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CelesteOS

Control over your complexity.

On most vessels, operational knowledge lives in the crew — not the vessel. When the chief engineer leaves, a year of fault history, supplier context, and system understanding leaves with them. The next engineer inherits equipment, not context.
Nothing to install. Onboard in hours, not weeks. Runs alongside your existing PMS — nothing to replace, nothing to migrate. Unlimited seats per vessel; pricing is per vessel, not per user.
Work orders. Faults. Parts. Inventory. Warranties. Certificates. Hours of rest. Handover. Search. Ledger. One interface.
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See how it works
Used during live faults — when the previous engineer’s knowledge is no longer available
Used during Port State Control inspections — records exist and are trusted, not assembled under pressure
Used during handovers — eight months of operational context, not two days of verbal briefing
Used when decisions cannot be reversed — every action explicit, signed, permanently recorded
The product — search in use
CelesteOS
MY Celeste · 38m
Chief Engineer
port engine alarm — previous occurrence
F-2847 · Port Engine High Temp Alarm
Diagnosed by R. Chen · 14 Mar 2026 · Coolant header tank low — topped up, root cause: hose clip failure P3
Closed
F-2591 · Port Engine Temp Alarm (prior)
Diagnosed by T. Walsh · 02 Nov 2025 · Same system. Impeller replaced. Recommend checking hose clips at next service.
Closed
Port Engine — Maintenance Record
MTU 12V 2000 M94 · Last service 06 Jan 2026 · Next due 06 Jul 2026 · 1,247 hrs since service
Record
3 records · 2 fault history matches · Sources: fault log, maintenance history · All records immutable
CelesteOS keeps the vessel’s operational knowledge in the vessel. Every fault, every diagnosis, every decision — recorded against the vessel, not the person who made it. Search is the interface. Nothing changes without review, signature, and record.

Philosophy

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Most systems expect crews to know where things live. That fails under pressure, fatigue, and rotation. CelesteOS removes navigation entirely. Every manual, work order, fault record, and email — searchable as a single operational record. The vessel's knowledge stays in the vessel.
Alex Short, founder of CelesteOS — former superyacht ETO
Built by Alex Short, a former ETO. The rotation gap, the lost handover, the 3am alarm with no fault history — not market research. Personal experience.
Ask. Review the source. Act.

What the vessel keeps when the crew leaves.

(02)
The four things every chief engineer should be able to find — without asking the person who left.
The handover that writes itself.
CelesteOS handover — signed and ready
Search like you'd ask.
CelesteOS search — natural language
Every action, recorded. Immutable.
CelesteOS ledger — immutable signed actions
Comprehensive Fleet.
CelesteOS fleet — comprehensive vessel view
Rough notes become a structured handover with full context — signed by the engineer who did the work, searchable by whoever inherits the vessel. Captain handovers visible only to the back-to-back and fleet manager. Role-based throughout.
Type what you would say to a colleague. Get the exact manual page, the related work order, and the email thread — together, with provenance.
Every read, every write, every signature — timestamped, attributable, append-only. The audit trail is not a feature. It is a legal defence.
One pane across an entire fleet. Shore office sees what every vessel sees — not a curated weekly report.

What it delivers

(03)
CelesteOS search — idle state
(01)
Search naturally
Search replaces orientation
Crew don’t learn software structures or legacy quirks. Ask like you would to any experienced crew member.
CelesteOS search — grouped results
(02)
Consolidate your fragmented systems
No matter the source, we’ll find it
Manuals & drawings (with revision/page), work orders & faults, parts & inventory, notes & handovers, and email — in one interface.
CelesteOS handover export — rendered document
(03)
Handover without gaps
You review, we create
Handover drafts link the exact manual pages, work orders, and parts used — assembled automatically from real work. Data continuity.
CelesteOS receipts — cryptographically sealed, independently verifiable
(04)
Proof, when proof matters.
verifier.celeste7.ai
Every PMS produces records. Few produce proof. CelesteOS seals every action — fault, handover, work order, signature — into a cryptographic receipt that anyone can independently verify. The audit trail is not a feature. It is a legal defence.

Measured.

(04)

99.99

%

Uptime target · pilot infrastructure

0

knowledge lost by crew change

1

Memory that withstands crew rotation
Cloud-hosted for the pilot. Offline sync is the next phase — designed for vessels at sea.
Ledger
See your recent work. Instantly.
Every manual page, work order, email, and note you touched is recorded. Jump back to the exact point you left off — without re‑searching or retracing steps.
CelesteOS ledger — recent activity history
CelesteOS related context — grouped results
Related context
See what's connected. Immediately.
Open any document and Celeste surfaces what's related — work orders, parts, equipment, handovers, and correspondence. Stay oriented without leaving the page.
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Onboard in hours. Not weeks.
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Your existing manuals, PDFs, scans, exports, and emails are indexed as they are.
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No migration projects. No reformatting exercises.
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The vessel’s record becomes searchable immediately.
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Pilot access is limited.

Onboarded in hours, not weeks. One vessel at a time. For teams who intend to use Celeste as the work surface.
Request pilot access