Lloyd’s Register (LR) has published what it believes is the maritime industry’s first dedicated guidance for using digital 3D models in support of classification approval through Regs4ships, marking a significant step towards digital-first ship design and review processes.

The new “LR-GN-066 Guidance Notes for Digital 3D Models” provide shipyards, designers and owners with a framework for using intelligent 3D models in lieu of traditional 2D plans during the early stages of structural plan approval, the company said in a press release.

Joao Estevens, senior specialist at Lloyd’s Register, said: “For many projects, the most complete representation of a vessel now exists in a digital model.”

“By defining what information should be included, how it should be structured and how it can be reviewed, we are giving clients greater clarity on how to use those digital assets to support class approval and maximize the value of the work they are already doing,” added Estevens.

The publication reflects the growing use of digital design environments in modern shipbuilding, with 3D models becoming the primary source of engineering information across design, construction and manufacturing workflows.

LR said that its new Guidance Notes aim to bridge that gap between established 2D shipbuilding plans and 3D models in classification approval, helping clients make greater use of digital assets they already create and maintain throughout a vessel’s lifecycle.

The guidance sets out how 3D models can be used to support the structural plan approval process and defines the characteristics such models should possess.

According to the press release, it covers file formats, model organization, metadata requirements, levels of structural detail, revision control and submission requirements, providing a consistent framework for both designers and class reviewers.

For shipyards and design offices already working in 3D environments, the Guidance Notes provide a clearer route for integrating those models into the approval process.

LR stated that the framework encourages the use of models that are already embedded within established design and manufacturing workflows, helping to reduce duplication and improve consistency between design, production and approval activities.

Use of the Guidance Notes is voluntary and non-prescriptive, and the framework is intended to be applicable across a variety of software ecosystems.