of 48 billion as the amount delivered success was. 3 new Naval Shipboard Sonar, 2.2 billion won worth of supply contracts is underway. Navy with additional new sonar developed a business plan has been prepared. Is now large shipyards in the first situation, the incoming co-development projects proposed purchase conditional

    http://m.etnews.com/news/nationland/2667334_4439.html
    Hm, so this is the sonar used by the YUBs for harbor protection. The Atlas Elektronik diver detection system appears to be installed on stationary nodes around a harbor, rather than on ships.

    An examination of DAPA contracts also reveal the development of a conformal flank array sonar by SonarTech, possibly for use with submersibles. There will be more interesting announcements to come.

    By the way, I also found this funny stuff... lolwut? BoatKorea '32mm Rocket Launcher'!


    A new age of global piracy!

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    Quote Originally Posted by Ambassador View Post
    The Aron MK80 attack WIG development for coast patrol is nearing completion. The weapon will be 70mm LOGIR.
    Would this system perhaps serve as a counter to the fleet(s ?) of NK hovercraft? Seems the ideal platform to me.

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    Quote Originally Posted by popsicle View Post
    Would this system perhaps serve as a counter to the fleet(s ?) of NK hovercraft? Seems the ideal platform to me.
    WIGs can operate like helicopters from the sea. They can be armed with machine guns, rockets and small missiles, and can take off from and land on any calm water. It is not a specific counter to an existing weaponry; in fact it is an offensive weaponry in itself. WIGs can harass warships of the enemy, through shoot-and-scoop: pop out of sea level to fire missiles from a height, and then disappear below radar horizon. It's better than typical swarm boats for such engagement and evasion tactics.

    All that said, I believe the Korean WIGs can engage hovercraft quite effectively, since they will be armed with the fire-and-forget LOGIR, and will serve as excellent fast-response assets due to their speed. They will not be impervious from counter-fire, though it's the same risk that all helicopters and patrol ships have to deal with.



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    Quote Originally Posted by Ambassador View Post
    WIGs can operate like helicopters from the sea. They can be armed with machine guns, rockets and small missiles, and can take off from and land on any calm water. It is not a specific counter to an existing weaponry; in fact it is an offensive weaponry in itself. WIGs can harass warships of the enemy, through shoot-and-scoop: pop out of sea level to fire missiles from a height, and then disappear below radar horizon. It's better than typical swarm boats for such engagement and evasion tactics.

    All that said, I believe the Korean WIGs can engage hovercraft quite effectively, since they will be armed with the fire-and-forget LOGIR, and will serve as excellent fast-response assets due to their speed. They will not be impervious from counter-fire, though it's the same risk that all helicopters and patrol ships have to deal with.


    Cheers for the answer. These WIGs do look pretty cool, and are the sort of thing that I have imagined being operated from an LCS in the Hormuz Straits for instance (to combat those Iranian super-duper-mega flying boat things). Maybe the US Navy could buy a few ...

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    Unmanned minekiller development equipped with side scanners has been all crazy since 2010. At least four different defense companies responded to DAPA's request for proposal.


















    Korea is upgrading its mine warfare capability on both ends, minesweeping and minelaying.









    Other naval build-up plans include the construction of six to nine 5,000-ton next-generation Korean destroyers, about 20 2,300-ton frigates, one 3,000-ton mine layer and three more 730-ton mine sweepers, the officer said.

    http://www.koreatimes.co.kr/www/news...13_122831.html
    The minelayer and a minesweeper are scheduled to be launched this year, which I will make a new thread for. Eventually, they will increase ROKN's fleet of major mine warfare warships to two minelayers and twelve minesweepers.

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    So are you lad's going to actually build this sweet beast 'Bass?

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    Quote Originally Posted by muttbutt View Post
    So are you lad's going to actually build this sweet beast 'Bass?
    There will be a tender for ROKN's new midget submarines for special operations, and VOGO will submit a bid for it. It is one among many types that can be selected to replace the Dolgorae class midget submarines. HHI and Samsung Techwin are also bidding in it.

    http://en.wikipedia.org/wiki/Dolgorae_class_submarine

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    Kokam's Superior Lithium Polymer Battery (SLPB) technology looks very promising as power source for AUVs and submersibles. The power density ratio reaches as high as 200Wh per kg on the most advanced models. Kokam's been supplying them to the US military for a long time... I wonder what new marvel they would create for our own weapon systems.




    Kokam America, a Lee's Summit, Missouri-based corporation formed in October 2005, has supplied battery sustainment to the U.S. Department of Defense with advanced battery products developed, designed and patented by Kokam Co., Ltd. in South Korea.

    Kokam Co. Ltd. is the primary patent holder of the Superior Lithium Polymer Battery (SLPB) technology. Through the acquisition of Kokam America's assets, Dow Kokam has the equipment and the capacity to manufacture the widest range of lithium polymer cells in production today and to extend its offering to the electric mobility industry.

    http://www.prnewswire.com/news-relea...-69860837.html
    "From the next generation of hybrid vehicles, to unmanned military ground and air vehicles and high-end industrial products, Dow Kokam's robust lithium-ion technology sets the pace for advanced battery systems in today's demanding applications," Dow Kokam CEO Ravi Shanker said.

    http://www.ourmidland.com/news/artic...6eb98abb8.html

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