Role & capabilities
- Maritime surveillance
- Modular mission equipment
- Primary domain
- Sea surface
- System type
- Uncrewed surface vessel
- Developer / manufacturer
- LIG Nex1
- Origin / production countries
- South Korea
- Other names
- Sea Sword-X; 해검-X
- Variants / configurations
- Not distinguished in reviewed sources
- Operators / programme customers
- Not identified in reviewed sources
Evidence & current status
Public programme evidence establishes the stated maturity only; unreported numerical data remain unknown.
Haegeom-X is LIG Nex1's concept for a future modular uncrewed surface vessel. The company's own MADEX announcement dates its public presentation to May 2025, earlier than the 2026 exhibition reports that drew renewed attention to it. It is therefore an established public concept rather than a newly invented 2026 designation.
The display describes a vessel carrying multifunction radar and interchangeable mission equipment, with proposed satellite and airborne-relay communications. These are intended architectural features, not evidence that every integration has completed qualification at sea. Public numerical dimensions, displacement and mission-specific endurance were not established from the reviewed primary material.
A December 2025 company release announced funded research into control and autonomous mission technologies and illustrated Haegeom-X. That supports ongoing work in the same technology area, but it is not a delivery certificate for the concept boat. The separate reconnaissance-USV development programme, with a 2027 objective, should likewise not be assumed to be the same hull. Keeping Haegeom-X distinct from the earlier Haegeom demonstrators makes both maturity and configuration uncertainty visible while allowing subsequent prototype milestones to be added.
Sourced specifications
Figures apply to the named configuration. Maximum values are not guaranteed operating performance.
| Specification | Reported value | Context & source |
|---|---|---|
| Configuration | Modular uncrewed surface-vessel concept | Published configuration baseline; not independently demonstrated at every loading and sea condition. Source ↗ |
| Hull / propulsion | Not established in the reviewed public sources. | Public evidence gap. No estimate or neighbouring variant value has been substituted. Source ↗ |
| Dimensions | Not established in the reviewed public sources. | Public evidence gap. No estimate or neighbouring variant value has been substituted. Source ↗ |
| Displacement / mass | Not established in the reviewed public sources. | Public evidence gap. No estimate or neighbouring variant value has been substituted. Source ↗ |
| Payload | Interchangeable mission equipment proposed | Published configuration baseline; not independently demonstrated at every loading and sea condition. Source ↗ |
| Endurance | Not established in the reviewed public sources. | Public evidence gap. No estimate or neighbouring variant value has been substituted. Source ↗ |
| Range | Not established in the reviewed public sources. | Public evidence gap. No estimate or neighbouring variant value has been substituted. Source ↗ |
| Speed | Not established in the reviewed public sources. | Public evidence gap. No estimate or neighbouring variant value has been substituted. Source ↗ |
| Sea state / environment | Not established in the reviewed public sources. | Public evidence gap. No estimate or neighbouring variant value has been substituted. Source ↗ |
| Sensors | Multifunction radar proposed | Published configuration baseline; not independently demonstrated at every loading and sea condition. Source ↗ |
| Communications / control | Satellite and airborne-relay control options proposed | Published configuration baseline; not independently demonstrated at every loading and sea condition. Source ↗ |
| Launch / deployment | Not established in the reviewed public sources. | Public evidence gap. No estimate or neighbouring variant value has been substituted. Source ↗ |
Documented milestones
MADEX debut announced
LIG Nex1 announced the Haegeom-X concept for the following day's MADEX opening.
Read the announcement ↗
Publication history
- — Added in the September 2026 global coverage review, with sources, configuration limits and explicit data gaps.
Suggest a correction to this entry →
Follow the evidence
Source types identify who makes the claim. Programme milestones and supplier statements should be read in context.
- LIG Nex1-issued Haegeom-X debut announcement, 27 May 2025 (opens in a new tab)Manufacturer press release
- LIG Nex1-issued future USV technology work announcement, 23 December 2025 (opens in a new tab)Manufacturer press release