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Tonnage certificate Translation
Our team of sworn translators prepares your tonnage certificate translation for notarisation where the receiving institution requires it. We provide information about apostilles and consular legalisation; we do not submit or manage these applications.
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A tonnage certificate is a measurement document showing a vessel's gross and net tonnage, used as the basis for port charges, canal transits and many official procedures. Vessels on international voyages use an International Tonnage Certificate issued under the 1969 Tonnage Convention.
In the translation, tonnage values, measurement details and the vessel's main dimensions are reproduced exactly without rounding. Units of measurement are preserved; tables follow the source layout so the port authority can match the values directly.
Which institutions request this document?
- Foreign port authorities and canal administrations
- Flag administrations — in registration files
- Classification societies and survey companies
- Law firms representing parties to ship sales, purchases and chartering
Certification requirements
A sworn translation is usually sufficient for port procedures; notarization may be required for registration and sale files.
It is rarely required; if the destination country's administration requires it, the chain is planned using the original document.
There is no universal rule. The institution requesting the document determines its certification requirements. The information above describes common practice. Tell us which institution you are applying to and we will help clarify the required certification.
Preparing your document
- Send a complete scan in which the name of the issuing administration or organization is legible
- If you send it with the ship registry certificate, the vessel details are cross-checked
- Specify the country and institution where the document will be used
Frequently asked questions
How are the expressions for gross and net tonnage translated?
The established international terms are gross tonnage (GT) and net tonnage (NT); the values are preserved exactly and no unit conversion is performed.
Is my old tonnage certificate still valid?
Validity depends on the requesting administration's rules. If modifications affecting measurement have been made to the vessel, administrations require a current document; confirm this requirement before translation.
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