The Sea Trial Protocol: What We Test Before We Hand Over the Keys

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The sea trial is the moment a phinisi stops being a build and becomes a boat. It is where months of craftsmanship meet measurement — where every system is proven under load before the keys change hands. Here is what a proper trial protocol covers, and why nothing leaves the beach without one.

The systems under load

A sea trial runs for a few hours and puts every major system to work at once:

• Main engine and gearbox at cruise and full load, with shaft and propeller checked for vibration.
• Steering gear and rudder through full movement and response.
• The rig set and worked, on a sailing or motor-sailer build.
• Generators, electrical, air-conditioning and the watermaker under real load.
• Bilge and fire systems, and a constant watch for leaks and vibration under way.

Recording the data

A trial is only useful if it is measured. Engine temperatures and pressures, speeds and fuel burn, generator performance and any vibration are recorded, giving the owner a baseline for the vessel’s life and the evidence that supports certification . A trial done on impressions alone proves nothing.

Clearing the snag list

No first trial is perfect — a fitting weeps, a pump hums, a door sticks. Every fault is written into a snag list, corrected, and re-checked. The vessel is handed over only when the list is clear, so what the owner receives is a finished, tested boat, not a set of jobs still to do. This discipline is part of our honest reporting policy .

Handover

With the trial passed and the snag list clear, the class and registration documents are handed over and the vessel is the owner’s. It is the last of the four build milestones — and the one that turns a signed contract into a boat you can sail away.

The paperwork that travels with the boat

The trial produces a record that stays with the vessel for life: baseline performance data, the cleared snag list, and the evidence that supports certification . Future surveys, insurers and buyers all lean on that record, which is why we document the trial properly rather than treating it as a formality before the party.

From trial to first season

A good sea trial sets up a smooth first season. Problems found and fixed at the dock do not become breakdowns on a paying charter, and the crew learns the boat during commissioning rather than under pressure with guests aboard. It is the last of the four build milestones , and the one that makes the handover real.