Lloyd's Register Publishes First Guidance for 3D Model Class Approval

Lloyd's Register has published what it believes is the maritime industry's first dedicated guidance for using digital 3D models in classification approval. The LR-GN-066 Guidance Notes provide shipyards, designers and owners with a structured framework for using intelligent 3D models instead of traditional 2D plans during early structural plan approval. The move reflects the shift toward digital-first ship design, allowing clients to make greater use of digital assets they already create and maintain throughout a vessel's lifecycle.

 

Details of the Guidance

 

Lloyd's Register has issued a new set of guidelines. These support the use of intelligent 3D models in classification approval. The guidance is designated LR-GN-066 Guidance Notes for Digital 3D Models. It targets shipyards, designers and owners across the industry. The publication provides a practical framework for these users.

The society describes it as a first for the industry. It believes this is the maritime industry's first dedicated guidance of its kind. The guidance focuses on the early stages of structural plan approval. It offers a structured alternative to traditional 2D plans. This positions the society at the forefront of digital classification.

 

The Shift Toward Digital Design

 

The guidance responds to changing industry practice. The maritime sector is moving toward digital-first ship design and review. 3D models are becoming the primary source of engineering information. This applies across design, construction and manufacturing workflows. The publication reflects this growing use of digital design environments.

However, a gap exists between design and approval practice. Current class approval of designs still uses 2D shipbuilding plans. This creates a mismatch with modern digital workflows. Designers work in 3D but must submit 2D plans for approval. The guidance aims to bridge this gap between practice and process.

 

What the Guidance Covers

 

The guidance defines detailed requirements for digital models. It explains how 3D models can support the structural plan approval process. It also defines the characteristics such models should possess. This provides clarity for both designers and reviewers. The framework establishes consistent expectations across the industry.

The scope of the guidance is comprehensive. It covers file formats and model organisation. Metadata requirements and levels of structural detail are included. Revision control and submission requirements are also addressed. Together these elements provide a consistent framework for all parties.

 

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Benefits for the Industry

 

The guidance offers clear advantages for shipyards and designers. Many already work in 3D design environments. The guidance provides a clearer route for integrating these models. This allows them to feed directly into the approval process. It removes the need for separate approval-specific assets.

This approach reduces duplication of effort. The framework encourages using models already embedded in existing workflows. Rather than creating additional digital assets solely for review, clients reuse existing ones. This helps reduce duplication across design and approval. It also improves consistency between design, production and approval activities.

 

Flexibility and Scope

 

The guidance is designed to be adaptable. It is voluntary and non-prescriptive in nature. It applies across various software ecosystems used in the industry. This accommodates the different tools that shipyards and designers use. It also allows for alternative methods and technologies that may emerge.

The guidance has a defined but expandable scope. It applies primarily to hull structures at present. It supports the use of 3D models during structural plan approval. The framework may be extended to other disciplines using similar assets. However, final approved 2D construction plans remain required for formal completion.

 

Ongoing Development

 

The society intends to continue developing the approach. It will collaborate with shipyards, designers and software providers. This collaboration aims to test and adopt new digital approaches. These would be incorporated within the existing guidelines. The goal is to continually improve the approval process.

Company representatives emphasised the value of existing digital work. The most complete representation of a vessel now often exists digitally. Defining what information to include gives clients greater clarity. This helps them use digital assets to support class approval. It maximises the value of work they are already doing.