Vessels are being prepared while ports are still years away.
With long lead times, unclear port plans and inconsistent standards.
Honest transparency about timelines and concrete connection dates.
Those who recognise early where plans genuinely overlap can prioritise investments more effectively.
The fundamental problem is structural: vessels are ordered and delivered in cycles of three to four years, whilst port infrastructure projects typically require five to ten years – from planning through permitting to commissioning. This temporal asymmetry means that vessels with alternative propulsion are delivered before ports can provide the corresponding bunkering infrastructure.
With LNG, this problem is already visible. Although LNG bunkering capacity in the major European and Asian ports has grown significantly in recent years, substantial supply gaps persist outside the main routes. LNG dual-fuel vessels deployed beyond the established corridors frequently have to revert to conventional fuel – undermining the economic advantage of dual-fuel technology.
With methanol and ammonia, the discrepancy is even more pronounced. Methanol bunkering capacity is currently limited to a handful of ports, including Rotterdam, Singapore and several Scandinavian locations. Ammonia bunkering does not yet exist at commercial scale. Yet hundreds of vessels with methanol and ammonia readiness have already been ordered or are in operation.
Shore power exacerbates the timing problem further. The EU will require connection to shore power for container and cruise vessels in TEN-T ports from 2030. The shipside retrofit is technically feasible, but the port-side infrastructure – transformers, cable routes, frequency converters – is in many ports not even planned. The result: vessels are retrofitted but cannot use the technology for want of port infrastructure.
The misalignment of port and vessel timelines has direct consequences for the economics of investments. Anyone ordering a methanol-capable vessel but unable to bunker methanol for five years carries the additional costs of the dual-fuel system for five years without the corresponding benefit. The financing structure must account for this lead-time phase.
For charterers, a similar problem arises. If a charterer charters a vessel with alternative propulsion to reduce Scope 3 emissions but the fuel is not available on the planned routes, the emission benefit remains theoretical. Charter agreements must therefore contain clauses defining fuel availability as a condition for the obligation to use it.
Port operators face the reverse dilemma: investments in bunkering infrastructure only pay off above a certain minimum throughput. As long as insufficient vessels running on the corresponding fuel call at the port, the economic foundation for the investment is lacking. This chicken-and-egg problem can only be resolved through coordinated planning between owners, charterers and port operators.
Rotterdam has positioned itself as a frontrunner and is actively investing in methanol and hydrogen infrastructure. The port has published concrete timelines for expanding bunkering capacity and works closely with shipping companies to synchronise supply and demand. This model works because Rotterdam has the volume to justify investments.
For smaller ports, the calculation is different. A regional port with few calls per week can barely justify the investment in methanol bunkering infrastructure economically. Operators whose routes include such ports must therefore either adjust their route planning or accept that the alternative fuel can only be used on partial legs.
The Scandinavian ports demonstrate a middle path: through state subsidies and clear political mandates, investments are brought forward even when the immediate throughput does not yet support the economics. This model is politically dependent and not readily transferable to other regions.
Operators should conduct a timing analysis for every planned fuel transition: when will the vessel be delivered or converted? When will the fuel be available on the main routes? How large is the gap between the two points, and what costs arise during this gap?
If the gap exceeds three years, the investment decision should be reconsidered – either by deferring the shipside investment or by choosing a fuel pathway with better infrastructure availability. Ideally, operators should not rely on general roadmaps but on contractual commitments from specific port operators and suppliers.
Given how unpredictable port-side bunkering timelines have proven to be, an increasing number of owners specify newbuildings for flexibility rather than committing fully to one fuel pathway at the order stage. This typically means reserving engine room space and structural provisions for a future fuel system conversion – sometimes described as fuel-ready or ammonia-ready notations – without installing the full dual-fuel machinery from day one. The vessel enters service on conventional fuel and is converted once the fuel and port infrastructure it needs are actually available on its trading routes.
This approach shifts risk rather than eliminating it. The owner avoids paying the full dual-fuel premium years before it can be used, but takes on the cost and yard time of a later conversion, plus the uncertainty of whether the reserved space and structural provisions will still match the fuel system eventually chosen. Specification decisions made today – tank location, piping runs, fire zone boundaries – can lock a vessel into a narrower set of future conversion options than the fuel-ready label suggests, so the detail of what is actually reserved matters more than the label itself.
For owners weighing this route, the practical question is not whether flexibility is desirable but how much of it can be built in without compromising the vessel's day-one economics. A design that reserves genuinely convertible space, reviewed against more than one candidate fuel, protects optionality far better than a notation attached to a design that was never actually stress-tested against the alternatives it claims to support.