
This hub answers over 100 questions on marine survey in Indonesia — what a surveyor does, how to book one, what each survey type covers, the technical detail behind hull, machinery, cargo and quantity work, and how reports are used by insurers, banks and claims. Questions are grouped and do not repeat the FAQ on individual service pages.
If your question is not here, send it to the desk. We add questions that clients actually ask rather than questions that are convenient to answer.
What a marine surveyor does
What does a marine surveyor do?
A marine surveyor inspects vessels, cargo and marine equipment and reports on condition, damage, quantity or compliance for the party carrying the risk — a buyer, owner, underwriter, bank, charterer or cargo interest.
Is a marine surveyor the same as a ship inspector?
Not quite. “Inspector” usually implies acting for an authority or a class society against a fixed standard. A surveyor is appointed privately and reports condition and fact to the instructing party.
What qualifications should a marine surveyor have?
Relevant sea-going or shipyard engineering background, demonstrable experience on the vessel type in question, and professional indemnity cover. Ask what the surveyor has actually surveyed rather than only what letters they hold.
Do surveyors specialise?
Yes, and it matters. Yacht and small-craft work, commercial hull and machinery, cargo and quantity, and statutory and tonnage work are four different skill sets. We tell you which specialisation is attending.
Does a surveyor carry professional indemnity insurance?
A working survey practice should, and ours does. The limit and terms are stated in the engagement conditions.
Can a surveyor also repair the vessel?
Not on the same vessel in the same transaction without disclosing it. A surveyor who profits from the repairs they recommend has an obvious conflict. Our survey work and any group yard work are kept in separate hands.
Who appoints the surveyor?
Whoever carries the risk and needs the evidence. In a purchase that is the buyer; in a claim it is the party asserting or defending it; in financing it is the lender.
Can one surveyor act for both buyer and seller?
Only under a written joint appointment agreed by both. Otherwise each side appoints separately.
How do I check a surveyor is genuinely independent?
Ask three questions: who pays you, do you receive any commission from anyone else in this transaction, and does your fee change if the deal completes. Any hesitation is your answer.
Will the surveyor tell me whether to buy?
The report states condition, defects and value. Most buyers want a direct view as well, and we will give one — clearly separated from the factual findings.
Choosing and booking a survey
How do I choose a marine surveyor in Indonesia?
Match the specialisation to the vessel, ask for a redacted sample report, confirm the scope in writing, and confirm independence. Compare quotations on scope rather than on price alone.
How far in advance should I book?
One to two weeks for a planned survey at a main port; two to four weeks if a slipway is involved or attendance is in a remote location. Casualty attendance is same or next day.
What information do you need to quote?
Vessel type, length, build year, current port, the purpose of the survey and your date range. A listing link or general arrangement drawing helps.
Can you survey a vessel I have only seen online?
Yes, and that is exactly when a survey earns its fee. You get a verbal preliminary the same day so you know whether the vessel is worth travelling for.
Do I need to attend the survey myself?
No. Many clients never see the vessel until after the report. If you do attend, stay out of the way during the inspection and save your questions for the debrief.
Can the seller be present?
Usually yes, and often useful for access and for operating machinery. The report is issued to you alone regardless.
What if the seller refuses a survey?
Walk away, or treat the refusal itself as the finding. In a functioning market a seller with a sound vessel has no reason to refuse an independent inspection.
Can you survey at short notice?
Often yes at ports with a resident desk. Tell us the deadline and we will say plainly whether it is achievable rather than promising and failing.
Do you work weekends and public holidays?
For casualty and cargo attendance, yes. Planned surveys are normally scheduled on working days because yards and terminals are.
Do you sign non-disclosure agreements?
Yes. Reports are confidential to the instructing party by default, and we are happy to formalise that.
Pre-purchase and buying
At what point in a purchase should the survey happen?
After a price is provisionally agreed and before the deposit becomes non-refundable, with a survey clause written into the offer.
What is a survey clause?
A term in the offer making completion or the deposit conditional on a satisfactory independent survey. It is standard practice and rarely refused.
Can I renegotiate on survey findings?
That is the normal outcome when defects are found. A priced repair scope built from the defect list is far more persuasive than a general complaint about condition.
Should I survey more than one candidate vessel?
If they are at the same port, surveying two on one mobilisation costs much less than two trips and makes the comparison genuinely like for like.
Do you inspect the vessel’s paperwork as well?
Yes — registration, tonnage, class status where applicable, and certificate currency. Title and encumbrance searches are a legal matter, not a survey one, and we say so.
What is the most common serious finding on a used vessel here?
On steel, wastage hidden behind doubler plates. On GRP, wet core in decks and bulkhead tabbing failure. On timber, fastening sickness. On any of them, deferred safety and firefighting equipment.
Does a newer vessel need less survey?
It needs a different survey, not a lighter one. Build defects, warranty issues and installation faults are what you are looking for on a young vessel.
Can you survey a vessel still under construction?
Yes, at agreed stages. Stage inspection is far more valuable than a single delivery survey.
What if I am buying from an overseas seller?
That is common. We invoice in USD, report in English and correspond directly with you regardless of where you are.
Do you help with the handover?
We can attend at delivery to verify that the agreed rectifications were carried out. That is a short re-attendance rather than a second full survey.
Scope, limitations and method
Is a marine survey destructive?
Non-destructive by default. Paint may be ground back for thickness readings, and on timber hulls pick testing and sample fastening withdrawal are necessary and agreed in writing beforehand.
Do you open up engines?
Not as standard. Machinery is assessed non-invasively — running observation, temperatures, pressures, oil condition and analysis, borescope where access allows. Opening up is a separate agreed scope.
Do you dive the vessel?
We arrange a commercial diver where an in-water inspection is required and a haul-out is not possible. It is a partial substitute, not an equivalent.
What is not covered by a survey?
Anything concealed, anything requiring dismantling not agreed in scope, latent defects, and anything outside the stated purpose. The limitations section lists it explicitly.
What is a moisture meter reading actually telling me?
A relative comparison on a stated scale between areas of the same laminate, not an absolute water content. Readings taken immediately after haul-out are close to meaningless without context.
Why does the hull need to dry before moisture readings?
A hull straight out of the water carries surface water that swamps the reading. A minimum drying period — usually stated in the report — is needed for readings to mean anything.
How do you assess a GRP hull for delamination?
Percussion sounding across the laminate listening for change in tone, supported by moisture mapping and, where agreed, small core samples in specified locations.
What is a hammer or percussion test?
Tapping the structure with a phenolic or light hammer and listening. A change in tone indicates voiding, delamination, wet core or, on timber, softness beneath the surface.
Do you test the electrical installation?
Function testing under load as standard; insulation resistance testing and thermal imaging where specified in scope.
Do you check the rig on a sailing yacht?
Deck-level rig inspection is standard. Mast climbing or unstepping is arranged separately when the rig age or condition warrants it.
Do you test tanks?
Visual and sounding as standard. Pressure or hydrostatic tank testing is a yard operation carried out under a separate scope, normally at docking.
What instruments does the surveyor carry?
Ultrasonic thickness gauge, moisture meter, borescope, sounding tape and bob, calibrated hydrometer, thermometer, phenolic hammer, spike, torch, gas detector where relevant, and photographic equipment.
Are your instruments calibrated?
Yes, and the ultrasonic gauge is checked on a reference block of known thickness at the working temperature at the start of each session.
Technical: hull and machinery
What causes pitting corrosion on a steel hull?
Localised breakdown of the protective film, often under damaged coating, in stagnant bilges or where dissimilar metals meet. Pitting is more dangerous than general wastage because it penetrates faster in a small area.
What is galvanic corrosion?
Corrosion driven by two dissimilar metals in electrical contact in seawater. The less noble metal corrodes preferentially — which is exactly what a sacrificial anode is for.
How often should anodes be replaced?
When roughly half consumed, which in warm Indonesian waters typically means annually or at each docking. Anodes that never waste are usually not electrically bonded and are doing nothing.
What is stray current corrosion?
Corrosion caused by leakage of DC current from the vessel’s own electrical system or from a neighbouring vessel on the same shore supply. It can destroy underwater metal in weeks.
What is a doubler plate and why is it a finding?
A plate welded over wasted steel instead of renewing it. It hides the underlying condition, traps moisture between the plates and is generally not accepted by class as a permanent repair.
How is propeller shaft alignment checked?
By vibration signature through the RPM range, cutless bearing clearance, stern gland behaviour and temperature, and where the vessel is out of the water, by measuring the coupling faces.
What does black exhaust smoke indicate?
Incomplete combustion — commonly overload, restricted air intake, worn injectors or turbocharger deterioration. Blue smoke suggests oil consumption; white suggests unburnt fuel or water.
What is crankcase blow-by?
Combustion gas escaping past the piston rings into the crankcase. Excessive blow-by measured at the breather is a direct indicator of ring and liner wear.
What does oil analysis actually detect?
Wear metals identifying which component is degrading, contamination by water, fuel, coolant or dirt, and degradation of the oil itself. It is the least costly diagnostic on a vessel.
How long do marine diesel engines last?
Service life depends on load profile and maintenance far more than on hours. A lightly loaded commercial engine can run for tens of thousands of hours; a high-output pleasure engine run hard in the tropics may need major work in a few thousand.
What is osmosis in a GRP hull?
Water migrating through the gelcoat and reacting with unreacted resin components, producing acidic fluid-filled blisters. Widespread deep blistering is a structural and cost issue, not a cosmetic one.
What is a wet deck core?
Water trapped in the balsa or foam core of a sandwich deck, usually entering through unsealed fastenings. It softens the deck, adds weight and eventually destroys the bond between skins.
What is crevice corrosion on stainless steel?
Localised attack in oxygen-starved gaps — under fittings, inside swage terminals, beneath washers. It is the reason rigging can fail while looking perfect from outside.
How do you assess a rudder?
Bearing clearance, stock condition where visible, weld and skin condition, water inside a hollow rudder (drilled and drained by agreement), and stop condition at full lock.
What is cavitation damage?
Erosion of propeller blades or rudder surfaces caused by imploding vapour bubbles. It indicates a hydrodynamic problem — blade profile, clearance or fouling — not simply wear.
Technical: cargo, draft and quantity
Why is a draft survey needed if there is a shore weighbridge?
Because the parties often do not both trust the same scale, and at anchorage transhipment there is frequently no shore weigher at all. Draft survey is the accepted independent method.
What is the constant in a draft survey?
The difference between the vessel’s actual lightship weight and her recorded lightship, absorbing accumulated mud, spares, unrecorded stores and hull additions. It is derived, not assumed.
Why does dock water density matter?
Displacement tables assume a standard density. River and estuary water is lighter, so the same draught corresponds to a different weight. An uncorrected density error is a systematic error on the whole parcel.
What is hog and sag?
Longitudinal hull deflection — hogging when the ends are lower than midships, sagging the reverse. Both distort the mean draught, which is why the mean-of-means calculation weights the midship reading.
What is the wedge formula used for?
Calculating the volume of liquid trapped in a tank when trim or list means the liquid does not reach the sounding point. Ignoring the wedge is how bunker quantity disappears.
What is a TML and why does it matter?
Transportable moisture limit — the maximum moisture content at which a bulk cargo such as nickel ore may safely be carried. Above it, the cargo can liquefy and capsize the vessel.
What is a can test?
A rapid shipboard indication of whether an ore cargo may be above its flow moisture point: a sample in a cylinder is struck repeatedly and observed for free moisture or flow.
What is cargo outturn?
The quantity and condition of cargo actually delivered at discharge, compared against the bill of lading figure and the loading condition.
What is an ullage and how does it differ from a sounding?
A sounding measures liquid depth from the tank bottom; an ullage measures the empty space from a reference point down to the liquid surface. Both need trim and list correction.
Why are bunker samples split three ways?
So that the vessel, the supplier and the surveyor each retain a sealed sample from the same source. Without retained samples, a later quality dispute has no evidence.
What is a bunker delivery note discrepancy?
A difference between the quantity stated by the supplier and the quantity measured on board. The surveyor records both figures and the difference rather than reconciling them away.
What causes water damage to cargo in a hold?
Hatch cover leakage, condensation from inadequate ventilation, ballast or bilge ingress, and pre-shipment wetting. Each leaves a different staining pattern and the survey distinguishes them.
What is a hold cleanliness inspection?
An inspection before loading to confirm the holds are clean, dry, odour-free and suitable for the nominated cargo, to the standard the charterparty requires.
What is a tally survey?
An independent count of units loaded or discharged — bags, bundles, pieces, containers — recorded against the manifest to establish shortage or overage.
What is a lashing and securing inspection?
Verification that cargo securing matches the approved cargo securing manual or the sea-fastening design, including materials, ratings, geometry and welding where relevant.
Insurance, claims and finance
What does a hull and machinery policy cover?
Physical loss or damage to the vessel herself, subject to the policy terms. Third-party liability generally sits with protection and indemnity cover instead.
What is a warranty survey?
A survey required by underwriters before a specific operation — a tow, a heavy lift, a load-out — confirming the arrangement is acceptable, with any conditions stated.
Why does an underwriter want a condition survey?
To price risk and to identify defects likely to cause a claim, particularly on older vessels or after a previous loss.
What happens if survey recommendations are not carried out?
Underwriters commonly make cover conditional on them. Unclosed recommendations can reduce or defeat a claim connected to that defect.
What is a general average?
A maritime principle where a sacrifice or expenditure made for the common safety of vessel and cargo is shared proportionally between all interests. Surveyors are involved in establishing the facts and quantum.
What is a subrogation survey?
A survey conducted for an insurer who has paid a claim and is pursuing recovery from a third party, focusing on causation and quantum.
Who pays for a joint survey?
Each party pays its own surveyor. Where a genuinely joint appointment is made, the parties agree the cost split in advance.
How soon after damage should a survey happen?
Immediately. Evidence perishes, vessels move and repairs begin. A survey within twenty-four hours is worth several after a week.
What is a repair specification?
A written description of the work required to rectify damage, written independently so that competing yards price the same scope.
What valuation does a bank need?
Usually market value and forced-sale value, addressed to the bank, with the method shown and dated within the lender’s currency window — commonly three to six months.
Can a valuation be done without a physical inspection?
A desktop opinion can be produced but should be labelled as such. It assumes condition rather than observing it, and most lenders will not accept it for drawdown.
How often should a vessel be re-surveyed for insurance?
Typically every two to five years depending on age, type and the underwriter’s terms, and after any significant damage or repair.
Regulation, class and flag
What is a classification society?
An organisation that sets and verifies technical standards for ship construction and maintenance, issuing class certificates and often acting on behalf of a flag state for statutory certification.
Does every vessel need to be in class?
No. Class is generally required for larger commercial vessels, for most financing and for international trade, but many smaller and domestic vessels operate outside class under flag rules.
What happens when class is suspended?
The certificate is not valid, and hull cover normally follows class. Reinstatement follows the society’s own procedure, usually requiring more survey than the missed item.
What is a recognised organisation?
A classification society authorised by a flag state to carry out statutory surveys and issue certificates on its behalf.
What is port state control?
Inspection of foreign vessels in national ports to verify compliance with international conventions. Deficiencies can lead to detention until rectified.
What is the difference between class and statutory survey?
Class surveys verify compliance with the society’s technical rules. Statutory surveys verify compliance with international conventions and flag law. They are often carried out together.
What is IIMS?
The International Institute of Marine Surveying, a professional body for marine surveyors. Where an individual surveyor holds a membership grade, that is stated in the report — we do not claim institutional status the practice does not hold.
What certificates should a commercial vessel hold?
It depends on size, flag and trading area, but typically registration, tonnage, load line, safety equipment and construction certificates, pollution prevention certificates and, for international trade, ISM and ISPS documentation.
What is a load line and why does it matter?
The mark showing the maximum permitted loading draught for the vessel’s zone and season. Loading beyond it is both illegal and a stability and strength risk.
What is the Indonesian flag registration process for a foreign-built vessel?
It involves deletion from the previous register, import formalities, tonnage measurement, technical inspection and registration with the maritime authority. We advise and prepare; the certificates are issued by the authority.
Working in Indonesia
Do I need an Indonesian company to commission a survey?
No. We are instructed by individuals and companies anywhere, invoice in USD and report in English.
Can I get an English-speaking surveyor?
Yes. English reporting and English-speaking attendance are standard, and a large share of our work is for foreign buyers, underwriters and club correspondents.
How does weather affect survey scheduling?
The northwest monsoon, roughly December to March, delays anchorage attendance and boat transfer across much of the archipelago. We plan date ranges rather than single dates in that season.
Can you survey vessels at remote anchorages?
Yes, by boat transfer and, where required, with overnight attendance aboard. Travel is quoted before you commit.
What is the biggest practical obstacle to a survey here?
Access. Getting the vessel opened up, the yard to admit the surveyor, the engine left cold and the crew available on the agreed day is where most delay comes from.
Do you handle port passes and terminal access?
Yes at ports with a resident desk, provided we have the vessel, berth and ETA with enough notice.
Do you work with P&I club correspondents?
Yes, routinely — as the technical surveyor alongside the correspondent’s liability handling.
Can you attend on very short notice for a casualty?
Same or next day at resident-desk ports. Elsewhere we give a realistic ETA rather than an optimistic one.
Do you provide reports for court or arbitration?
We provide factual technical reports. Formal expert appointment is a separate engagement agreed with the instructing party and their lawyers.
How do I send you vessel information securely?
By email or WhatsApp to the desk. Reports and client information are treated as confidential to the instructing party.
Pertanyaan dalam Bahasa Indonesia
Apa itu surveyor kapal independen?
Surveyor yang ditunjuk dan dibayar oleh pihak yang menanggung risiko, tidak menerima komisi dari penjual, broker, atau galangan, dan menuliskan temuan apa adanya.
Apa bedanya survey kondisi dan survey pra-beli?
Survey pra-beli ditujukan untuk keputusan membeli. Survey kondisi ditujukan untuk pemilik, bank, atau asuransi dan menekankan gradasi kondisi serta nilai.
Apa itu pengukuran tonase kapal?
Perhitungan volume ruangan tertutup kapal yang menghasilkan tonase kotor dan tonase bersih, yang menentukan kategori pendaftaran, pengawakan, dan kewajiban survey.
Siapa yang berwenang menerbitkan sertifikat tonase di Indonesia?
Sertifikat diterbitkan di bawah kewenangan Direktorat Jenderal Perhubungan Laut. Surveyor independen mengukur, menyiapkan perhitungan, dan mendampingi proses.
Apa itu survey draft dan kapan diperlukan?
Metode menghitung jumlah muatan curah dari perubahan displasemen kapal, dipakai saat tidak ada timbangan darat yang disepakati atau saat muat di area labuh jangkar.
Kenapa kapal kayu harus naik dok saat disurvey?
Karena kondisi paku, celah dempul, papan garboard, dan serangan cacing laut tidak dapat dinilai saat kapal terapung.
Apakah biaya survey bisa dibayar setelah laporan terbit?
Untuk penugasan pertama kami meminta pembayaran di muka. Klien tetap, perusahaan asuransi, dan korespondensi P&I dapat bekerja dengan sistem rekening.
Apakah laporan survey bisa dipakai untuk klaim asuransi?
Bisa, dan itu salah satu tujuan utamanya. Sebutkan sejak awal bahwa laporan ditujukan untuk asuransi agar formatnya sesuai.
Berapa lama laporan survey berlaku?
Tidak ada masa berlaku resmi. Asuransi umumnya menerima laporan dalam dua sampai lima tahun terakhir; bank umumnya meminta penilaian dalam tiga sampai enam bulan terakhir.
Apakah bisa survey kapal di luar pelabuhan besar?
Bisa, dengan mobilisasi. Biaya perjalanan dikutip lebih dahulu dan ditagihkan sesuai biaya nyata.
Request a surveyor
Yacht & leisure
Pre-purchase, condition, valuation, insurance and phinisi or liveaboard surveys.
Commercial & cargo
Draft, bunker, cargo, on/off-hire, P&I, hull & machinery and statutory attendance.