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We are a Certifying Authority appointed by the MCA and other Registries.

Code My Boat


Our approved measurers will produce a Certificate of Survey for Tonnage and Measurement.

Register My Boat


How to become a YDSA-qualified professional.

Membership Information

Courses & Events

Professional training courses and events.

What's On?

Here to help

Wheel Find a surveyor

Search for a surveyor by name, location or material.

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Helm Find a coding surveyor

Search for approved MCA coding surveyors worldwide.

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Helm Find a designer

Search for help with boat design, modifications and technical advice.

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Helm Find a measurer for registration

Search for an approved measurer in the UK or overseas.

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Helm Find an associate

Search for complimentary services such as marine insurance, legal and financial advice.

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Helm Find a Broker

Search our members to find an ABYA broker near you.

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What can a YDSA member do?

Helm Types of survey

From pre-purchase surveys to expert witness work.

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Helm Designer services

Professional boat design, modifications & advice.

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Helm Large yacht group

Services and advice for vessels over 24 metres.

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Helm Inland waterways group

Specialists on Inland Waterway crafts & regulations.

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About YDSA

The Yacht Designers & Surveyors Association (YDSA) is the UK’s professional association for surveyors and designers and is a world-renowned organisation for marine expertise.

Our Qualified Experienced Professionals have been setting the standards in the designing and surveying of yachts since 1912 and the YDSA’s worldwide network of independent specialists can be relied upon for their technical authority and professional integrity.

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