DNV, NAPA and Damen using 3D model to support ship design approval

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


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). 

The 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.

Specifically, the 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, according to the partners.

“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. 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,” Katarzyna Romantowska-Jaskólska, Manging Director at Damen Engineering, said.

“At NAPA, streamlining the hull structure approval process through efficient collaboration and swift feedback loops among stakeholders is one of our top priorities. As a result of several joint industry development projects, NAPA’s 3D design solutions can support efficient information exchange between ship designers and classification societies, enabling quicker and more accurate approvals. Our support for the OCX format is a key part of this effort, as it enables the standardized exchange of 3D model data and reduces the time and effort required for efficient communication,” Mikko Forss, Executive Vice President for Design Solutions at NAPA, added.

“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,” Ivar Håberg, Director of Approval at DNV, concluded.

OCX is a new standard for 3D model-based class approval, aimed at breaking down the barriers between different design and classification software platforms. The OCX 3D model can also replace the traditional 2D structure drawings for classification purposes.

The new 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.