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Technical drawing of motor yacht for marine survey.

Motor and sailing
yacht surveys

For pre-purchase, insurance,
new-build, refit, and tonnage measurement

Pre-purchase surveys

We send a list of requests to gather information in advance, and to help the owner or broker prepare the boat.  We will inspect from keel to mast, bow to stern, inside and out.   

The boat must be lifted so that we can check the hull, keel, rudder, propulsion, and other items, like stabilizers and thrusters.  We use appropriate methods – percussion testing, moisture detectors, ultrasound, depending on hull material and build method – to gather more information about the condition of the composite or alloy.   

Inside, we look for evidence of structural deterioration or accidents.  Is stiffening intact, joinery aligned, deck securely bonded to the hull?


The deck itself is crucial to the boat’s structure and appeal.  Materials and fittings are assessed, hatches opened, lazarettes entered, windlass and winches operated.   

Systems and machines – engines, generators, stabilisers, watermakers, pumps, batteries, plumbing, air conditioning, and so on - are important to the boat’s safety and value.  We observe their operation and during a sea-trial emulate real use, as far as possible.  A thorough visual inspection and maintenance review adds to the picture.  Are components installed to a standard, are they looked after, are they about to break? 

On sailboats, rigging is inspected following a checklist compiled from manufacturers guidance.   

Our findings are presented in a thorough, clear, illustrated report, with a short summary.  We talk you through it and provide support until your decision is made.  

Motor yacht in travel lift for inspection.

New build, refit, pre-delivery

Both yacht owners and yards can achieve better outcomes with a pre-delivery inspection. The scope is similar to a condition survey, but even more time is spent on finishing.


After all, owners expect the boat to be perfect on arrival, and we aim to help with that as far as possible. We will also sea-trial the boat, to check performance characteristics like top speed; and check the specification onboard, to make sure all items paid for are delivered. If we have been involved during the build, we will keep records of materials and environmental conditions, and help work through the compromises that yacht design brings.


Our role is collaborative, not combative. We work closely with owners and builders to help navigate the delivery of complex, luxurious machines floating in corrosive liquid (saltwater).

Image by redcharlie

Coding - flag inspections

Commercial yachts must comply with their flag states' regulations for condition, maintenance, equipment, and operations.  If you go through this process, we will send you a list to help prepare the boat, supported by phone if needed.


When you’re ready, we come to survey the boat. Normally there are a few issues to fix before we process paperwork and send it to the flag office. When all is done, you receive your commercial certificate

Large yacht engine room
Tonnage measurement

Tonnage measurements

Before you can use a yacht, it usually has to be registered.   And to register it, most reputable flag states require a tonnage measurement.  We visit the boat, take the measurements, record its identity, and submit paperwork to the relevant authorities.

What is tonnage measurement?

Sailing yacht technical drawing for marine survey
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