Sea trial — FAQ

A sea trial is the only opportunity to assess the vessel under real operating conditions — how the engine performs under load, how the boat handles, how systems behave when everything is running at once, and whether there are any noises, vibrations or characteristics that only appear when the boat is moving. An independent surveyor is aboard to have the boat put through those conditions deliberately and record what it does.

Within a full pre-purchase survey, one hour is included: enough for the items that matter most — machinery under load, steering, systems, and time under sail where applicable. A standalone trial usually takes two to three hours, depending on vessel size and what needs to be assessed. It is for learning the whole boat in depth: assessing it against a sailing programme or intended use, scoping the work before a refit or a sail change, or checking it after a refit or major changes. An extended trial within a survey is charged separately.

Yes — one hour of sea trial attendance is included as standard in a full pre-purchase survey, and findings are integrated into the survey report.

Storage, weather or timing can rule one out on the day. A standalone sea trial can be arranged separately, with an independent written report.

Engine start behaviour and warm-up, oil pressure and temperature under load, cooling system performance, propulsion and manoeuvrability, steering response and feel, sail handling systems on sailing yachts, and general noise or vibration characteristics that can indicate mechanical concerns.

Yes. Beyond purchase assessments, trials are useful after engine work or repairs, or to verify general operational performance.

Enough to test the boat and not so much that it hides what is being tested. A sailing yacht needs wind to sail; a motor yacht needs sea room and a stretch of calm water to run the engines up to rated RPM and hold them there. Fog, a heavy sea or a gale mean the trial is postponed rather than run for the sake of it — a trial that could not test the boat tells you nothing you can act on.