Process
Yacht Survey and Sea Trial Explained
What each one covers, what it costs, and how to use the findings.
6 min read · Updated
The survey and sea trial are the buyer's protection, and they are the part of the process where the biggest sums are saved or lost. They deserve more attention than they usually get.
In short
What does a yacht survey cover?
A condition and valuation survey covers hull structure, deck and superstructure, systems including electrical, plumbing and safety equipment, machinery condition, and an assessment of market value. It is conducted with the vessel hauled out so the underwater sections can be examined.
What happens during a sea trial?
The vessel is run through its full operating range while the surveyor records engine performance, temperatures and pressures, checks steering and stabilisation, tests navigation and communication equipment, and observes handling. It should not be a short harbour run.
How much does a yacht survey cost?
Costs scale with size and are commonly quoted per foot. For a large yacht, a full condition survey plus a separate machinery survey typically runs into the thousands or tens of thousands of dollars, plus haul-out fees. Against the purchase price it is a small fraction, and it routinely identifies issues worth many times its cost.
Choosing a surveyor
Instruct your own, and check accreditation — in the United States, SAMS and NAMS are the recognised bodies. Ask for a redacted sample report before engaging: report quality varies enormously and you are buying the analysis, not the visit.
For a large yacht, engage a separate machinery specialist. General surveyors are not usually engine specialists, and the machinery is where the largest costs hide.
What the survey should include
Beyond the standard scope, ask specifically for moisture readings on the hull and deck, oil analysis on main engines and generators, thermal imaging on electrical panels where available, and an assessment of any previous repair work.
- Hull moisture readings and, where relevant, ultrasonic thickness testing
- Oil analysis on main engines and generators
- Electrical panel inspection, ideally with thermal imaging
- Corrosion assessment and anode condition
- Safety equipment currency and life raft service dates
- Verification that previous repairs were properly executed
Making the sea trial count
Insist on a full-range trial rather than a run out of the channel and back. The engines should reach and hold their rated operating range, and the surveyor should record the numbers.
Attend if you can. The report tells you the yacht's condition; being aboard at speed in some sea state tells you whether you want it.
Using the findings
Almost every survey finds something. The question is whether the findings are routine maintenance items or material defects, and a good surveyor will distinguish them clearly.
Material findings are a renegotiation lever: a price adjustment, work completed before closing at the seller's cost, or an escrow holdback. Presenting them with contractor quotes rather than as a list of complaints gets a better result.
Put this to use
Frequently Asked Questions
Who pays for the survey?
The buyer, in almost all cases, including haul-out costs. It is the buyer's diligence and the buyer's report.
Can I use the seller's recent survey?
Read it, certainly — it is useful context. But do not rely on it. It was commissioned by someone whose interests differ from yours, and insurers and lenders will generally want a current survey in the buyer's name.
What if the survey finds major problems?
You can reject the vessel within the acceptance period and recover the deposit under the agreement's terms, or renegotiate. Serious findings are a reason to reassess, not automatically to walk.
How long does a survey take?
One to three days for the condition survey depending on size, plus the sea trial. Haul-out scheduling is usually the constraint on timing rather than the surveyor's availability.