Damen, DNV and NAPA are taking a major step forward in ship design processes by using the new Open Class 3D Exchange (OCX) standard to streamline classification involvement. The standard is used in the early phase of a project.

With increasing pressure to deliver vessel designs quickly, the early engagement of classification societies can increase designer and owner confidence in the concept design and ensure a smooth project execution.

Responding to market expectations, Damen Engineering decided to involve DNV classification experts in the first review of its new design of a Commissioning Service Operation “Walk-to-Work” Vessel (CSOV 9020). Collaboration started during work on the Design Proposal, the very first stage of the project, using new technology based on 3D model exchange and approval through the OCX file format.

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3D ship design

The new CSOV design was developed by Damen engineers using NAPA’s 3D design tools, which enable the export of 3D models in the OCX format. This functionality allowed Damen and DNV to work in parallel on the same 3D model, saving the time and effort needed to agree and prepare 2D documentation.

‘Environmental, safety, regulatory and other external pressures, combined with the competitive need to create ever-better designs, mean doing things the way we always did them is no longer sufficient,’ says Katarzyna Romantowska-Jaskólska, Manging Director at Damen Engineering. ‘The OCX format allows us to take a new approach that is beneficial to everyone involved in the development of a vessel design, and the project execution process. In collaboration with DNV and NAPA, we arrived at a solution that connects disciplines and facilitate quick decision making while reducing risks in the early stages of a design.’

Ivar Håberg, Director of Approval at DNV, adds: ‘The earlier class starts the design approval process, the easier it is to find good rule compliant design solutions in cooperation with the yards. By using the OCX file format to exchange information on 3D design models, DNV can more efficiently interact and cooperate with the designers and yards already in the early design development phase.’

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OCX is a new standard for 3D model-based class approval, aimed at breaking down the barriers between different design and classification software platforms to enable the seamless exchange of idealised geometry and metadata between them. The OCX 3D model can also replace the traditional 2D structure drawings for classification purposes, thereby saving time for the yards, and allowing class to respond more quickly to designers’ needs.

The OCX standard is the result of the joint industry project “Approved (2016-2020)” headed by DNV. The standard is now jointly owned and managed by the OCX Consortium established in 2021 (https://3docx.org). This consortium has brought together more than thirty industry leaders to jointly promote and maintain the standard. The consortium members consist of all the major classification societies, leading CAD providers and several designers and yards.

Picture: Model of CSOV9020 taken from Napa Designer.

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