Ensuring that containers reach their destinations safely without being lost at sea is a fundamental priority in container shipping. To secure containers weighing tens of tons, workers traditionally use steel rods to manually fasten them in place. This process is known as “lashing.” Because lashing relies on manual labor, there are inherent limitations to how securely containers can be fastened. When a vessel encounters high waves or strong winds, excessive movement can place substantial loads on containers and their securing devices, potentially causing containers to fall overboard. According to the World Shipping Council (WSC), an average of 1,274 containers have been lost at sea annually over the past decade, representing approximately KRW 1 trillion in cargo value. The consequences of container losses extend beyond the loss of cargo itself. Containers floating at sea or submerged just below the surface can collide with passing vessels and damage their hulls. If lost containers carry hazardous materials, their contents may leak into the ocean, causing marine pollution. In addition, lashing is labor-intensive and time-consuming, as workers must manually fasten and release the lashings securing each container. The process also presents safety risks, with workers required to operate on slippery decks and work at heights to secure stacked containers. HD Hyundai has developed an innovative “Lashing-Free” container ship designed to address these challenges. Its defining feature is a redesigned vessel structure that securely holds containers in place without the need for manual lashing. HD Hyundai Heavy Industries was the first in the world to develop the technology, while HD Hyundai Samho recently built and successfully delivered the first vessel featuring the technology to a French shipping company. Extended Cell Guides Eliminate Manual Lashing, Prevent Cargo Losses and Improve Loading Efficiency On conventional container ships, containers are first loaded into cargo holds fitted with structures known as “cell guides.” Designed to accommodate container dimensions, these guides act as rails that keep containers vertically aligned and prevent lateral movement, eliminating the need for additional securing. Once the cargo holds are loaded, hatch covers are put in place, and additional containers are stacked on top and secured using conventional lashing methods. HD Hyundai's Lashing-Free container ship takes a different approach by extending the cell guides from the cargo holds to above deck. Once containers are loaded into these extended guides, the vessel's structure holds them securely in place without the need for manual lashing. This design significantly reduces the risk of containers being lost overboard, even in rough sea conditions, helping prevent cargo losses and associated marine pollution. Integrated into the hull structure, the extended cell guides also enhance structural strength and reduce vibrations during operation. To replace conventional hatch covers, HD Hyundai developed a standardized “Portable Bench” that can be installed between cell guides. This design eliminates the structural discontinuity between the cargo holds and the deck above. HD Hyundai also developed and incorporated a “Twistlock Rooting System” to further improve loading efficiency. The system securely fastens containers stacked above the cell guides. The system uses twistlocks to securely connect containers stacked above the cell guides with those positioned inside them. This allows the interconnected containers to be firmly anchored to the vessel's structure through the cell guides, much like roots extending into the ground. As a result, even containers stacked above the cell guides can be securely held in place without the need for manual lashing. This structural stability also increases the vessel's on-deck cargo carrying capacity by more than 10% compared with conventional vessels of the same type, giving shipowners greater flexibility in cargo stowage planning. Standardized 40-Foot Portable Bench Supports Automated Terminal Operations Conventional hatch covers serve two primary functions: preventing seawater from entering the cargo holds and distributing the weight of containers stacked on deck across the vessel's structure. HD Hyundai's newly developed Portable Bench is designed to fit between cell guides while performing the same functions as a conventional hatch cover. Furthermore, the Portable Bench has the same dimensions as a standard 40-foot container, allowing terminal cranes to handle it in the same manner as ordinary containers during loading and unloading operations. Because no dedicated equipment or specialized handling procedures are required, it is compatible with existing port cargo-handling systems. The Portable Bench is also well suited for use at automated terminals, where cranes perform loading and unloading operations based on standardized container dimensions and positions. As more ports adopt automated systems, these advantages are expected to become increasingly significant. HD Hyundai's Lashing-Free container ship received the IR52 Jang Young-shil Award in January 2026, one of Korea's most prestigious industrial technology awards, presented by the Ministry of Science and ICT and organized by the Korea Industrial Technology Association. The technology was also introduced in 2024 as a representative Korean technology for preventing container losses at sea during the 10th session of the International Maritime Organization (IMO) Sub-Committee on Carriage of Cargoes and Containers (CCC). Building on its industry recognition, HD Hyundai has successfully commercialized its Lashing-Free technology with the delivery of the first vessel equipped with the system. By eliminating manual lashing while enhancing safety, loading efficiency and compatibility with automated port operations, the technology could set a new standard for container ship design. HD Hyundai will continue driving technological innovation to enhance vessel safety, cargo loading efficiency and automation, further strengthening its competitiveness in the global shipbuilding market.