Korean Register (KR), an IACS member classification society, has released the latest version of SeaTrust-LS, its container securing strength assessment software. SeaTrust-LS incorporates KR’s new 2018 guidance for container securing assessment, which reflects practical insights and feedback from lashing makers SEC Bremen and German Lashing Robert Böck
Achieving the optimum container stowage and arrangement is crucial to the safe operation of a vessel as it dramatically affects the trim, stability, and longitudinal strength of the ship. Optimum stowage will also maximise the economy of container handling. If the container stowage arrangements do not provide the required secured strength, then the loading and safety of containers can be significantly compromised.
Optimal container stowage and arrangement is even more critical with the trend towards ever-larger container ships. KR addressed this in its revised guidance by conducting ship motion analysis for different sizes of container ships, from 1,000 teu up to 23,000 teu. Analysis has included optimising accelerations, non-linear analysis for calculating accurate external lashing forces, and computational fluid dynamics (CFD) analysis under a range of scenarios relating to the application of reasonable wind forces.
SeaTrust-LS contains all the latest guidance. The updated version also applies the semi-non-linear calculation method to consider the twistlock separation effect of external lashing. This ensures the safe securing of external lashing, as well as faster computing time for lashing strength assessment.
Additional features include the calculation of optimal acceleration and wind force, together with 13 route reduction factors, enabling container ships to maximise their cargo capacities while ensuring ship safety.
SeaTrust-LS includes a feature to identify maximum cargo capacity automatically to help users easily optimise design stack weight, the lashing bridge design, and the container stowage arrangement.
Meanwhile, an auto-update feature ensures users are using the latest software and KR rules. The package also includes a software development kit allowing it to integrate easily with customer’s own software.