The Tonnage Survey Explained
The tonnage measurement survey is a fundamental part of the yacht registration process under Part I of the British Register of Ships or any other credible register of title.
The tonnage measurement survey results in the generation of a unique ‘Certificate of Tonnage and Measurement’ or ‘Tonnage Measurement Certificate’ for the yacht being registered.
The certificate is submitted to the owner’s registry of choice to provide the registry with independent professional verification of the existence of the vessel and confirmation of its physical and technical characteristics.
British Merchant Shipping Laws require all yachts registered under Part I of the British Register of Ships to have been surveyed by a recognised surveying authority or classification society prior to being registered.
The tonnage survey report provides the registry with the tonnage, dimensions and engine specifications that will appear in the register and on the yacht’s Certificate of British Registry.
The tonnage and dimensions of the yacht will determine the application of legislation such as safety and manning requirements, in addition to providing the basis for the calculation of fees or taxes affecting the vessel, such as mooring fees and harbour dues.
A tonnage survey is necessary even for a yacht which may be one of a class or from a production line, (where measurements may have already been taken for a nearly identical vessel).
This is because principal statistics can differ between production yachts and certain unique information will apply to a vessel, such as the Hull Identification Number (HIN), in addition to the engine identification numbers and specifications.
Above all, it should be remembered that the survey is required on a production yacht to evidence the vessel’s existence.