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Home» News»LIG Nex1 Successfully Completed the Trials of Sea Sword-II USV
Lig Nex1 successfully completed the trials of Sea Sword-II USV
Sea Sword-II USV (Lig Nex1 photo)

LIG Nex1 Successfully Completed the Trials of Sea Sword-II USV

South Korean defense company LIG Nex1 announced on December 15th, 2021, that it has completed the sea trials of its Sea Sword-II (Haegum in Korean) unmanned surface vehicle (USV).

Daehan Lee 10 Jan 2022

Sea Sword-II previously proved its operability in a performance test conducted off the coast of South Gyeongsang Province’s South Sea. In April 2021, its sea worthiness was regarded as equivalent to the combat-oriented Sea Sword-3, even being capable of operations at 2.5 meter high waves.

The major technology acquired is the ability to conduct reconnaissance operations based on the first-localized combination of surface and underwater unmanned platforms, overcoming strong and high tide. Other technical advances, such as multi-sensor data integration, mapping, and motion control, were also obtained, allowing for reconnaissance in a variety of maritime conditions.

The company explained that this success, achieved with local technology without foreign dependence, will help gain market competitiveness and be a step forward for maritime unmanned robots.

Co-invested by the Ministry of Trade, Industry, and Energy (MOTIE) and the Defense Acquisition Program Administration (DAPA), Sea Sword-II was developed by the Agency for Defense Development (ADD) for both commercial and military purposes.

“We will do our best to gain domestically unrivaled leadership as a “first mover” in the field of maritime unmanned systems, and to expand to foreign markets such as the Middle East and Southeast Asia based on such a position.”


Jaegwan Yoo, LIG Nex1 Unmanned System Research Center

Not only will Sea Sword-2 be used for patrolling activities underwater or on the surface, but it is also intended to be utilized strategically in MCM purposes, as well as to aid in underwater research or construction, civilian rescue, and so on.

About Sea Sword-II:

LIG Nex1’s new Sea Sword II variant at MADEX 2019

Sea Sword-II USV was first unveiled by LIG Nex1 in the MADEX-2019 exhibition in Busan, South Korea. It is 12 meters long, has a beam of 3.5 meters, and has a weight of 11 tons when fully loaded. It is powered by two diesel engines, providing a maximum speed of 35 knots. It has an operational endurance of about 180 nm at 20 knots.

It is specifically configured for surveillance and armed reconnaissance missions of littoral areas near military bases and radar blind zones. The Sea Sword II is a multi-mission platform featuring re-configurable mission modules. Besides the aforementioned tasks, it can perform specialized missions, such as mine countermeasure and surface warfare, thanks to the 2.75’’/70 mm multiple rocket launcher located at the stern. Additional armament includes a Hyundai WIA 12.7 mm remote-controlled weapon station. 

Surface and surveillance radar, as well as mast-mounted EO/IR, gyrostabilized gimbal, laser targeting and identification system, LIDAR, and wide-area cameras, are all part of the sensor suite. Because remotely piloting a large USV in uncharted seas is still difficult, LIG Nex1 included real-time underwater reconnaissance utilizing scan sonar and a homemade autonomous navigation system capable of obstacle avoidance.

LIG Nex1 Sea Sword-II USV 2022-01-10
Tags LIG Nex1 Sea Sword-II USV
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Authors

Posted by : Daehan Lee
Daehan Lee currently works for aerospace and defense-related projects in Seoul, also being a political, security affairs researcher writing about inter-Korean naval acquisition and development. He previously worked at the U.S. and Belgian Embassies in Seoul, the People Power Party, and election camps. Prior to his work in politics and foreign affairs, Lee served for the Republic of Korea Navy as an assistant to the Vice Admiral and a translator for Master Chief Petty Officers of the Navy, shortly working at the Joint Chiefs of Staff. Fields of interest include the Asia-Pacific security, defense acquisition, Korean politics and foreign policy.

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