Japanese shipowner Nippon Yusen Kabushiki Kaisha (NYK) welcomed a new workboat to its harbour support fleet in a ceremony on Friday, May 23.
Designed without an onboard diesel generator, E-Crea will support the docking and undocking of tugs at the Koyasu facilities of local shipyard Keihin Dock, which built the workboat.
E-Crea is powered solely by batteries charged from shore facilities at the Koyasu shipyard. NYK said the vessel is significantly quieter compared to conventional ships running on fossil fuels, substantially reducing operational noise.
Measuring approximately nine metres in length, E-Crea consolidates all essential equipment within its compact hull. NYK said the design enables exceptional manoeuvrability in confined spaces, making it ideally suited for assisting with docking operations and vessel movement at shipyards.
Following the installation of the electric propulsion system, including substantial battery modules in the hull, the vessel’s weight exceeded initial projections. To maintain proper balance, the design team reconfigured equipment placement and cabling, thereby optimising internal space and ensuring safe, stable navigation.
To effectively manage heat caused by elevated temperatures from the batteries and electric motors, the design team implemented multi-layered water-cooling systems and integrated air ducts. Enhancements to the battery room include fireproofing measures and protection against hazardous gases, along with improved ventilation.
E-Crea has space for up to 14 people and is classed by the Japan Craft Inspection Organisation.