YIDEX 2026 - LIG D&A USV Lineup: South Korea exhibition or demonstration

Development and reported outcome

LIG Defense & Aerospace presented a broad unmanned-surface-vessel lineup at YIDEX 2026 from April 1 to 3. The display included reconnaissance platforms, the armed Sea Sword-X, one-way-attack concepts, shipborne USVs and mine-warfare concepts aligned with the ROK Navy's Navy Sea GHOST architecture. This is a domestic capability-presentation milestone and not a procurement award.[S1] [S2]

Program, platform and stakeholders

Programme or contract: YIDEX 2026 - LIG D&A USV Lineup. Platform or product: Reconnaissance USVs; Sea Sword-X armed USV; one-way-attack, shipborne and mine-warfare USV concepts. Recorded supplier, developer or relevant organization: LIG Defense & Aerospace (reported headquarters/country: South Korea). Recorded customer, operator or intended user: ROK Navy / South Korean defense stakeholders (reported headquarters/country: South Korea).[S1] [S2]

Mission and technical scope

The following are classifications recorded in the source master, not additional claims of operational deployment: Mission/use-case classification: Navy Sea GHOST; Autonomous Naval Operations. Operating mode: Autonomous Surface Vessel (ASV).

Contract, value and shipment signals

The master does not contain a dependable disclosed contract amount, shipment quantity or delivery schedule for this development. These should not be assumed to be zero.[S1] [S2]

Source verification and interpretation limits

UXV Searcher master source-coverage note: Official LIG and Yonhap reporting confirm the YIDEX 2026 USV lineup and Sea Sword-X combat-USV presentation within the ROK Navy Sea GHOST context. No procurement is inferred.

Interpretation boundary: A conference presentation or exhibition display is not, by itself, evidence of a sale, production contract or fleet entry.[S1] [S2]

UXV Searcher analysis — what the development changes

UXV Searcher interpretation — industry event / public visibility: The South Korea USV record for YIDEX 2026 - LIG D&A USV Lineup is best treated as a ecosystem visibility signal. A display, award or conference appearance is evidence of visibility, not inherently of orders, production or deployment.

Traceability for buyers: The dataset associates LIG Defense & Aerospace with ROK Navy / South Korean defense stakeholders for Reconnaissance USVs; Sea Sword-X armed USV; one-way-attack, shipborne and mine-warfare USV concepts. This supports stakeholder mapping; supply-chain tier, exclusivity and signed-customer relationships need the underlying source before firm classification.

Client-use interpretation: For intelligence users tracking Navy Sea GHOST; Autonomous Naval Operations, the relevant next proof points are marine mission suitability, payload integration and measurable delivery or service outcomes. Track named customer or programme commitments and independently confirmed commercial follow-on announcements.[S1] [S2]

Quantitative evidence, calculations and limits

Quantification limit: No sufficiently attributed contract value or physical platform count is disclosed for this record. UXV Searcher leaves these fields unavailable rather than treating non-disclosure as zero or applying an unsupported market average.

The useful output is a qualitative stage and stakeholder signal, not a numerical forecast.[S1] [S2]