IN Brief:
- Hanwha Aerospace and Hanwha Defense USA plan two guided rocket firing tests from a vessel off the southern US coast.
- The demonstrations will examine the feasibility of adapting the land-based Chunmoo system for maritime use.
- Separately, Hanwha and Magnet Defense are examining a containerised launcher for the H38 medium uncrewed surface vessel.
South Korean defence manufacturer Hanwha Aerospace and its American subsidiary Hanwha Defense USA are preparing to conduct two shipboard firing tests of Chunmoo guided rockets off the southern coast of the United States during November.
The programme will examine the feasibility of employing the land-based multiple rocket launcher system from a vessel, extending the technology into a maritime operating environment. Hanwha confirmed the planned firings on 9 November, but has not disclosed the test dates, vessel configuration, or detailed assessment criteria. The announcement concerns forthcoming trials rather than an already demonstrated naval capability.
Chunmoo was developed as a land-based rocket artillery system, with its launch equipment, control systems, and munitions integrated into a vehicle-mounted configuration. Moving that equipment onto a ship introduces different structural and environmental conditions, including vessel movement, vibration, the marine atmosphere, and the need to accommodate the launcher within a different platform arrangement.
A shipboard installation must provide suitable mechanical support for the launcher and its associated equipment. The position of the launcher, its connection to the supporting structure, and the effects of the maritime environment all require consideration during integration. Equipment developed around the characteristics of a land vehicle cannot automatically be assumed to retain the same performance or service life when installed aboard a vessel.
The planned tests will provide an opportunity to examine elements of that adaptation under firing conditions. Hanwha has identified two firings, although the number of rockets launched during each event and the complete test configuration remain undisclosed. A successful demonstration would establish evidence concerning the proposed maritime use of Chunmoo without replacing the broader qualification work necessary before the system could enter naval service.
Hanwha’s American maritime programme also includes cooperation with Magnet Defense, an autonomous vessel developer based in Florida. The companies established a strategic partnership in April 2026 covering the development and production of medium uncrewed surface vessels. Their proposed work includes a container-mounted Chunmoo launcher intended for integration with the H38 vessel concept.
The H38 is being developed as a medium uncrewed surface vessel, with the partnership identifying platforms approximately 38 metres in length. Incorporating a guided rocket launcher into such a vessel would combine remotely supervised or autonomous maritime operations with a weapon system originally designed for ground forces. That integration remains a development objective rather than an operational capability acquired by the United States Navy.
Containerisation could provide a standardised physical arrangement for handling and installing launcher equipment, but it does not remove the engineering requirements associated with shipboard operation. The vessel must accommodate the equipment’s weight, structural loads, electrical demand, and interfaces with other onboard systems. The launcher must also be compatible with the platform’s operating arrangements, including its navigation, communications, and mission-management equipment.
Uncrewed operation adds requirements for supervising the vessel and maintaining control over the functions associated with its mission. Autonomous navigation and weapon employment are separate capabilities, with different safety and authorisation requirements. A vessel may be capable of navigating without continuous manual control while still requiring human decisions and additional control arrangements for other functions. Hanwha has not disclosed the proposed weapon-control architecture for the H38.
Communications availability will influence the operating arrangements of any future armed uncrewed vessel. Remotely supervised platforms need a means of transmitting relevant status information and receiving authorised instructions, while interruptions to those connections must be accounted for in system design. The current announcement does not identify how a Chunmoo-equipped platform would manage degraded communications or the procedures governing its employment.
The November firing programme has not been confirmed as a demonstration aboard the H38. Hanwha has stated that the tests will use a vessel off the southern United States coastline, but has not identified it as the intended autonomous platform. The results will therefore need to be assessed against the specific configuration tested rather than automatically attributed to the separate uncrewed vessel concept.
Hanwha Defense USA has been expanding its American maritime activities through shipbuilding and technology partnerships. The group acquired Philly Shipyard in 2024, establishing a substantial industrial presence in the United States. In October 2026, the American subsidiary secured a US$269m contract through TOTE Services associated with construction of a medium landing ship for the US Navy and Marine Corps.
The company is also pursuing the acquisition of Austal USA, the American subsidiary of Australian shipbuilder Austal. Hanwha reported that principal due diligence activities had been completed and discussions concerning the transaction’s main terms were continuing. No completed acquisition had been announced in connection with the November Chunmoo testing plans.
These industrial activities cover different elements of maritime capability, including vessel construction, autonomous platform development, and weapon-system integration. Their combination could allow Hanwha to offer a wider range of equipment and services through its American operations, although the individual projects remain subject to their respective contracts, technical requirements, and customer decisions.
The immediate engineering milestone is the planned shipboard firing of Chunmoo guided rockets. The company has not announced a production order for the maritime launcher, a completed qualification programme, or a timetable for introducing a weapon-equipped H38 into service. Further development will depend on the evidence generated during the tests and subsequent platform-specific integration work.
