Shipbuilding
Half to sixty percent of a ship's cost is steel and the welding of it, which makes shipbuilding a productivity business before it is a technology business. The technology matters at the margin — and in the highest-value vessel types, the margin is where the licences are.
Steel is the bulk of the cost, so labour productivity per tonne decides competitiveness. But engines, containment systems and design IP are where the specialised value sits, and those are largely licensed in.
The value chain, and where it is concentrated.
Eight layers, from drawing to launch
- Vessel designCompliance with international maritime standards. For specialised vessels such as gas carriers, design capability is concentrated in a few Japanese, Korean and European houses, and is commonly licensed rather than owned.
- Containment systemsCryogenic membrane tank technology for liquefied gas — a proprietary, tightly held specialism and a genuine bottleneck for any yard entering that segment.
- Engine & propulsionMain engines, propeller and shaft, generators, environmental systems, automation. Dominated by a handful of global names.
- StructureShipbuilding-grade steel plate, welding consumables, paint. The largest cost block by far.
- Deck equipmentHydraulics, hatch covers, control systems.
- Living & safetyHVAC, firefighting, galley and crew systems. The most readily localised layer.
- CoatingsAnti-fouling paints that reduce drag and fuel consumption — a performance input, not a finish.
- YardFinal assembly, welding and systems integration. Global commercial capacity is heavily concentrated in East Asia.
Cost structure of a vessel
| Component | Share of price |
|---|---|
| Structure — steel & welding | 50–60% |
| Main engine | 9–12% |
| Deck equipment | 4–6% |
| Painting | 3–5% |
| Propeller & shaft | 2–4% |
| Electric generator | 2–4% |
| Living areas & safety | 2–4% |
| Environmental equipment | 2–3% |
| Automation & navigation | 1–2% |
Other propulsion, power generation and control equipment collectively adds a further 10–15%. The concentration in structure is what makes steel cost and welding productivity the competitive battleground.
Where a yard can compete, and where it cannot yet.
The cost advantage is real but partial. With structure at 50–60% of vessel cost, access to competitively priced shipbuilding-grade steel is a genuine advantage, and Indian steel supply is capable of serving it. What offsets it is labour productivity: the established East Asian yards convert steel to finished vessel at a rate that remains materially ahead, and productivity gaps of that kind are closed over years of throughput, not by capital alone.
The high-value layers are imported. Marine-grade main engines and propulsion systems are largely sourced from a small group of global manufacturers. Domestic suppliers serve auxiliary systems, but high-horsepower marine propulsion is not substantially localised. For specialised vessels, containment technology and design IP are licensed in under technology transfer arrangements — which means a yard can build the vessel while the highest-margin intellectual property sits elsewhere.
Defence and offshore differ from commercial. Naval and offshore vessel construction is a materially stronger domestic position than commercial shipbuilding, where global market share is concentrated in East Asia to an overwhelming degree. The two should be modelled separately: defence work carries different order visibility, payment terms and margin structure, and is not exposed to the same global freight cycle.
Repair is a distinct and useful business. Dry docking, maintenance and overhaul run on a different cycle from newbuild — recurring, less capital-intensive per unit of revenue, and less exposed to the ordering cycle. A yard with meaningful repair revenue has a more stable base than one dependent on newbuild alone.
The localisation opportunity is in the middle layers. HVAC, electricals, interiors, deck equipment and marine coatings are all within reach of existing domestic industrial capability. That is where import substitution is credible in the near term — not in engines or containment systems.
Productivity, vessel mix, and technology position.
Steel throughput productivity
With structure at over half the cost, tonnes of steel processed per worker-hour is the competitiveness measure. Closing the productivity gap matters more than any single equipment localisation.
Vessel mix
Defence, offshore and specialised vessels carry better margins and different cyclicality from commercial newbuild. Mix determines whether a yard is exposed to the global freight cycle or insulated from it.
Moving up the technology stack
Technology transfer arrangements are a route in, not a destination. Yards that convert licensed capability into owned design and containment IP capture the margin currently paid away.
What to answer before underwriting.
- →Vessel mix. Defence, offshore, commercial newbuild and repair — by revenue and by order book. These are four different businesses.
- →Order book conversion. Revenue against opening order book. Slow conversion on a large book is the sector's characteristic trap.
- →Steel productivity. Tonnes processed per worker-hour, and how it compares with the yard's own history rather than with global benchmarks alone.
- →Import content. Which layers are imported — engines, propulsion, containment, design — and what proportion of vessel cost that represents.
- →Technology transfer terms. What any licence actually conveys, its duration, royalty, and whether it permits export.
- →Repair revenue share. Dry docking and overhaul provide a stabiliser against the newbuild cycle. How large is it?
- →Payment milestones. Progress payment structure against the build schedule, and working capital absorbed between milestones.
- →Capacity and dock constraints. Physical berth and dock availability caps concurrent builds regardless of order intake.
- →Steel procurement. Contracted or spot, and whether contracts carry escalation against a build spanning years.
- →Localisation roadmap. Which middle layers — deck equipment, HVAC, interiors, coatings — are being brought in-house, with what margin effect.
What to monitor, quarter by quarter.
| KPI | Calculation | Benchmark or read-through |
|---|---|---|
| Order book / revenue | Closing book ÷ TTM revenue | Long by nature; meaningless without the conversion rate beside it |
| Order book conversion | Revenue ÷ opening order book | The execution measure; chronic slippage is the sector's failure mode |
| Vessel mix | Defence / offshore / commercial / repair | Determines margin and cyclicality more than volume does |
| Steel throughput | Tonnes processed per period | The productivity proxy; structure is 50–60% of cost |
| Steel cost per tonne | Procurement cost | The dominant input; check escalation cover on multi-year builds |
| Import content % | Imported inputs ÷ vessel cost | Engines and containment are the persistent dependencies |
| Repair revenue share | Dry dock and overhaul ÷ total | The stabiliser against the newbuild ordering cycle |
| Dock utilisation | Occupied dock-days ÷ available | A hard physical constraint on concurrent builds |
| Working capital days | Inventory + debtors − advances | Milestone payments make this lumpy; watch the trend, not the level |
| Advances received | Customer advances ÷ order book | Higher advances fund the build and reduce the funding gap |
| Cost overrun on delivered vessels | Actual vs contracted cost | Fixed-price multi-year contracts carry real estimation risk |
| On-time delivery | Vessels delivered to schedule | Liquidated damages attach to slippage |
How the thesis breaks.
- !Order book that will not convert. Multi-year builds and milestone payments mean a large backlog can sit largely unrealised. Always read conversion alongside intake.
- !Fixed-price contracts over long builds. Steel and equipment costs move over the years a vessel takes to build. Without escalation cover, the yard absorbs it.
- !Productivity gap. A steel cost advantage can be entirely offset by lower conversion productivity against established global yards.
- !Dependence on licensed technology. For specialised vessels, design and containment IP is licensed. Terms, royalties and export permissions all constrain the economics.
- !Commercial market concentration. Global commercial shipbuilding share sits overwhelmingly with East Asian yards. Competing there on price alone is difficult.
- !Freight cycle exposure. Commercial newbuild ordering follows shipping rates, which are volatile. Defence and repair revenue are the offsets.
- !Delivery penalties. Liquidated damages on late delivery can erase the margin on a vessel that was profitable on paper.
The figures, and where they stand.
| Metric | Value | Note | Basis |
|---|---|---|---|
| Structure — steel & welding | 50–60% | Of vessel cost; the competitive battleground | Research note |
| Main engine | 9–12% | Largely imported | Research note |
| Other propulsion & equipment | 10–15% | Power generation, control systems | Research note |
| Deck equipment | 4–6% | Localisable | Research note |
| Painting | 3–5% | Anti-fouling; a fuel-efficiency input | Research note |
| Propeller / generator / living areas | 2–4% each | Living areas the most readily localised | Research note |
| Environmental equipment | 2–3% | Ballast treatment, scrubbers | Research note |
| Automation & navigation | 1–2% | Radar, AIS, control | Research note |
| LNG containment temperature | −162°C | Why cryogenic membrane technology is a bottleneck | Technical |
| Container manufacturing concentration | ~82% | Held by the top three global manufacturers | Research note |
| Commercial newbuild share | Concentrated in East Asia | India's commercial export share is under 1% | Research note |