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SURVEYOR'S HANDBOOK · RUNNING A SURVEY PRACTICE

Terms of engagement for marine surveyors: what to agree before the survey

UPDATED 12 NOVEMBER 2026 · 3 MIN READ · 6 SOURCES

What a marine surveyor should agree in writing before a survey: who the client is, the purpose, the scope and exclusions, the fee and what it covers, permission to board, and who the report is for, with what IIMS, NAMS and ITIC say.

Most disputes over a survey come back to what was agreed before it started. ITIC, the insurer behind many marine surveyors' professional indemnity cover, is blunt about it: as a professional you must have terms and conditions, and they should set out who is responsible for what.

Who the client is

ITIC's first golden rule is to identify who your client is on day one. It matters most when someone other than the buyer books the survey. The NAMS guidelines for writing reports warn about a broker or owner commissioning a survey that will be handed to a prospective buyer, and advise avoiding that conflict, or even its appearance.

Get the client's name, the purpose of the survey and who else will rely on the report in writing.

What will be inspected, and what won't

ITIC advises defining for the client, at the very outset, the precise extent of the work and specifically what is excluded. The IIMS Code of Conduct asks members to obtain clear terms of reference from the client and confine the report to them.

Name the exclusions that buyers most often assume are included: going aloft, opening up the engine, testing the gas system, removing fixed panels, destructive testing of the laminate. The NAMS guidelines recommend giving the client the scope and the expected limitations before the survey, so they know what the work can and can't tell them. See scope and limitations for how to write them in the report.

The fee and what it covers

The IIMS Small Craft Code of Practice asks surveyors to advise the client of their fee rates, detailing exactly what they include or exclude. It also says the surveyor is entitled to a reasonable charge if the client cancels, and shouldn't give up part of the agreed fee because some parts of the craft weren't accessible.

Put travel, the haul-out, any sea trial and any specialist, such as an engine surveyor or a rigger, on the same page.

Permission and interests

The IIMS Small Craft Code adds two conditions before you accept:

  • Permission to board. Don't agree to survey a craft unless you can be reasonably satisfied that the owner, broker or agent has given permission.
  • Interests declared. Disclose any financial or other interest in the craft before accepting the instruction, and accept no commission or hidden payment.

Who the report is for

ITIC advises stating that the survey isn't for circulation and is issued only for the intended recipient and use. NAMS recommends stating the client and intended use at the start of the report and again in the conclusion, so a third party can't lift the conclusion out of context.

Before, not after

Practical Sailor reported a case where the engagement was verbal and the buyer only received the report's liability limitation clause after the verbal report. The surveyor's defence, that the defect was excluded from the report, failed because no written agreement had been made, and the buyer was awarded $3,300 in arbitration.

ITIC also warns against reliance on oral comments made to the client that could later be denied. Everything you find belongs in the written report.

See professional indemnity insurance for the cover behind the terms, and codes of conduct for what IIMS and NAMS ask of members.

Frequently asked

Do I need written terms for every survey?

ITIC, which insures marine surveyors, says that as a professional you must have terms and conditions, setting out who is responsible for what. A verbal agreement leaves the scope of the survey open to argument later.

What should terms of engagement cover?

Who the client is, what the survey is for, what will and won't be inspected, the fee and what it includes, what happens if the job is cancelled, and that the report is only for the named client and purpose.

Can I add the terms to the report afterwards?

It's weak protection. In a case Practical Sailor reported, the buyer only received the limitation clause with the written report, after the verbal report, and the surveyor's defence failed because no written agreement had been made before the work.

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Terms you'll use

Full glossary
UNDERWATER GEAR

Anode

A block of zinc, aluminium or magnesium fitted to a boat's underwater metal that corrodes in its place, so the propeller, shaft and fittings last.

ENGINE AND FUEL

Anti-siphon valve

A small valve at the top of a petrol tank's fuel outlet that stays closed unless the engine's fuel pump is drawing, so a broken fuel line can't siphon the tank into the bilge.

ELECTRICAL

Battery management system

The electronics that watch a lithium battery's voltage, current and temperature and disconnect it before it's damaged.

ELECTRICAL

Battery switch

The heavy rotary switch that connects or isolates a boat's batteries, often marked 1, 2, Both and Off.

PLUMBING AND TANKS

Bilge pump

An electric or manual pump that removes water from the lowest part of the hull, usually started automatically by a float switch when water rises.

ELECTRICAL

Bonding system

Wires, usually green, that connect a boat's underwater metal fittings to each other, the anodes and the DC negative.

EUROPEAN PAPERWORK

Brodica

The Croatian term for a boat over 2.5 m up to 15 m, registered and inspected by the harbourmaster; craft over 15 m are yachts surveyed by the Croatian Register of Shipping.

HULL AND STRUCTURE

Bulkhead

A wall across or along the inside of a boat, bonded to the hull and deck, that stiffens the structure and often carries rig or engine loads.

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What a pre-purchase boat survey covers, from the haul-out to the sea trial, how to choose a SAMS, NAMS, IIMS or YDSA surveyor, the survey contingency in your offer and how to use the report.

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