Information, not advice: Phinisi Owner is an independent editorial guide — not a shipyard, broker, surveyor, or licensed adviser. Costs and regulations change and every vessel differs; verify figures with yards, independent surveyors, and licensed Indonesian counsel before committing money. If you engage a partner we introduce, that partner may pay us a referral fee at no cost to you.
Knowing what to check before buying a used liveaboard means working through four distinct layers — hull and structure, machinery, paperwork, and business claims — because a failure in any one of them can turn a compelling listing into a money pit or a legal problem. This checklist applies to phinisi, steel, GRP, and any other wooden-vessel liveaboard trading in Indonesian waters, and it is based on patterns observed across the Bulukumba yards, Labuan Bajo brokerage market, and the documented experience of buyers who found out too late.
One principle runs through every point below: demand the primary evidence. Not the seller’s summary. The actual invoice, the yard name, the dated photograph, the original certificate. If the paperwork does not exist, the work probably did not happen, or not in the way described.
Block 1: Hull and Structure (Points 1–9)
The hull is where the largest unknown costs hide, and where a wooden liveaboard diverges most sharply from a comparable fiberglass or steel vessel. Indonesian tropical waters are among the most aggressive environments for teredo naval shipworm on the planet.
1. Teredo Zone Inspection
Teredo worm (Teredo navalis and related species) bores into any unprotected or thinly-coated tropical hardwood. It is most aggressive at and below the waterline, particularly at garboards, keel, and any plank that has lost antifouling coverage. Do not accept a coat of fresh paint as evidence of sound planking. Probe suspect areas with a spike or awl — soft resistance where you expect ironwood means either rot or worm damage. This requires haul-out; do not buy without one.
2. Fastener Condition and Nail Sickness
The boat described in Boat International’s account of Dunia Baru is the clearest public illustration of fastener cost: the hull contract at the Konjo yard quoted USD 130,000, but USD 100,000 of bolts and fastenings were missing from that quote. On older vessels, fastener corrosion — sometimes called nail sickness — causes planks to work loose even when the timber itself is sound. Pull sample fasteners at random. Mixed metals (iron nails with bronze fittings, or vice versa) accelerate galvanic corrosion faster than any single metal would alone. Ask the yard or surveyor to core out two or three plank sections at the waterline so you can see the fastener shanks.
3. Garboard and Keel Integrity
The garboard strakes run along the keel, the lowest point of the hull that stays submerged longest. This is the first place both teredo and rot establish. Ironwood (ulin, Eusideroxylon zwageri) is dense enough that it resists worm better than most tropical timbers, but scarcity has pushed some yards toward substitute species in recent decades. Know what timber the hull is actually built from, not what the listing says.
4. Added Deck Cabins and Stability
Many phinisi have had cabins added to the main deck or upper deck after launch to increase the charter headcount. Each added structure raises the centre of gravity and changes the stability curve the original hull was designed for. Ask for the original stability booklet or any inclining experiment record. If neither exists — common on older vessels — commission an independent naval architect to assess the current configuration before you complete the purchase.
5. Deck-to-Hull Joint and Caulking
Traditional pakal caulking (cotton or fibre driven into seams, sealed with compound) requires regular renewal. On a vessel that has been on the hard or under-maintained, seams at the deck edge and garboards are the first to open. Check for recent recaulking: fresh compound in isolated seams while neighbouring seams are dry and cracked usually means cosmetic patching rather than systematic maintenance.
6. Structural Framing Condition
Frames carry the hull shape under load. Broken, checked, or sistered frames on a working liveaboard are a structural warning. On a phinisi, frames are typically bitti (Vitex cofassus) or ulin. Sistered frames — a new frame bolted alongside a failing original — are acceptable as a repair but should be disclosed and counted. A vessel with six sistered frames is different from one with twenty.
7. Below-Waterline Paint History
Ask for the antifouling application log: dates, paint type, yard name. If no log exists, you are buying without knowing when the hull was last properly protected. Antifouling for a 25–40 m vessel runs approximately IDR 30–100 million per application [estimate; varies by yard and product]. A vessel that has skipped a cycle in tropical waters has likely sustained biological damage.
8. Haul-Out Record
Standard practice for wooden commercial hulls in Indonesian tropical water is an annual haul-out for antifouling and inspection. If the vessel has not been on the hard for two or more years, price in a full haul-out inspection and the cost of whatever it finds before you make an offer. Yard time typically runs IDR 50–200 million per period [estimate], separate from repair costs.
9. The “Recent Refit” Warning
This matters enough to state plainly. In almost every used-liveaboard market, “recently refitted” means new paint, new cushions and upholstery, and possibly a repainted wheelhouse. It rarely means new structural planking, new frames, or a systematic recaulk. Before accepting any refit claim, ask for: the yard name, dated haul-out invoices, photographs taken during the work (not after), and the surveyor’s inspection report if one was commissioned. If the seller cannot produce dated invoices and yard photographs, treat the refit as cosmetic regardless of what the listing says.
Block 2: Machinery (Points 10–17)
Indonesian liveaboards — including phinisi — are frequently fitted with truck or industrial diesel engines converted for marine use. This is not inherently a problem; Hino, Mitsubishi Fuso, and similar units are reliable and parts are available throughout Indonesia. The problem is documentation.
10. Engine Make, Model, and Installation Date
Record the engine plate data yourself: make, model, serial number, rated horsepower, and date of manufacture if visible. Cross-check against any service records. An engine described as a “2023 repower” with a serial number dating to 2015 is telling you something.
11. Hour Meter and Service Records
Many converted truck engines are installed without a marine-grade hour meter, or the meter has been reset or replaced. If no hour meter is fitted, or if the meter shows an improbably low count for a boat that has been on charter for five seasons, demand dated service records from a named workshop. Engine overhaul intervals for diesel workhorses typically run 10,000–20,000 hours; a major overhaul in Indonesia runs approximately IDR 200–500 million [estimate]. Buying a boat without knowing where the engines sit in their service life is buying an unknown liability.
12. Reconditioned Engine Disclosure
“Reconditioned” engines are common in this market. A professionally reconditioned unit is not a problem if properly disclosed and documented. Ask for: the workshop name, the scope of work completed (full rebuild versus head gasket + injector service), the date of reconditioning, and the hour count at reconditioning. Refuse to rely on a verbal description.
13. Genset Condition and Capacity
A liveaboard running air-conditioned cabins, dive compressors, water makers, and galley equipment draws significant electrical load. Verify that the installed genset capacity matches the actual electrical load. Under-sized or worn gensets are among the most common deferred-maintenance items on used liveaboards.
14. Fuel System Integrity
Inspect the fuel tanks (material, age, signs of corrosion or weeping), fuel lines (deteriorated rubber, improvised connections), and the deck fills. A fuel fire on a wooden vessel is catastrophic. This is also a survey item that Indonesian Syahbandar (harbourmaster) inspectors have been scrutinising more closely following reported incidents in Komodo waters in recent years.
15. Electrical Wiring
Improvised wiring is one of the most consistent findings on mid-market Indonesian liveaboards. Look for overloaded breakers, exposed connections in bilge areas, unprotected wire runs near the engine room, and mixed-gauge wiring in the same circuit. Have a marine electrician — not the seller’s engineer — walk the boat.
16. Steering and Thruster Systems
Test the steering under power at the dock and, if possible, underway. Ask about the last time steering cables, hydraulic fluid, or quadrant components were serviced. A bow thruster fitted to a vessel with an inadequate hull reinforcement will have a working noise and feel that differs from a properly installed unit.
17. Bilge Pump Capacity and Condition
A wooden hull works in a seaway and will always take on some water. The bilge pump system must be functional and sized for the hull. Multiple manual backups are not a sign of a problematic vessel — their absence on a working liveaboard is.
Block 3: Paperwork (Points 18–24)
Indonesian vessel documentation is a layered system, and the chain of title for a used boat can contain gaps that are expensive to close — or in some cases, impossible to close without going back to court.
- Grosse Akta Kapal
- The primary title deed, held in the Direktorat Jenderal Perhubungan Laut (Ditjen Hubla) registry. Verify that the current ownership matches the seller, that there are no encumbrances or liens recorded, and that the akta has not been split or subject to a court dispute. A maritime lawyer — not a general notary — should run this search.
- Surat Ukur (Tonnage Certificate)
- Records the officially measured gross tonnage. Verify that the current configuration of the vessel (including any added deck structures) matches the measurement. Undeclared cabin additions may mean the registered tonnage no longer reflects the actual vessel.
- BKI Class Certificate
- Biro Klasifikasi Indonesia classification is the Indonesian standard for commercial vessels, required for most commercial operating licences and most insurance policies. If the vessel is out of class or has never been classed, price in the cost of bringing it into class, which may require structural remediation work beyond what a normal survey reveals.
- Safety Certificate (Sertifikat Keselamatan)
- Annual passenger ship safety certificates are required for commercial charter operation. Verify that the current certificate is valid and that it was issued — not just renewed on paperwork — after a physical inspection.
- SIUPAL or SIOPSUS
- The company-level sea-transport operating licence. This licence attaches to the owning entity, not the vessel. When you buy the boat, you are not automatically acquiring the licence; you need to transfer or obtain a new one through your own PT.
- Radio Licence and Pollution-Prevention Certificate
- Minor but required. Radio licences are vessel-specific. Confirm these are current.
18. Grosse Akta Chain of Title
Trace the ownership history from the original registration to the current holder. Informal family transfers — where a vessel passed between heirs without re-registration — create title defects that can surface years later. Undischarged ship mortgages (hipotek kapal) are recorded in the same registry; they do not automatically lapse on a private sale.
19. Lien and Debt Check
Beyond the formal mortgage registry, check for outstanding debts to yards, fuel suppliers, and crew. In Indonesian maritime practice, crew wage claims can travel with the vessel. A purchase that closes without clearing these creates a new owner who inherits the predecessor’s liabilities.
20. Class and Survey History
Request the full BKI class history: original classing date, renewal surveys, any conditions or recommendations outstanding. A vessel classed with conditions — planking renewal required within 12 months — is a vessel with a known structural liability that the seller may not be volunteering.
21. Safety Certificate Validity and Inspection Basis
Confirm the physical inspection date behind the current safety certificate, not just the expiry date on the paper. Post-2022, Indonesian Syahbandar has been conducting more rigorous spot inspections on Komodo and Raja Ampat liveaboards following reported incidents. A certificate issued without a thorough physical inspection is a liability in the event of a flag-check at sea.
22. Passenger Manifest and Capacity Certificate
The registered passenger capacity determines the legal maximum headcount. Vessels with added cabins sometimes operate above their certified capacity. Verify that the cabin count in the listing matches the certified passenger number.
23. Crew Manning Certificate
Safe-manning certificates specify the minimum crew the vessel must carry. Indonesian crew require ANT (navigation) or ATT (engineering) officer tickets plus BST (basic safety training). Verify that the vessel’s safe-manning certificate reflects its current configuration and that the current crew holds the required certifications. Foreign cruise directors and dive staff occupy a different regulatory category from ship’s crew.
24. Komodo or Raja Ampat Operating Permits
Commercial operation in Komodo National Park requires specific permits. These attach to the operating entity, not the boat. If you are buying a business as well as a vessel, confirm that the operating permits are transferable or that new ones can be obtained. Komodo NP permit regimes have been subject to regulatory change multiple times since 2019 [verified pattern]; confirm current requirements with the park authority before you model operating costs.
Block 4: Business Claims (Points 25–30)
When a liveaboard is sold as a going concern — with forward bookings, a management company relationship, and projected revenue — you are being asked to pay for a business, not just a boat. The due diligence requirements expand accordingly.
Before you proceed further, consider reaching out through our enquiry form or WhatsApp — we help buyers structure independent surveys and navigate the documentation phase. No obligation, and no one can pay to change what we publish; if you proceed with a partner through our free guidance, they may pay us a referral fee at no extra cost to you.
25. Verify Forward Bookings Independently
A listing that claims “USD X of confirmed bookings” for the coming season is claiming a revenue asset. Contact the booking agent or platform directly — not through the seller — and confirm that the bookings are under the vessel’s name, transferable to a new owner, and not simply re-listings of boats that cancelled. Ask for booking confirmation documents with client names and deposit records.
26. Check That Licences Are Tied to the Entity, Not the Boat
As noted in Block 3, operating licences in Indonesia attach to the registered company, not the vessel. A turnkey sale that promises a running business requires you to either acquire the existing PT (with all its liabilities) or obtain a new set of licences for your own entity. Indonesian cabotage law [verified: Law 17/2008 as amended by Law 66/2024] requires that commercial domestic carriage be operated by an Indonesian-flagged vessel owned by an Indonesian entity. Foreign buyers face a 49% foreign-equity cap in sea-transport companies. This is a structural constraint, not a technicality — engage Indonesian maritime counsel before you sign anything.
27. Understand the Booking Pipeline Source
Where do the bookings actually come from? An operator-managed vessel may have all its demand channelled through a management company that retains the client relationships. If you buy the boat without retaining that management relationship, you may be buying a hull with no pipeline. Management fees on Indonesian liveaboards run approximately 15–25% of gross for operations-only, rising to 25–35% when sales and marketing are included [estimate; market-practice range]. OTA and agent commissions add another 10–20% [estimate]. Combined, distribution costs of 30–45% of gross are realistic. Model this before you accept a stated revenue figure at face value.
28. Request Actual Bank Statements, Not P&L Summaries
A seller-prepared P&L summary reflects what the seller wants you to see. Bank statements for the operating account show what actually landed. Match deposit dates against the booking calendar. Unexplained gaps between claimed occupancy and actual receipts require explanation before close.
29. Assess Insurance Continuity
Hull and machinery (H&M) insurance for wooden Indonesian-flag commercial vessels runs approximately 1.5–4% of agreed value per year [estimate; no public premium data]. Some international insurers decline wooden hulls or require a BKI survey as a condition of cover. P&I (liability) for a small passenger vessel adds approximately USD 5–30,000 per year [estimate]. Confirm whether the existing policy is transferable, and get a quote for a new policy in your own entity’s name before you close. A vessel that is uninsurable or only insurable at 4% of a USD 500,000 agreed value is carrying USD 20,000 per year in insurance cost alone.
30. Commission an Independent Surveyor and Indonesian Maritime Counsel
All thirty points above can be rendered useless if the people inspecting the vessel and reviewing the documents are recommended by the seller. An independent surveyor — one you source, hire, and pay, who has no relationship with the broker or the current owner — is the only person whose opinion on hull condition you should trust in full. Indonesian maritime counsel, separate from any legal advisor the seller introduces, should review the title chain, flag the lien search, and advise on the ownership structure before any money moves.
The surveyor’s findings almost always change the negotiating position. Used-boat buyers in this market routinely see 20–40% discounts from asking price after survey findings are documented [estimate; market-observation pattern]. That discount is the market pricing in the uncertainty the listing obscures.
Summary Table: What to Demand Before Closing
| Category | Document or Evidence Required | Accept? |
|---|---|---|
| Hull refit claim | Dated invoices + yard name + photographs during work | No invoice = no credit for the work |
| Engine service history | Workshop name + dated service records + hour meter photo | Verbal description insufficient |
| Title / ownership | Grosse akta + Ditjen Hubla search for liens + maritime lawyer review | Notary summary insufficient; need registry search |
| Class / safety | Current BKI class certificate + safety certificate with physical inspection date | Paper renewal without inspection = not verified |
| Operating licences | SIUPAL or SIOPSUS + Komodo/Raja Ampat permits + confirmation of transferability | Licences may not transfer with the hull |
| Forward bookings | Direct confirmation from booking platform or agent, not via seller | Seller summary only = unverified revenue claim |
| Stability | Original stability booklet or naval architect assessment of current configuration | Especially critical where deck cabins were added post-launch |
| Hull condition | Haul-out inspection by independent surveyor + fastener core samples | Paint and cushions do not constitute a refit |
Frequently Asked Questions
How much does an independent marine survey cost for a used phinisi in Indonesia?
Survey fees vary by vessel size and surveyor; for a 25–40 m liveaboard, expect to budget roughly USD 1,000–3,500 for a comprehensive haul-out survey including written report [estimate; get quotes from at least two independent surveyors]. This is one of the lowest-cost risk-reduction steps available, relative to the purchase price.
What is a grosse akta and why does it matter?
The grosse akta kapal is the Indonesian vessel ownership deed, registered with Direktorat Jenderal Perhubungan Laut. It is the primary instrument of title. Informal sales, family transfers, and undisclosed ship mortgages can create gaps or encumbrances in the title chain that are expensive to resolve. A maritime lawyer should run a full registry search before any deposit is paid.
Can a foreigner buy and operate a liveaboard commercially in Indonesia?
Indonesian cabotage law requires that domestic commercial carriage of passengers be conducted by Indonesian-flagged vessels owned by Indonesian entities. Foreign equity in a sea-transport company is capped at 49% under the current Positive Investment List. Law 66/2024 further tightened these rules for new PMA companies. In practice, foreign investors typically participate as financiers in an Indonesian PT rather than as registered vessel owners. This is a legal structure question requiring Indonesian maritime counsel — this article is information, not legal advice.
What are the most common hidden defects on used Indonesian liveaboards?
Based on patterns across the market: teredo worm damage at the waterline and garboards, fastener corrosion behind recent paint, undisclosed engine reconditioning without service records, improvised electrical wiring in bilge and engine spaces, stability changes from post-launch cabin additions, and title gaps in the grosse akta chain from informal prior transfers. None of these are visible without a haul-out survey and a professional document review.
Does “recently refitted” add value to a used liveaboard listing?
Only if supported by dated invoices, a named yard, and photographs taken during the work — not after. “Recently refitted” in most used-liveaboard listings means cosmetic work: paint, soft furnishings, and sometimes a wheelhouse repaint. Structural recaulking, plank replacement, and systematic hull work leave a paper trail. If the seller cannot produce that trail, treat the refit claim as unverified.
This article is information, not advice. Before completing any used-liveaboard purchase in Indonesia, commission an independent marine surveyor of your own choosing and engage Indonesian maritime counsel to review the title, operating licences, and ownership structure. The 30 points above are a starting framework, not a substitute for professional inspection and legal review. If you want an independent sounding board on the process, use our enquiry form or reach us on WhatsApp — we have no position in the transaction and no financial interest in which vessel you buy.