Superyacht carbon and compliance ledger
One ledger for every voyage.
Sea Ledgers records your yacht's fuel, voyages and charters once. From that single record you go carbon neutral, track EU ETS and FuelEU, and get the reports your captain, manager and owner need.

What we do
Everything your yacht reports, from one record.
Go carbon neutral
Offset a voyage, a charter, a season or any amount. Every tonne comes from the ledger, and every purchase comes with a numbered Voyage Carbon Neutrality Certificate.
Learn moreEU ETS and FuelEU
For commercial yachts of 5,000 GT and above: allowances owed, FuelEU balance and quotes, updated as the season unfolds.
Learn moreThe ledger
One dataset per yacht: voyages, port stays, bunkerings, charters, emissions, tax and documents. Over 60 report types, each produced only where it applies.
Learn moreThe Logbook
The crew logs departures, arrivals, bunkerings and charters on a phone, even offline. The captain checks, the manager approves.
Learn moreHow it works
Set up once. Log as you sail.
- 1
Onboard once
One secure intake for the owner, the yacht management company and the vessel.
- 2
Log as you sail
The crew records each event as it happens. The captain checks it. The manager approves it.
- 3
See your position
Emissions, allowances and the FuelEU balance update with every approved entry.
- 4
Act in one place
Offset, request an EU ETS or FuelEU quote, and download certificates and reports.
The Logbook
The crew logs it. The ledger does the rest.
Departures, arrivals, noon reports, bunkerings with the delivery note, charter start and end, environmental records and customs events. Forms are prefilled, entries work without a connection and every step is recorded in a tamper-evident audit trail.
- Crew enters, captain checks, manager approves
- Months lock when they are closed
- Approved entries feed the ledger straight away
Who it is for
Built for the people who run the yacht.
Owners and family offices
One clear view of the yacht's footprint, obligations and certificates.
Yacht management companies
One contact, one invoice and one login across the fleet.
Captains and crew
A logbook on the phone instead of spreadsheets and email chains.
Charter brokers
Carbon neutral charters for guests, with commission for the life of the account.
Private records, public proof
Your data stays private. Your claims stay provable.
Client records are private: only your team and Sea Ledgers see them. Each certificate carries a number and a QR code, and credits are retired on the Orbex registry so every tonne can be checked.
- Role-based access for owners, managers, crew and verifiers
- Every document stored with its digital fingerprint
- A tamper-evident audit trail for every entry
See it on a demo yacht.
Explore M/Y EXAMPLE XL, a fictitious 6,200 GT yacht, with its full ledger, Logbook and compliance pages.