Built by operators, not by optimists.
Full Fathom AI is a product of Propel Group, a digital transformation consultancy for energy and maritime. We build software we would deploy on our own fleet, in places where the wrong answer has operational consequences.
The only responsible AI onboard is cited AI.
In the middle of the night, on a vessel far from a port call, a crew member asks a question that has to be answered from the ship's own Safety Management System. A general-purpose chatbot will happily invent an answer. An unaudited RAG will hand-wave. Neither belongs onboard.
Full Fathom AI exists to give that crew member a cited, grounded procedure — the exact document, the exact section, the exact page. Every answer validated against the source before it is shown. If the context is insufficient, the system says so rather than guess.
It runs onboard so the SMS never has to leave the ship. It works when the link drops so the answer is always there. It was built this way because we have watched teams try the other ways and fail.
Five rules. Non-negotiable.
Every answer carries its source tier, document name, section, and page. If we cannot cite, we do not answer.
A sufficient-context autorater inspects the retrieved context independent of the generated answer. If the context cannot support the question, we say so.
Inference runs onboard. Query logs stay on the vessel by default. Only anonymous aggregates flow shore-side, and only when the operator has opted in.
Resilience, not disconnection. The product is at its most useful when the connection fails — that is when the crew has no second option.
Every answer shows its confidence and the signals that produced it. The crew makes the call. We give them evidence.
Propel Group International Ltd.
fullfathom.ai is a trading name of Propel Group International Ltd — a UK company focused on digital transformation in energy and maritime. The company was incorporated on 5 January 2026 and is registered at the address below.
- Legal name
- Propel Group International Ltd
- Trading name
- fullfathom.ai
- Company No.
- 16943846
- Jurisdiction
- England and Wales
- Incorporated
- 5 January 2026
- Registered office
- 71–75 Shelton Street, Covent Garden, London, WC2H 9JQ
Officer records are public at Companies House and verified on appointment.
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