CMN Naval shipbuilding · Cherbourg, France

CMN, a French naval shipbuilder, returns for a second engagement.

Constructions Mécaniques de Normandie has built more than 450 vessels at Cherbourg since 1946, and every one ships with a technical library that has to be assembled, checked and kept coherent for decades. CMN first engaged Sea-Squad to generate handbooks from a company knowledge repository of millions of documents, and came back for a second engagement.

Programme
Handbook generation from a company knowledge repository of millions of documents
Since
2025
Agents
Marine-GPT, Legal-GPT (early access)
Deployment
On-premises hosting
Defence-grade documentation, handled with defence-grade care.
Hull lines-plan
Class survey report
Weld inspection log

The challenge.

A shipyard's knowledge lives in millions of documents: class rules, supplier manuals, drawings, test and trial records, previous programmes' handbooks and the contractual set that binds them. Producing a new technical handbook meant engineers searching that repository by memory, copying from earlier programmes, and reconciling versions by hand. It was slow, it depended on a few people who knew where things were, and every regulatory update reopened the work.

What we deployed.

Knowledge repository ingestion

Millions of documents read and indexed on CMN's own infrastructure, with tables, identifiers and revisions preserved and every passage traceable to its source.

Handbook generation

Draft handbooks assembled section by section from the repository against CMN's templates, with the source document and page cited on every paragraph for the engineer to accept, edit or replace.

Regulatory and contractual cross-checking

Marine-GPT answers class and flag questions against the programme's own documents; Legal-GPT surfaces obligations and acceptance criteria from the contractual set with the clause behind each line.

On-premises deployment

The whole stack, including the models, runs inside CMN's environment. Nothing leaves the yard.

How it runs, day to day.

An engineer opens a new handbook chapter; the draft is already assembled from the repository, each paragraph pointing at the document it came from.

A class circular lands; the team asks what it changes for the vessel in build and gets the affected procedures and drawings in one answer.

The chapter is reviewed, corrected where the engineer knows better, and published with its sources attached instead of rebuilt from scratch.

Outcomes.

2ndengagement with the same team
Millionsof documents searchable and citable
On-premnothing leaves the yard

Assembling a precise technical document from millions of documents used to be weeks of searching and reconciling. With the platform it is a review.

CMN

See it on your fleet.

A working session with your vessels, your inbox and your documents. No slides.