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Tonnage Measurements

Tonnage Measurements

At Marine Sea Services, we are approved to undertake Tonnage Measurements on vessels of up to 24m Load Line Length (LLL), for British Registration through Mecal & SCMS. Note that the Length Overall (LOA) may be over 24m.


Part 1 Registration requires re-registration every 5 years but does not require a further Survey for Tonnage and Measurement. This is dealt with directly between the vessel owner and the Registry. A new Certificate of Survey for Tonnage and Measurement will be required if there are changes to your vessel (for example, an engine change).

Reasons for Part 1 vessel registration:

  • Evidence you own the vessel

  • Shows your vessel’s nationality

  • Use the boat as security for a marine mortgage

  • Entitles you to protection from the Royal Navy and the services of British Consuls

  • Provides internationally accepted documentation to ease passage to foreign ports

  • Can enhance the re-sale of your vessel

  • Provides evidence of the date of the build

  • Ensures that your boat’s name is unique on Part 1

For more information, contact us at Marine Sea Services.

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Working on behalf of a Certifying Authority authorised by the MCA (MECAL)
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