ClassNK begins pilot testing of 3D Model-Based Approval system with Japanese shipyards

ClassNK has launched a joint pilot test with ten Japanese companies for its drawing approval system ‘NK-PASS’ and the ‘ClassNK 3DViewer', both compatible with 3DMBA (3D Model-Based Approval), scheduled for official release in spring 2026. 

3DMBA is an approach in which approval processes are centred on 3D models instead of conventional 2D drawings, and its adoption is expanding globally. By utilizing 3D models, it is expected to enhance visualization and accuracy for information that was difficult to identify in traditional processes, as well as enable faster detection of design changes and potential errors.

The new systems are being developed to support the  transition from the conventional 2D drawing-based approval process to a new  workflow centered on 3D models. In particular, they are designed to accommodate the internationally standardized OCX (Open Class 3D Exchange) format, contributing to digital transformation across the shipbuilding industry

Participating Companies in the pilot test are: Oshima Shipbuilding, Kawasaki Heavy Industries, Shin Kurushima Sanoyas Shipbuilding, Shin Kurushima Dockyard, Tsuneishi Solutions Tokyobay, Tsuneishi Shipbuilding, Hakodate Dock, Namura Shipbuilding, Nippon Shipyard and Mitsubishi Shipbuilding.

Under the cooperation of the ten participating companies, the pilot test will focus on:

• Verification of 3DMBA-compatible functionalities

• Verification of data interoperability using the OCX format

• Verification of practical operations combining 3D models with supplementary 2D drawings as needed during the transition phase

Through this pilot testing, ClassNK aims to identify operational challenges and advantages of 3DMBA and refine the system in preparation for its official release in spring 2026.