The new OCX is partially based on those data models, but when derives in important aspects. The geometry representation is much more lightweight than a STEP model, the files are written in XML format. Information that the classification societies need for their work, such as wall thicknesses, material qualities and profile types, is transferred as metadata. But it does not include, for example, block divisions or profile end cut information used for detailed design and manufacture.
The limitations of the OCX format are, as explained at the beginning, very much intended. Nevertheless, thought is being given to other use cases beyond the exchange of data between shipyards and classification societies. Shipyards could, for example, transfer models to the operators so that they could use them during as a basis for maintenance, repair or overhaul work.
First, however, it is intended that the standard be extended to support round trips in communication between classification society and shipyards. The goal is to extend it with commenting capability so that designers see remarks directly their design system. This would significantly speed up design iteration.
Man-Months of Savings
OCX can save shipyards and design companies man-months of time needed to create drawings drafting and/or special models for the classification societies. If needed, the latter can make direct use of the OCX data for calculations and no longer need to create separate 3D models for this purpose. It is therefore not surprising that the new format is becoming increasingly popular.
The new standard has achieved a higher level of acceptance in four years than shipbuilding STEP standards ever achieved in the last 20 years. The vendors of NAPA, AVEVA Marine, and CADMATIC have in the meantime implemented corresponding interfaces in their systems – and not only for data export but also for import, thus making round trips possible. Hexagon will soon be presenting an OCX interface, something that the other manufacturers are also working on. PROSTEP offer OCX integration for some design systems that do not support the format. We are also developing special tools, like embedding OCX in 3D PDF documents so that they can be visualized offline on a tablet computer.
If you would like to find out more about OCX and our solutions, please feel free to contact us.