IMarEST Pitches Reverse Auction Mechanism as Compromise Pathway for IMO Net-Zero Framework

The Institute of Marine Engineering, Science and Technology has entered the increasingly fractious debate over shipping's decarbonisation rulebook with a technical proposal designed to break the deadlock heading into MEPC 84. With repeated calls for unity coming from flag states, classification societies and shipowner associations, IMarEST has positioned its contribution as a mechanism that could satisfy both the ambition side of the negotiation and the practical implementation concerns raised by the growing opposition to the Net-Zero Framework in its current form. The proposal will be formally presented at a lunchtime session at the IMO on 23 April, with member state representatives, industry figures, technical experts and observers expected to attend, signalling that the Institute is treating MEPC 84 as the decisive window to inject a workable compromise into the regulatory conversation.

 

How the Reverse Auction Model Would Function

 

At the core of the IMarEST submission is the use of reverse auctions to channel subsidies generated through the Net-Zero Framework toward the technical solutions most likely to achieve widespread deployment and deliver meaningful emissions reductions. In a reverse auction structure, suppliers of clean technologies or fuels would compete to offer the lowest cost of abatement, with support flowing to the most efficient bidders rather than being spread thinly across the full range of decarbonisation options. IMarEST argues that this approach avoids one of the central weaknesses of broad subsidy regimes, which is the tendency to dilute incentives to the point where no single technology reaches the scale required to become commercially viable.

 

Link to Proven Renewable Energy Mechanisms

 

The Institute is drawing directly on the track record of reverse auctions in terrestrial renewable energy, where the mechanism has been credited with driving steep cost reductions in solar photovoltaics and onshore wind over the past decade. The argument being made to IMO member states is that a tool already validated in land-based energy transitions can be adapted to shipping's specific conditions, where fuel pathways, vessel retrofits and bunkering infrastructure all compete for the same pool of transition capital. By framing the proposal around an established policy instrument rather than an untested mechanism, IMarEST is positioning reverse auctions as a lower-risk option for regulators that have otherwise been wary of experimental financing structures.

 

Read more: Flag State Heavyweights Break Ranks on IMO Net-Zero Framework as MEPC 84 Nears

 

Five Percent Adoption Threshold and UCL Research Basis

 

The technical backbone of the proposal comes from research conducted at University College London, which suggests that sector-wide uptake of a new technology typically accelerates once adoption reaches around five percent of the industry. IMarEST argues that directing IMO funding to push the most promising solutions past that threshold would generate a disproportionately large impact relative to the capital deployed, lowering the cost of the transition for the industry as a whole. This framing gives regulators a measurable target to aim at and shifts the conversation away from broad per-tonne carbon pricing mechanisms toward a results-oriented deployment strategy that can be benchmarked against real adoption data.

 

Capital Mobilisation and Investment Signalling

 

IMarEST technical and policy director Alasdair Wishart has framed the reverse auction mechanism as a tool capable of unlocking the billions of dollars of capital that shipping will need to finance new energy production and supply chains. The logic behind that claim is that private capital is already available but is being held back by regulatory uncertainty, and a clearly structured auction mechanism would give investors the pricing signals and demand visibility they need to commit. Wishart also warned that without clear direction from the IMO on meeting 2050 emissions targets, the sector risks fragmenting into a patchwork of national and regional rules, echoing the same concern that has been voiced by major flag states and industry associations in recent weeks.

 

Scientific Case for a Rapid Fuel Shift

 

The proposal is reinforced by the views of Tristan Smith, IMarEST's IMO delegate and a UCL professor who has been among the most influential academic voices on shipping decarbonisation policy. Smith argued that research consistently shows shipping must shift rapidly to renewable energy production and supply chains if the sector is to meaningfully contribute to slowing climate change, and that a continued reliance on fossil fuels is not a viable pathway. His intervention positions the reverse auction proposal not as a softening of ambition but as a practical delivery mechanism for the level of fuel transition that climate science requires from the sector.

 

Relevance to the MEPC 84 Political Landscape

 

The IMarEST proposal lands in a negotiating environment where the Net-Zero Framework is under significant pressure from a coalition representing around half of the world's fleet, with Liberia, Panama, the Marshall Islands and several Greek and Saudi shipowner interests urging member states to consider alternatives. In that context, reverse auctions offer regulators a potential middle path, retaining the revenue-raising logic of the Net-Zero Framework while redirecting the use of those funds toward targeted deployment rather than broad incentives. For member states searching for a formula that can rebuild consensus, a technically grounded proposal from a professional engineering institute may carry weight precisely because it is detached from the commercial and geopolitical interests that have come to dominate the wider debate.

 

Implications for the Decarbonisation Pathway

 

If the reverse auction concept gains traction at MEPC 84, the consequences for the shipping decarbonisation pathway could be substantial. A targeted subsidy mechanism would influence which alternative fuels and technologies reach commercial scale first, effectively shaping the sector's transition trajectory through capital allocation rather than prescriptive regulation. That outcome would also have knock-on effects for bunkering infrastructure investment, newbuild order specifications and the competitive positioning of fuel suppliers, because early auction winners would gain a significant advantage in establishing supply chains and securing long-term offtake. Whether or not the proposal is formally adopted in the MEPC 84 cycle, its introduction reflects a broader shift in the debate toward mechanisms that prioritise deliverability and measurable deployment over headline ambition.