Yacht Survey Checklist: 200-Point Pre-Purchase Inspection Guide

Quick answer: A pre-purchase yacht survey costs $15–$25 per foot of LOA and typically takes 1–3 days including sea trial. Always commission an independent IIMS- or NAMS-credentialed surveyor — never use the seller’s. Key areas: hull and structure (with haul-out), main engines, generators, electrical systems, safety equipment, and documentation. On brokerage sales in the 40–65 ft band, survey credits of 3–8% of offer price are common when machinery or osmosis findings surface — walk-away rights under a standard MYBA MOA usually survive only if safety defects appear, not cosmetic wear.

See also: General yacht buying guide · Used yacht buying guide · Superyacht buying guide · New vs used yacht comparison · How to buy a superyacht

Why the Pre-Purchase Survey Is Non-Negotiable

The pre-purchase survey is the only thing standing between you and a six-figure mistake. A yacht is not a car — the mechanical, electrical, structural, and safety systems are invisible to untrained eyes, and sellers have no legal obligation to disclose problems they claim not to know about.

What the survey protects you from:

• Undisclosed osmotic blistering in a fibreglass hull (repair cost: $15,000–$80,000)
• Deferred engine maintenance that turns into a $40,000 engine rebuild 6 months post-purchase
• Outdated or expired safety equipment that makes the vessel non-compliant
• Documentation gaps (no proof of VAT paid, disputed ownership, outstanding liens)
• Structural fatigue in keel attachment, mast steps, or deck-to-hull joints

A survey on a 40-footer costs $600–$1,500. Skipping it to save that money and later discovering osmotic blistering costs $15,000–$80,000 to treat. A missed engine problem becomes a $60,000–$180,000 replacement six months after closing. The survey fee is the highest-ROI expense in the entire purchase — bar none.

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How to Commission a Survey

Step 1: Choose an Accredited Independent Surveyor

Look for accreditation from:

• IIMS (International Institute of Marine Surveying) — globally recognised
• NAMS (National Association of Marine Surveyors) — US-focused
• RINA (Royal Institution of Naval Architects) — higher-end vessels and superyachts
• SAMS (Society of Accredited Marine Surveyors) — US and Caribbean

Non-negotiable rule: Your surveyor must have no prior relationship with the vessel, the seller, the selling broker, or the marina where the vessel is berthed. Request a written conflict-of-interest declaration. If a listing broker offers to “recommend a great surveyor who knows this boat,” decline. That surveyor knows the boat because they’ve been paid by the seller before — and they’ll find fewer problems than a stranger would.

Step 2: Define the Survey Scope

A complete pre-purchase survey for a used motor or sailing yacht includes:

1. Above-waterline structural survey — deck hardware, hull topsides, superstructure
2. Below-waterline inspection (haul-out) — hull, keel, rudder, propellers, shafts, sea cocks
3. Machinery survey — main engines, generators, hydraulic systems
4. Electrical systems survey — DC, AC, shore power, inverter, battery banks
5. Navigation and communication electronics — chart plotters, radar, AIS, VHF
6. Safety equipment review — life rafts, EPIRBs, flares, fire suppression
7. Rig and sails inspection (sailing yachts) — mast, boom, rigging, sails
8. Sea trial — vessel performance, handling, and systems under operational conditions
9. Documentation review — registry, VAT, insurance, classification, radio licence

For vessels over 24m, you may need multiple specialist surveyors: a hull and structural surveyor, a machinery surveyor, and an electrical systems specialist. The buyer’s broker should coordinate this.

Step 3: Book Haul-Out

Haul-out is where the hull is lifted out of the water at a boatyard for inspection. For any vessel over 10m, this is essential. Budget for:

• Boatyard lift fee: $300–$5,000 depending on vessel size
• Storage during survey: $50–$500/day
• Wash-off and pressure clean: $200–$1,000
• Total haul-out related costs: $1,000–$8,000

Allow 3–5 working days for a full haul-out inspection including pressure wash, moisture metering, shaft and rudder inspection, and underwater video.

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Section 1: Hull and Structure Checklist

Exterior Hull (Topsides)

• Inspect gelcoat for crazing, star cracks, and impact damage
• Check waterline for staining, chemical damage, or paint delamination
• Examine hull-to-deck joint seal (common failure point on GRP vessels)
• Inspect transom for delamination or structural damage
• Check swim platform attachment and any hull-mounted fittings
• Look for evidence of previous collision repair (bondo filler, colour mismatch)
• Photograph all blemishes and damage for condition record

Hull Below Waterline (Haul-Out Required)

• Osmosis moisture test — use a Sovereign or Tramex moisture meter on 20+ grid points across the hull
  • Below 15% moisture reading: acceptable
  • 15–20%: borderline, negotiate price allowance
  • Above 20%: significant osmosis, budget for treatment
• Inspect antifouling paint — ablative vs. hard paint, application quality
• Check hull fairness — run a batten along hull to detect bumps or hollows
• Inspect keel attachment bolts (external keel yachts) — no weeping, corrosion, or movement
• Check keel/hull joint for crack evidence
• Inspect fin keel leading edge for impact damage (grounding history)

Running Gear

• Remove propeller(s) — inspect blades for nicks, bends, cavitation erosion
• Check propeller shaft for straightness (rotate by hand with shaft log submerged)
• Inspect shaft seal/stuffing box — acceptable drip rate (4–8 drops/minute under way)
• Check cutlass bearings for play (more than 1mm lateral movement indicates replacement)
• Inspect rudder for play — grab by hand, rock laterally and vertically
• Check rudder bearing condition and rudder pintles/gudgeons
• Inspect bow thruster tunnel and propeller (if fitted)

Sea Cocks and Through-Hulls

• Locate all sea cocks — every one should be labelled
• Test operation — open and close each sea cock smoothly
• Inspect backing plates for corrosion or fatigue
• Check anti-siphon loops on exhaust and cockpit drains
• Inspect bilge pump pickups and discharge fittings

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Section 2: Deck and Superstructure Checklist

Deck Hardware

• Test cleats, bow fairleads, and stern fairleads for secure attachment
• Inspect windlass — operation under load (drop and recover anchor twice)
• Check anchor chain for rust, bent links, and calibration markings
• Test anchor windlass remote control (if fitted)
• Inspect all stanchions for looseness (a common MOB hazard)
• Check lifeline wire tensioning and pelican hook condition
• Inspect swim ladder and its locking mechanism
• Test all deck hatches for waterproof seal (spray test)

Superstructure and Windows

• Inspect window frames for sealant failure, corrosion, or crazing
• Check all portlights for watertight seal
• Inspect flybridge (if fitted) for delamination or cracking around aerial bases
• Test helm station ergonomics and visibility
• Check bimini and hardtop for cracks, UV degradation, and hinge integrity

Cockpit and Aft Deck

• Test cockpit drains — they should clear in under 30 seconds from full
• Inspect cockpit table, seating, and storage
• Check boarding ladder and stern platform for secure attachment
• Inspect tender davits or crane (if fitted) — rated for load, smooth operation
• Test swim platform transom door and its locking mechanism

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Section 3: Interior Structure and Systems

Hull Interior (Below Sole)

• Remove all inspection hatches and examine bilge for standing water, oil, and debris
• Inspect stringers and bulkhead tabbing for delamination or cracking
• Check keel bolt access plates — no weeping or staining around bolt holes
• Test bilge pump operation — automatic float switch and manual override
• Inspect engine beds for cracking or movement
• Look for signs of previous flooding, fire, or major repair

Accommodation

• Test all doors and hatches — smooth operation indicates hull is not racked
• Check headliner panels for water staining (indicates deck leak or condensation)
• Inspect joinery quality and condition — look for loose fixings, swollen wood
• Check mattresses and upholstery for mould (indicates poor ventilation history)
• Test all cabin fans, lighting, and electrical outlets
• Inspect galley appliances — cooker, oven, refrigerator, watermaker (if fitted)
• Check freshwater system — run all taps, test water pressure
• Inspect hot water system — calorifier and electric immersion heater
• Test holding tank system — visual inspection, no leaks or odours
• Check head operation — pump, macerator, and plumbing condition

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Section 4: Engine and Mechanical Systems

Main Engine(s)

• Record engine serial numbers and confirm against documentation
• Obtain and review service records — check against manufacturer’s hour-based schedule
• Check oil level and condition — black, milky, or metallic particles indicate problems
• Check raw water impeller service date (replace every 200–300 hours or 2 years)
• Inspect raw water strainer for debris and corrosion
• Check coolant level and colour — brown discolouration indicates rust in heat exchanger
• Inspect all belts and hoses for cracking or chafing
• Check engine mounts for deterioration or movement
• Inspect exhaust manifold and waterlock for corrosion
• Test zincs on shaft, keel, and hull — less than 50% remaining needs replacement
• Request compression test results (or arrange on site for diesel engines)
• Record engine hours and cross-check with log book

Generator(s)

• Record generator model, serial number, and service records
• Test start and run under load (switch on air conditioning, watermaker, and galley)
• Check exhaust water-jacketed cooling and anti-siphon loop
• Inspect mounting and vibration isolation mounts
• Check oil and coolant levels

Fuel System

• Inspect fuel tanks — access through inspection plates if possible
• Check for fuel-water contamination (draw sample from tank sump)
• Inspect fuel fills, vents, and anti-syphon devices
• Check fuel filters (primary and secondary) — debris or water contamination
• Inspect day tank or header tank if applicable
• Check fuel hose condition and clamp integrity throughout

Watermaker (Reverse Osmosis)

• Test operation — confirm flow rate matches rated output
• Check filter service date and membrane condition
• Inspect high-pressure pump for leaks
• Review preservation/pickling log (membrane damage from dry storage is expensive)

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Section 5: Electrical Systems

Marine electrical faults cause the majority of onboard fires. This section warrants particular attention.

DC (12V/24V) System

• Test battery bank voltage under load — below 12.4V (12V system) suggests weak batteries
• Inspect battery terminals and cable connections — no corrosion, correctly sized cables
• Check battery compartment for ventilation (hydrogen gas discharge)
• Test battery isolator switches and label accuracy
• Inspect bilge blower before engine start (mandatory in many codes)
• Test all navigation lights — masthead, port, starboard, stern, anchor
• Check windlass circuit breaker and cable sizing (under-spec wiring is a fire hazard)

AC (230V/110V Shore Power and Inverter)

• Test shore power connection — check for correct polarity and good earth connection
• Inspect shore power socket for corrosion and weatherproofing
• Check inverter/charger output and charge profile settings
• Test all AC outlets — use a polarity tester
• Inspect AC main panel labelling and breaker condition
• Check RCD (residual current device / GFCI) trip function

Navigation and Communication Electronics

• Test chartplotter — GPS lock, chart update date, routing functions
• Test VHF radio — confirm DSC distress call function with Coast Guard (test only)
• Test SSB or Iridium satellite phone (if fitted)
• Test AIS transponder — confirm MMSI number matches vessel documentation
• Test radar — both range and target identification
• Test depth sounder — compare reading to known depth at berth
• Check autopilot — test both helm mode and navigation mode
• Test wind instruments (sailing yachts) — apparent and true wind, confirm calibration
• Inspect aerial and antenna connections

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Section 6: Safety Equipment Checklist

This is a non-negotiable section. Outdated or missing safety equipment is both a legal and life-safety issue.

Life Rafts

• Confirm make, model, capacity, and service date
• Check hydrostatic release — must be less than 2 years from service date
• Verify canister or valise condition — no corrosion or UV damage
• Confirm bracket attachment and painter line connection
• Check for SOLAS or ISO certification appropriate to vessel’s cruising range

EPIRBs (Emergency Position Indicating Radio Beacon)

• Confirm registration — registered to vessel with current flag state and national authority
• Check battery expiry — must be within date (typically 5-year battery)
• Test self-test function (does not trigger distress signal)
• Confirm hydrostatic release bracket is within service date (2-year check)
• Verify 406MHz coding — confirm with EPIRB registration database

Flares

• Check expiry dates on all flares — legal expiry is typically 3 years from manufacture
• Count and record: parachute flares, handheld flares, orange smoke
• Minimum for offshore use (varies by flag and cruising range): 4 parachute + 4 handheld + 2 smoke
• Inspect storage container for moisture

Fire Suppression

• Check engine room automatic fire suppression — cylinder pressure gauge in green
• Inspect CO2 or Halon cylinder — confirm weight against rated fill weight (weigh if possible)
• Check all portable fire extinguishers — pressure gauge in green, service tag current
• Identify fire detection alarm system — test smoke and heat detectors
• Inspect fire blanket location and condition in galley

MOB and Rescue Equipment

• Life rings — horseshoe rings with safety light and heaving line, not mildewed
• Throw bags — condition of line and bag
• Jackstays (ocean passages) — webbing condition and deck attachment
• Harnesses and tethers (sailing yachts) — condition and certifications

First Aid

• Inspect first aid kit — within recommended replacement date
• Check oxygen kit if carried (commercial yachts)
• Confirm defibrillator if fitted — battery and pad expiry

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Section 7: Rig Inspection (Sailing Yachts)

• Step the mast for a rig inspection if not recently done (within 2 years)
• Inspect standing rigging — swageless vs. swaged fittings; check for broken strands at terminals
• Check forestay, backstay, and shroud tension
• Inspect mast track and slides — no bent slides or jammed cars
• Check boom vang, mainsheet, and reefing system
• Inspect furling drum(s) — smooth operation, no binding
• Check halyards and running rigging for chafe
• Inspect chainplates — any rust streaks on deck or interior indicate failure risk
• Check keel-stepped mast compression post — no cracking at base
• Inspect sails — UV degradation, blown seams, batten pocket condition

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Section 8: Documentation Checklist

A vessel’s paperwork is as important as its physical condition. Missing or incorrect documents can delay purchase, trigger tax liabilities, or create title disputes.

Ownership and Registration

• Certificate of Registry — confirms the vessel’s legal name, official number, and registered owner. Must match the seller’s identity exactly.
• Bill of Sale — original or notarised copy for each change of ownership in the vessel’s history
• Builder’s Certificate (if available) — confirms original construction details and first owner
• Mortgage or lien search — confirm no outstanding marine mortgage, finance, or arrest order against the vessel

Tax and Import Status

• VAT-paid documentation or proof of VAT exemption
• If no VAT status: confirm this is reflected in the purchase price and get specialist tax advice
• Import duty documentation (if applicable for cruising in specific territories)

Classification and Safety Certification

• Classification Society Certificate — Lloyd’s, Bureau Veritas, DNV, RINA: confirm valid, not lapsed
• Safety Construction Certificate (commercial vessels / MCA-coded yachts)
• Safety Equipment Certificate (MCA or USCG — commercial operation)
• Safety Radio Certificate (GMDSS or Restricted Radiotelephone Operator Certificate)

Radio and Communications

• Ship’s Radio Licence — confirm station licence is current and registered to vessel (not previous owner)
• MMSI number — registered and active in national MMSI database
• EPIRB registration certificate — confirm matches vessel MMSI and owner

Maintenance and Operating Records

• Engine log or service record — hours, service history, any major repairs
• Classification survey record — dates of last annual and docking surveys
• Safety equipment service records — life raft, EPIRB, fire suppression
• Previous survey reports (if available from seller — treat as informational only)

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Survey Cost Reference Guide

Vessel Size	Condition Survey	Machinery Survey	Sea Trial	Est. Total
Under 30ft (9m)	$450–$900	Included	Included	$600–$1,200
30–50ft (9–15m)	$900–$1,800	Included	Included	$1,000–$2,500
50–80ft (15–24m)	$1,800–$4,500	$1,500–$3,000	Included	$3,500–$8,000
80–120ft (24–36m)	$4,500–$10,000	$3,000–$8,000	$2,000–$5,000	$10,000–$25,000
Over 120ft (36m+)	$8,000–$20,000	$5,000–$15,000	$3,000–$8,000	$18,000–$45,000

Haul-out costs ($500–$8,000 depending on size and boatyard) are in addition to the above.

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What to Do With Survey Findings

Survey reports typically categorise findings as:

Category 1 — Safety Critical: Items that pose an immediate risk to life or vessel safety. Examples: failed through-hull fittings, expired or missing life rafts, failed bilge pumps, cracked keel bolts, gas leak. These must be rectified before completion — the buyer should require written confirmation of repairs or withdraw.

Category 2 — Material Defects: Items that significantly affect the vessel’s value or fitness for purpose. Examples: osmotic blistering, worn engine mounts, corrosion in standing rigging. Negotiate a price reduction proportional to the cost of repair.

Category 3 — Maintenance Items: Normal wear and deferred maintenance items consistent with a vessel of this age and usage. Examples: worn antifouling, minor gelcoat chips, impeller due for replacement. Generally accepted by buyers as part of purchasing a used vessel.

Negotiation guideline: For a well-maintained used yacht, total Category 2 credits of 3–8% of purchase price are common. More than 10% suggests either a mispriced vessel or deferred maintenance that warrants re-evaluating the purchase altogether.

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When to Walk Away

Walking away from a boat you’ve spent weeks pursuing feels painful. But experienced buyers know the relief of dodging a bad purchase far outweighs the disappointment. Walk away if:

• Multiple Category 1 safety defects are identified and the seller refuses to rectify
• Hull moisture readings are above 25% in multiple zones (extensive osmosis)
• Engine hours are significantly higher than documented in the service log (tampering)
• Documentation cannot confirm VAT-paid status and the seller will not reduce price accordingly
• The seller or selling broker refuses to agree to haul-out
• Sea trial reveals a significant issue (engine overheating, vibration, structural flex) and the seller refuses to investigate
• Classification certificates are lapsed or the vessel has been de-classed without explanation

Under a standard MYBA purchase contract, the buyer has the right to renegotiate or withdraw following a survey that reveals material defects. Protecting your right to do so requires that the survey clause is included in the Letter of Intent or Memorandum of Agreement — confirm this with your buyer’s broker before signing.

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Where this fits in the buyer journey

Use this Yacht Survey Checklist 2026: Pre-Purchase Inspection Guide page as one decision layer, not as a standalone verdict. Cross-check it against the ownership cost model, then pressure-test the numbers with the survey checklist. If the vessel profile still makes sense, send the brief through our matched shortlist request so we can route you to the right broker, surveyor, lender, or registration specialist for this exact case.

Survey Cost Calculator

Budget haul and surveyor fees with the yacht survey cost calculator before your used yacht buying timeline.

Buyer scenarios for survey checklist

Weekend coastal owner (survey checklist): Plan 40–60 sea days per year within 200 nm of home port. Prioritise simple systems, familiar yards, and insurance in a jurisdiction your lender accepts.

Liveaboard cruiser (survey checklist): You need passage-making range, comfortable berths, and predictable service networks in the Med or Caribbean. Budget 15–25% of hull value annually for running costs on this use case.

Charter-offset investor (survey checklist): You accept crew, management, and VAT/flag planning in exchange for limited personal weeks. Treat charter income as uncertain — never as guaranteed yield.

Apply this lens to yacht survey checklist before you sign any MOA or build contract.

Frequently Asked Questions

How much does a yacht survey cost? +

Pre-purchase surveys typically cost $15–$25 per foot of length overall (LOA). A 40ft yacht survey runs $600–$1,000; a 60ft yacht costs $900–$1,500. Superyachts over 24m range from $8,000 to $25,000 including specialist machinery surveyors. Always hire your own independent surveyor.

Can I use the seller's surveyor for a pre-purchase survey? +

No. The seller's surveyor has a conflict of interest. Always commission an independent marine surveyor who has no prior relationship with the vessel, seller, or selling broker. An IIMS or NAMS credentialed surveyor is recommended.

Does a yacht need to be hauled out for survey? +

For any vessel over 10m, haul-out is strongly recommended. It allows inspection of the hull below the waterline, keel attachment, propeller shafts, rudder bearings, sea cocks, and antifouling condition. Skipping haul-out on a used yacht purchase is a significant due-diligence gap.

What is an osmosis test in a yacht survey? +

Osmosis is a condition affecting fibreglass (GRP) hulls where water penetrates the laminate and causes blistering. Surveyors use a moisture meter to detect elevated moisture content. Below 15% is acceptable; above 20% indicates significant osmosis requiring hull ablation and epoxy barrier treatment costing $15,000–$80,000 depending on vessel size.

How long does a yacht survey take? +

A thorough pre-purchase survey of a 30–50ft sailing or motor yacht takes 6–10 hours over 1–2 days. Larger vessels (65ft–100ft) typically require 2–3 full days including sea trial. Superyachts over 30m with complex machinery may require 3–5 days.

What happens if the survey finds problems? +

Survey findings fall into three categories: safety defects (must be rectified before purchase), material defects (negotiate price reduction), and maintenance items (normal wear, typically accepted). Most used yacht transactions involve some survey credits — 5–8% price reduction is common. Serious safety findings give the buyer the right to withdraw under standard MYBA contracts.

What documents should I check during a yacht survey? +

Key documents: Certificate of Registry, Classification Society Certificate, Radio Licence (updated to correct call sign), VAT-paid documentation, Insurance certificate, EPIRB registration, Safety equipment service records, engine and maintenance logs, and any snagging list from recent shipyard work.