Boat Inspection vs Marine Survey: Which You Need (UK)
People use "inspection" and "survey" as if they were the same thing. They are not, and the difference decides what you should pay for. Here is what each one is, who does it, and the situations where only one of them will do.
A marine survey
A survey is a professional opinion on a boat's condition and, often, its value, given by a qualified marine surveyor and set out in a written report that insurers, lenders and courts recognise. In the UK surveyors typically belong to a professional body — the Yacht Designers and Surveyors Association, the International Institute of Marine Surveying or the Royal Institution of Naval Architects among them — and carry professional indemnity insurance. The common types:
- Pre-purchase survey. The full examination, out of the water, usually including moisture readings, hammer-sounding of the hull, the rig, the engine installation (not usually the engine's internals) and the systems. It ends with a list of defects and recommendations and, usually, a valuation.
- Insurance (condition) survey. What insurers ask for on older boats, typically every few years: enough to show the boat is insurable, not the depth of a pre-purchase survey.
- Damage survey. After an incident, to establish cause and the cost of repair, often for an insurer.
- Valuation. For finance, probate or a dispute.
What a survey gives you that nothing else does is accountability: a named professional, with insurance, putting their judgement in writing.
An inspection
An inspection is a structured look at the boat by someone who is not necessarily a surveyor: the buyer before a viewing, the owner at lift-out, the charter operator at turnaround, the yard before and after work. It records what was visible on the day — findings, photographs, measurements such as engine hours — and it is only as good as the structure behind it and the honesty of the record.
That is the gap SoundHull was built for. It guides a 46-checkpoint walk around the boat, keeps each photograph fingerprinted so it cannot be swapped later, lets the person on the boat record what they saw in a fixed vocabulary of camera-visible indicators, and produces a signed report that stays yours. It is not a survey, it is not a valuation, and the software never decides anything: the person signs what they saw.
When you need a surveyor
- Buying any boat where the price would hurt to lose, or where the hull is more than a few years old.
- When an insurer or lender asks for one — they will say so.
- After grounding, collision, fire or lightning, before anyone starts repairing.
- Whenever something in your own inspection needs an instrument you do not have: moisture in the deck, a hull that sounds different in one place, keel bolts you cannot see.
When an inspection is the right tool
- Before paying for a survey. Your own pre-purchase inspection tells you whether the boat deserves one and gives the surveyor a list to start from.
- At every handover. Charter check-out and check-in, a boat going into or out of a yard, the day you sell it — a dated, signed record of condition ends most arguments before they start. See the handover checklist.
- Through the boat's life. A lift-out record each winter, a note of every repair with its cost, the paperwork kept in one place: by the time you sell, the boat has a history a buyer can read instead of a story they have to believe.
- After damage, on the day. Before the surveyor can get there, a proper record of what it looked like — see documenting boat damage.
Side by side
| Marine survey | Signed inspection | |
|---|---|---|
| Who | Qualified, insured surveyor | The owner, buyer, yard or operator — whoever is on the boat |
| What | Professional opinion on condition and value | Dated record of what was visible, in a fixed structure |
| Instruments | Moisture meter, hammer, experience of the type | Phone camera, eyes, hands, a torch |
| Recognised by | Insurers, lenders, courts | Useful evidence; not a substitute for a survey where one is required |
| When | Purchase, insurance renewal, damage, valuation | Every handover, lift-out, turnaround, and before a survey |
| Result | Written report with recommendations and valuation | Signed, tamper-evident report with photographs and indicative repair pricing |
The short version: a survey is advice you pay a professional for at the moments that matter; an inspection is the record you keep so that those moments go well. Most boats would be better off with more of the second — which makes the first cheaper and quicker when it comes.
Questions people ask
Is a SoundHull report a survey?
No. It is a signed record of what the person on the boat saw, in a fixed structure, with fingerprinted photographs. It flags visible indicators and gives indicative repair pricing; it is not a professional opinion on condition or value and it does not stand in for a surveyor.
Can I use an inspection report for insurance?
Insurers decide what they accept. Most ask for a survey from a qualified surveyor on older boats. A dated inspection record is useful evidence alongside a claim, especially for the condition before an incident.
How do I find a surveyor in the UK?
The professional bodies — YDSA, IIMS and RINA — publish member directories. Choose one who knows the boat type, ask what the survey includes, and tell them what your own inspection found.
The record that goes with this.
SoundHull guides the inspection, fingerprints every photograph and signs the report. Not a survey — the record you keep so the survey goes well.