Wooden Yacht Sea Trial — Engine Hours, Rigging, Electrics and Safety Gear Under Way

By Wooden Yacht For Sale Editorial Desk

A wooden yacht sea trial runs alongside the condition survey so that engine, generator, steering, rig and electrics are judged under load before acceptance. The MYBA 2021 MOA requires the deposit to sit with a stakeholder before trial or survey begins. Write the schedule, duration, sea area and pass criteria into the contract, and keep haul-out separate.

A sea trial is your one chance to see the boat working rather than resting. On timber, that matters twice over, because a hull that looks calm at the dock can behave differently once loads come on. Use this as a working plan for the day.

Why do survey and sea trial belong together?

Passion Asset Advisory says a sea trial should be carried out together with the survey, so that hull, engines and systems are assessed before the buyer accepts. Doing them close together also stops arguments about what changed between the two.

Ideally the sequence runs like this: the surveyor inspects at the dock, opens what can be opened and records bilge levels; the boat goes out; then the surveyor looks again at the same spots. A later haul-out then checks anything the trial raised.

Our wooden hull survey checklist covers the structural side. This page covers what happens under way.

How do you arrange it with the seller, surveyor, crew and insurer?

Settle these before anyone leaves the dock:

• Deposit. Under the MYBA form, the deposit must reach the stakeholder before trial or condition survey goes ahead. Keep that order on any contract.
• Who commands. The seller's captain normally stays in command. Agree the test plan with them in advance.
• Insurance. Ask for confirmation that the boat is covered for the trial, with you and your specialists on board.
• Permits. Ask whether port clearance is needed for the route you plan. Fuel, crew and sailing approval all need to be in order.
• Weather limits. Agree what conditions would make the test meaningless, and what happens then.
• People. Include your surveyor and, where the boat justifies it, an engine or rig specialist.

Ask too for the engines not to be warmed up before you arrive. BVI Yacht Sales recommends observing a cold start, since warm engines can hide starting problems.

What should you check on the engine and generator?

Note the hour meter readings first, and compare them with the service records. Then work through the load range. Global Yacht Guide suggests holding cruise RPM long enough to stabilise temperatures and pressures, often 30 to 60 minutes where conditions permit, and a brief run at maximum rated RPM.

Failure to reach rated RPM has many possible causes, from a fouled bottom to the wrong propeller or an engine problem. Have a specialist diagnose it instead of accepting "she just needs a clean".

Run each generator with a real electrical load, not at idle. Switch on air-conditioning, refrigeration, water heating and pumps together, and watch voltage and frequency.

How do you test rig, spars and sails under load?

Not every large wooden hull sails regularly, and a rig can look better than it works. Find out how often she has been sailed, and whether the rig actually works. If the listing presents the boat as a sailing yacht, ask to sail her.

1. Set and trim each sail in suitable wind, with someone experienced in that rig.
2. Reef, furl, tack and lower sails; watch winches, sheets and halyards.
3. Look at mast movement at deck and step, and listen for creaking.
4. Note weather helm and whether she can be steered without excess force.
5. Inspect chainplates and fittings again afterwards for fresh movement or water.

A sea trial does not replace a rig inspection aloft, so book that separately if the boat will sail.

What about electrics, navigation and safety equipment?

Use equipment normally instead of just switching it on. Check chargers, shore-power changeover and batteries under load, and watch for voltage drop, flickering displays and tripped breakers.

Compare navigation instruments against each other: GPS, chartplotter, depth, radar, AIS, VHF, autopilot. Test navigation and anchor lights.

For safety gear, check presence, condition, service dates and access: life rafts, lifejackets, extinguishers, fire and high-water alarms, bilge pumps, EPIRB and flares. Some items are checked by service record rather than set off. On a commercial boat, remember that sailing approval and certificates depend on the vessel's type, size and activity, so ask what the port authority expects.

Which structural signs show up under way on a wooden hull?

Here a timber boat differs most from a moulded one. Timber moves, and loads reveal things that a tied-up boat does not. Have the surveyor record bilge levels and pump activity before leaving, during the trial, after hard manoeuvres and back at the dock.

• Working seams. Fresh lines along plank seams, caulking being squeezed out, or water where it was dry at rest.
• Leaks. Drips at garboards, stem, sternpost, shaft log, chainplates or through-hulls, or pumps cycling more often.
• Flexing. Creaks and groans, doors and hatches that change fit, and movement around the mast step.
• Engine-related signs. Vibration that grows with RPM, or a stern gland leaking more as speed rises.

A hull that recently spent a long time ashore may take on water until the planks take up, so do not read every drop as failure. But increasing leakage under load is something a specialist needs to explain. Our guide to buying a used wooden yacht shows how these findings fit with records and refit history.

How do you write pass and fail into the contract?

BoatCrowd describes a common structure: within a fixed period the buyer may accept, accept subject to repairs, or reject, and silence may count as acceptance. BVI Yacht Sales notes that survey and sea-trial conditions may be separate rights with separate deadlines. Your lawyer should check how yours work.

Ask for wording on each of these:

1. Date window, duration and sea area of the trial.
2. Conditions under which the trial must be postponed.
3. Equipment that must be demonstrated, as an attached list.
4. Measurable results, such as reaching rated RPM and holding temperature.
5. The deadline for written notice, and what silence means.
6. Refund terms if you reject, and who pays for a repeat trial.

Attach the trial notes, engine data and defect list to any acceptance you sign. And keep the haul-out as its own condition, since the bottom of the boat can't be judged from the deck.

What do buyers ask about sea trials?

Common questions from people about to book their first trial on a timber hull.

How long should a wooden yacht sea trial last?

Long enough for temperatures and pressures to stabilise and for the hull to work in real conditions. One published guide suggests around 30 to 60 minutes at cruise speed where conditions allow, within a longer trial. Write the duration and sea area into the contract.

Who pays for fuel and crew on a sea trial?

The contract should say. A common pattern is that the seller makes the boat and crew available and the buyer pays for their own surveyor, specialists and inspection haul-out, but practice varies. Agree in writing who pays if the boat fails to start or a second trial is needed.

Is a little water in the bilge normal on a wooden boat?

A wooden hull may take some water, particularly after launching or a long spell ashore. What should concern you is leakage that increases under load, or pumps that cycle faster during the trial. Record bilge levels before, during and after, and let the surveyor interpret them.

Can the sea trial replace the survey?

No. A trial tests the boat's systems and behaviour under way, and a survey opens up the structure and records its condition. Keep them as separate conditions with their own deadlines, so that passing one does not waive the other.

What happens if the weather stops the trial?

Agree this in advance. The contract should say how the deadline moves if weather prevents a meaningful test, and that a trial in flat calm or on a short run does not count as a full test. Do not accept the boat just because the date passed.

Which sources support this page?

Checked by the desk in October and November 2026. A source being listed does not mean the source agrees with us or has reviewed this page, and limited-verification items deserve a second look before you rely on them.

• Passion Asset Advisory, buying a yacht
• MYBA E-MOA 2021 form
• Global Yacht Guide, pre-purchase survey guide (third-party guide)
• BoatCrowd, survey and sea trial guide
• BVI Yacht Sales, boat sea trial

Written and checked by the Wooden Yacht For Sale Editorial Desk.

How do I send a buyer brief for a boat I want to trial?

Send us the listing, the location and your preferred dates, and see the full wooden yacht buying sequence. Reach the desk on WhatsApp 6281139414563 or at bd@juaraholding.com.