A vessel is not finished when it floats; it is finished when it has papers. For a traditionally built wooden hull the documentation route runs backwards compared with a conventional newbuild — the vessel is measured, documented and assessed as built, rather than approved from plans beforehand. That works, but only if the evidence was collected while the structure was still visible. Registration is decided at the keel, not at the launch.
Why the order is inverted
A conventional classed newbuild starts with plan approval: drawings are submitted, a class society reviews them, construction proceeds under survey against approved plans. At Tana Beru there are no drawings — the hull is built shell-first from the master shipwright’s judgement, as set out in the Konjo method.
So the sequence becomes: build, document thoroughly as you go, then present the as-built vessel for measurement, survey and registration. The vulnerability is obvious. A surveyor cannot inspect a frame that the sole now covers, or caulking that is under two coats of paint. Anything not witnessed and recorded while open is, for documentation purposes, unproven. That is the entire argument for engaging independent supervision from the keel rather than the launch.
The elements you will encounter
| Element | What it concerns |
|---|---|
| Builder’s evidence | Documentation that this vessel was built, by whom, when, and to what specification — the build record |
| Measurement | Official measurement establishing tonnage, which drives which registration category and requirements apply |
| Registration and ownership documents | Registration of the vessel and recording of its ownership; the certificate commonly referred to as Pas Besar applies to larger vessels, with other categories for smaller craft |
| Flag | The state of registry, which determines the regulatory regime, crewing and what the vessel may do commercially |
| Classification | Optional for some vessels, required for others. Biro Klasifikasi Indonesia (BKI) is the Indonesian classification society |
| Statutory safety certification | Safety equipment, stability information and certification appropriate to trade area and passenger numbers |
Requirements, thresholds and procedures in this area change, and they differ by vessel size, trade and intended use. Treat this as a map of what exists rather than as current procedure, and confirm specifics with a competent Indonesian agent or the relevant authority at the time you need them.
Tonnage is the hinge
More of the regulatory consequence turns on measured tonnage than owners expect. It affects which registration category applies, which certificates are required, crewing expectations and survey regime. Because tonnage follows from dimensions and internal volume, it follows from the specification — which means a decision made casually early (“let’s add half a metre of beam”) can move the vessel into a different regulatory bracket.
This is a good reason to have the intended registration outcome in mind while the specification is being written, as covered in commissioning a build, rather than measuring afterwards and discovering the bracket you landed in.
Commercial use changes everything
The single largest divide is between a private vessel and one carrying paying passengers. Commercial passenger carriage in Indonesian waters has long been restricted to Indonesian-flagged vessels, and a vessel selling cabins faces requirements on construction standards, survey, safety equipment, stability documentation and crew that a private yacht does not.
Those requirements have physical consequences — bulkheads, escape routes, tankage, machinery space arrangements — that are committed during construction. Deciding at month eight that a vessel should be certified for guests is usually too late to be inexpensive. The honest answer on foreign commissioning covers the ownership and flag questions that sit alongside this.
The evidence file, and what belongs in it
Start it at the keel and add to it at every milestone:
- The written build specification and every approved written variation
- Timber legality documentation for each delivery — see the wood question
- Dated photographic records at each milestone, with scale in frame, before the stage is concealed
- Signed milestone certificates and defect lists with their remedies
- Measurements recorded against specification lines: scantlings, frame spacing, plank thickness
- Machinery, equipment and safety-gear certificates, serial numbers and manuals
- Records of any survey attendance during construction
- Launch and post-launch records, including take-up behaviour and any remedial work
This file is not bureaucracy. It is the vessel’s provenance, and it does three jobs: it gets the vessel registered, it makes insurance straightforward, and it materially raises the resale value against an otherwise identical hull with no history.
Sequence it properly
- Decide use, ownership structure and flag before the keel is laid
- Write the specification to the certification standard that use requires
- Engage supervision that documents to a standard a surveyor will accept
- Collect evidence at each milestone, before concealment
- Arrange measurement and survey at the appropriate points, not all at the end
- Complete registration and certification before committing the vessel to service
- Plan the delivery voyage after certification, not before — see the delivery voyage
The mistake to avoid
Treating documentation as an administrative task for the end of the project. On a traditionally built wooden vessel it is not administration — it is the substitute for the approved drawings that were never produced. Collected as you go, it is straightforward. Requested at handover, much of it simply cannot be created, because the structure it would have described is now under a sole, a lining and two coats of paint.
Supervision, survey and construction contracts in this service class are issued by PT Komodo Galangan Nusantara, with values stated in USD.
Frequently asked questions
Why is registering a traditionally built wooden vessel different?
Because there are no approved plans. A conventional newbuild is approved from drawings before construction; a wooden hull built without drawings is measured, documented and assessed as built afterwards, which means the evidence must be gathered while the structure is still visible.
What is Pas Besar?
It is the vessel registration certificate applying to larger vessels in Indonesia, with other categories applying to smaller craft. Which category applies follows from official measurement of the vessel’s tonnage.
What is BKI?
Biro Klasifikasi Indonesia, the Indonesian classification society. Classification is optional for some vessels and required for others, depending on size, trade and intended use.
Why does measured tonnage matter so much?
Because it determines which registration category, certificates, crewing expectations and survey regime apply. Since tonnage follows from dimensions and internal volume, a casual change to the specification can move a vessel into a different regulatory bracket.
When should documentation start?
At the keel. Timber legality documents, milestone photographs, signed certificates and recorded measurements can only be created while the relevant work is open. Requested at handover, much of it cannot be produced at all.