Blue Economy
FROM OCEAN TO ENGINE: How Seawater-to-Hydrogen Technology Could Reshape the Future of Maritime Fuel
FROM OCEAN TO ENGINE: How Seawater-to-Hydrogen Technology Could Reshape the Future of Maritime Fuel
Breakthrough electrolysis systems promise to turn the world’s most abundant resource into clean shipping energy — and the implications for global shipping are profound
By Raymond Gold | Co-publisher and Research Reporter| Waterways News, Lagos
For centuries, the sea has been both highway and hazard for the world’s merchant fleets — a vast, untameable resource that ships cross but cannot consume. That relationship may now be on the verge of a fundamental transformation. Engineers and clean-energy researchers are advancing technology that converts seawater directly into hydrogen fuel, potentially allowing vessels to generate their own power from the very ocean beneath their hulls.
The concept, long theorised in academic and engineering circles, has in recent years moved closer to practical application. And for an industry under mounting pressure to decarbonise — shipping accounts for nearly three percent of global greenhouse gas emissions annually — the implications could hardly be more consequential.
What the Technology Does
At its core, seawater-to-hydrogen conversion exploits a deceptively simple chemistry: water, whether fresh or saline, is composed of hydrogen and oxygen atoms that can be separated through electrolysis — the application of electrical current to drive a chemical reaction. In conventional electrolysis, this process uses purified water. The innovation driving current research is the ability to perform this separation efficiently using raw seawater, bypassing the costly and energy-intensive step of desalination.
The challenge is considerable. Seawater is not merely water with dissolved salt; it is a complex mineral solution containing chlorides, sulphates, magnesium, calcium, and dozens of trace elements that aggressively corrode standard electrolysis equipment and compromise catalytic efficiency. Overcoming this requires specialised membrane materials, corrosion-resistant electrode coatings, and advanced catalyst designs capable of selectively extracting hydrogen without triggering the destructive chlorine evolution reactions that plague conventional systems.
Several research institutions — including teams at Stanford University and in China’s leading materials science faculties — have demonstrated functional seawater electrolysis cells in laboratory conditions. The next frontier is ruggedising these systems for the rolling, salt-spray environment of an operational vessel on an ocean crossing.
Once extracted, the hydrogen can be deployed aboard ship in two primary ways: through hydrogen fuel cells, which generate electricity through an electrochemical reaction between hydrogen and oxygen with water as the only byproduct; or through combustion in modified engine systems, including hydrogen-driven steam turbines — a technology that echoes the steam age of maritime history but points firmly toward a zero-emission future.
Why This Matters for Shipping
The global shipping industry moves approximately 90 percent of world trade by volume. It runs almost entirely on heavy fuel oil and marine diesel — fossil fuels that produce sulphur oxides, nitrogen oxides, particulate matter, and carbon dioxide at scale. The International Maritime Organisation (IMO) has set a target of net-zero greenhouse gas emissions from international shipping by or around 2050, with intermediate milestones that are already forcing operators and flag states to act.
Alternative fuels — LNG, methanol, ammonia, and green hydrogen — are being explored across the industry. Each carries its own infrastructure challenge. LNG requires cryogenic bunkering terminals. Ammonia is toxic and demands careful handling protocols. Green hydrogen, produced from renewable electricity, depends on an entirely new supply chain that does not yet exist at the scale shipping requires.
Onboard seawater electrolysis sidesteps this infrastructure dependency entirely. A vessel equipped with the technology would, in principle, generate its own fuel continuously during a voyage, powered by renewable energy sources — solar arrays, wind-assisted propulsion, or wave energy convertors — installed on the ship itself. The bunkering port visit, one of the central logistics events in any ocean voyage, could eventually become optional rather than obligatory.
“The vision is genuine maritime energy autonomy,” one marine engineer familiar with current research described it. “You leave port, and the ocean provides.”
The Engineering Obstacles
The path from laboratory demonstration to commercial deployment is rarely short, and seawater electrolysis faces specific engineering obstacles that require resolution before any shipowner will commit capital to a retrofit or newbuild specification.
Foremost among these is the corrosion problem. The electrolytic cell, the filtration system, and all downstream hydrogen handling components must withstand not only the mineral aggressiveness of seawater but also the physical stresses of a marine operating environment — vibration, temperature cycling, and the mechanical demands of continuous operation over voyages measured in weeks. Catalysts and membranes that perform well in controlled conditions may degrade rapidly under these stresses, driving up maintenance costs and reducing reliability.
Filtration is a related challenge. Seawater must be processed through multi-stage filtration to remove particulates, biological matter, and the heaviest dissolved minerals before it reaches the electrolysis cell. The design and maintenance of these filtration trains — compact enough to fit within a vessel’s existing hull footprint without displacing cargo capacity — is itself an active area of engineering research.
Energy efficiency is perhaps the most critical metric. Electrolysis is not thermodynamically free; splitting water requires energy input, and on a vessel where every kilowatt-hour must be generated or stored, the round-trip efficiency of the fuel generation cycle determines whether the system is economically viable. Current state-of-the-art electrolysers operate at between 60 and 80 percent efficiency in ideal conditions. Marine seawater systems are not yet at the upper end of that range.
Scale is the final variable. A research cell producing grams of hydrogen per day is a proof of concept. A commercial system capable of fuelling a Panamax bulker or a large container vessel across the Pacific must produce hydrogen at a rate orders of magnitude higher, consistently and safely, in a package that integrates with existing ship systems and satisfies classification society and flag state safety requirements.
Nigeria Watch: What This Means for West Africa’s Maritime Sector
For Nigerian shipping stakeholders — from the Nigerian Maritime Administration and Safety Agency (NIMASA) to the Nigerian Ports Authority (NPA), private shipowners, and the Federal Ministry of Marine and Blue Economy — seawater-to-hydrogen technology warrants close attention even at this early stage of development.
Nigeria’s maritime sector is undergoing a strategic pivot. The revival of a national carrier through partnerships with DP World and AD Ports Group, the deepening of Lekki Deep Sea Port operations, and the Federal
Government’s blue economy agenda all signal ambitions to position Nigeria as a maritime hub rather than merely a transit market. The vessels and fleets that will carry those ambitions — whether coastal tankers, offshore support vessels, or deep-sea cargo ships — will be subject to increasingly strict international emissions standards as they operate in foreign ports and trade lanes.
The European Union’s Emissions Trading System now applies to shipping, and vessels calling at European ports are already paying a carbon price on their voyages. The IMO’s Carbon Intensity Indicator (CII) regulations are tightening year on year. Nigerian-flagged vessels, and Nigerian operators trading internationally, cannot remain insulated from these requirements indefinitely.
A technology that enables onboard fuel generation from seawater would be particularly valuable for the offshore oil and gas support sector — a significant component of Nigeria’s maritime economy — where vessels operate far from shore for extended periods and fuel logistics represent a meaningful proportion of operating costs. Patrol and surveillance vessels operated by NIMASA and the Nigerian Navy, which must sustain extended coastal and offshore operations, represent another potential application domain.
The immediate priority for Nigerian maritime regulators and industry associations is awareness and engagement: monitoring the development trajectory of seawater electrolysis systems, participating in IMO technical working groups on alternative fuels, and ensuring that when commercial systems begin to reach the market — an eventuality most analysts place in the 2030s — Nigerian operators and shipyards are positioned to adopt rather than adapt belatedly.
Looking Ahead
The conversion of seawater into hydrogen fuel will not decarbonise global shipping overnight. The technology faces real, unresolved engineering challenges, and the capital cycle of the shipping industry — where vessels are built to operate for 25 years or more — means that transformation is necessarily gradual. But the direction of travel is clear, and the pace of research is accelerating.
What was speculative a decade ago is now demonstrable in laboratory conditions. What is demonstrable today will, with sustained investment and engineering ingenuity, be deployable at sea within the decade. For an industry that has powered itself with fossil fuels since the coal age, the prospect of drawing energy from the ocean itself represents not merely a technical advance but a philosophical one: a shift from consuming the earth’s finite reserves to harvesting the planet’s most inexhaustible resource.
The sea, in other words, may one day fuel the ships that sail in it.
Raymond Gold is Co-publisher and Research Reporter for Waterways News
Waterways News covers the Nigerian and West African maritime sector. For enquiries, advertising, and editorial submissions, visit www.waterwaysnews.ng
Lagos Deputy Speaker Throws Weight Behind 8th WISTA Africa Conference
By Samson Onoharigho | Waterways News
The Deputy Speaker of the Lagos State House of Assembly, Rt. Hon. Mojisola Lasbat Meranda, has pledged her support for the 8th WISTA Africa Regional Conference and confirmed she will personally attend the continental maritime event, billed to take place in Lagos later this month.
Meranda gave the commitment when she received a delegation of the Women’s International Shipping and Trading Association (WISTA) Nigeria, led by its President, Dr. Odunayo Ani, during a courtesy visit to her office. The visit formed part of WISTA Nigeria’s pre-conference stakeholder outreach, targeting key institutional and legislative voices ahead of the gathering expected to draw policymakers, maritime regulators, industry operators, development partners, academics and professionals from across Africa.
Ani formally invited the Deputy Speaker and women across Lagos State to participate in the conference, scheduled for June 25 and 26, 2026, at Eko Hotel and Suites, Victoria Island, Lagos. She said the event, themed “From Policy to Implementation: Women Advancing Africa’s Blue Economy through Sustainable Shipping, Trade and Energy Innovation,” would focus on translating high-level policy commitments into concrete, sector-wide action.
The WISTA Nigeria president underscored Lagos’s pivotal role in Africa’s maritime economy, arguing that the visible participation of women leaders from the state would lend significant weight to ongoing advocacy for broader female representation in maritime decision-making, innovation, and economic governance.
A group photograph of WISTA Nigeria delegation with the Lagos Deputy Speaker, during a courtesy visit last week
“The support and participation of women leaders in Lagos State will enrich discussions and help advance the drive for greater female representation and inclusion across Africa’s maritime and blue economy sectors,” Ani said.
She also called on the Lagos State House of Assembly to mobilise women across the state for the conference, describing it as a rare platform for shaping a more inclusive and equitable future for Africa’s blue economy.
Responding warmly, Meranda commended WISTA Nigeria’s consistent contributions to championing women in the maritime industry and reaffirmed her longstanding relationship with the association. She confirmed her attendance and pledged active support for initiatives geared toward widening women’s participation across the blue economy value chain.
Nigeria Watch
The 8th WISTA Africa Regional Conference arrives at a moment of heightened policy activity in Nigeria’s maritime sector — from ongoing cabotage reform conversations and the CVFF disbursement saga to the broader push to position Nigeria as the hub of Africa’s blue economy. That WISTA Nigeria chose Lagos as the host city is no accident: with the Apapa and Tin Can Island ports, the emerging Lekki Deep Seaport complex, and the administrative machinery of NIMASA and the NPA all concentrated in the commercial capital, Lagos remains the operational heartbeat of Nigeria’s shipping industry.
What stands out about this edition is the deliberate legislative buy-in. Securing the endorsement of the Lagos Deputy Speaker is not merely symbolic — it signals an attempt to build bridges between the maritime industry and the lawmaking architecture that ultimately shapes port governance, cabotage enforcement, and blue economy investment policy. For an industry that has long complained of regulatory fragmentation and legislative indifference, that kind of outreach matters.
The conference theme — moving from policy to implementation — also resonates sharply in the Nigerian context. Nigeria has no shortage of blue economy frameworks, maritime masterplans, and gender inclusion commitments on paper. The harder challenge, as industry stakeholders consistently note, is converting those documents into enforceable regulation, funded programmes, and genuine career pathways — particularly for women, who remain significantly underrepresented at the senior levels of Nigerian shipping, port management, and maritime trade.
Port operators, shipowners, freight forwarders and terminal managers attending the June 25–26 conference would do well to engage the implementation-focused sessions closely. The conversations there are likely to feed back into the policy pipeline affecting their operations.
Waterways News | Maritime & Blue Economy Reporting
Nigeria Projects Blue Economy Vision at Our Ocean Conference in Mombasa
By Okeoghene Onoriobe | Waterways News Correspondent
Nigeria has stepped onto the global stage to assert its maritime ambitions, with the Minister of State for Foreign Affairs, Ambassador Sola Enikanolaiye, representing President Bola Tinubu at the Our Ocean Conference currently holding in Mombasa, Kenya.
The three-day summit, running from June 16 to 18, convenes heads of state, ministers, investors, environmental advocates, policymakers and civil society leaders to advance concrete solutions for protecting the world’s oceans while unlocking their economic potential. Since its founding in 2014, the conference has built a reputation as one of the world’s most outcome-driven environmental forums, with a strong record of converting pledges into verifiable action.
This year’s edition places Africa’s blue economy at the centre of deliberations, acknowledging its role in sustaining more than 50 million livelihoods across the continent’s 38 coastal nations. Key discussions are focused on persistent threats to marine ecosystems — illegal, unreported and unregulated (IUU) fishing, plastic pollution, rising ocean temperatures and the urgent need for expanded marine protected areas.
Nigeria is expected to use the platform to articulate its position as West Africa’s foremost maritime nation, drawing attention to ongoing efforts to develop its blue economy framework, reinforce maritime security architecture in the Gulf of Guinea, and improve ocean health across its coastline and exclusive economic zone (EEZ). The delegation is also expected to advance engagement with international partners on mechanisms to scale up sustainable ocean-based industries and deepen regional cooperation frameworks.
The conference programme extends beyond diplomatic exchanges to include investment forums, a BlueTech exhibition, youth leadership tracks and specialised policy clinics designed to drive innovation in climate adaptation and sustainable ocean governance. Organisers expect the gathering to catalyse fresh inflows of public and private capital into marine conservation and sustainable fisheries management.
Nigeria Watch
Nigeria’s participation in the Our Ocean Conference comes at a moment when the country’s blue economy agenda is still more aspiration than architecture. While the Tinubu administration has spoken broadly of harnessing Nigeria’s vast ocean resources — from fisheries and aquaculture to offshore energy and maritime tourism — the policy frameworks and funding mechanisms needed to convert that vision into commercial reality remain largely underdeveloped.
For Nigeria’s port operators, terminal managers and shipping stakeholders, the Mombasa summit carries practical significance beyond the diplomatic optics. International ocean governance commitments increasingly intersect with commercial maritime operations: stricter IUU fishing enforcement, expanded marine protected zones and emerging blue carbon markets all have direct implications for how shipping lanes, offshore logistics corridors and coastal port infrastructure are managed.
Equally notable is the investment dimension. The Our Ocean Conference has historically generated significant financing pledges for ocean-related projects. Nigeria’s ability to attract a share of that capital — particularly for port decarbonisation, offshore wind development and blue infrastructure along the Lagos-Calabar coastal corridor — will depend on whether Abuja can present bankable project pipelines backed by credible regulatory frameworks, rather than broad thematic declarations.
NIMASA’s ongoing efforts to modernise Nigeria’s maritime regulatory environment and the NPA’s port expansion programme are relevant foundations, but without coordinated blue economy legislation and dedicated funding mechanisms, Nigeria risks being a spectator at forums that are reshaping the global maritime investment landscape.
The question Mombasa should sharpen for Nigerian policymakers is straightforward: will the country leave with commitments, or with capital?
Waterways News — Covering Nigeria’s Maritime and Blue Economy Sector
How Liberia Turn Its Flag into a Maritime Goldmine — But the Profits Keep Sailing Away
The world’s largest ship registry sits in a West African nation with a $670 per capita income. The ships are everywhere. The money, largely, is not.
By Oghenewoke Osaweren | Waterways News
In the high-pressure world of global shipping, few decisions carry as much financial weight as where a vessel is registered. And right now, more shipowners are making that decision in favour of Liberia than any other country on earth.
As of June 2026, the Liberia-flagged fleet stood at 307.3 million gross tonnage — making the Liberian International Ship and Corporate Registry (LISCR) the first registry in history to cross the 300 million GT threshold. It is the third consecutive year Liberia has held the title of the world’s largest shipping registry, widening its lead over its nearest rival by nearly 45 million gross tons.
The numbers are staggering. The Liberian Ship Registry now accounts for 17 percent of the global fleet, with 6,092 vessels flying its flag, and it represents 28 percent of global newbuilding gross tonnage — meaning more than one in four new ships entering the global fleet now does so under the Liberian colours.
But what pulls the world’s shipowners to a flag planted in one of West Africa’s most impoverished nations? And, critically, what is Liberia itself getting out of the arrangement?
THE MAGNET: WHAT SHIPOWNERS ARE REALLY BUYING
Established in 1948, the Liberian Registry has built its reputation on maritime safety, environmental standards, and administrative efficiency. Yet the hard commercial draw has always been simpler than that: cost reduction on a massive scale.
Shipowners choose Liberia’s open registry for lower taxes and reduced registration fees that can significantly slash operational costs, alongside the freedom to hire multinational crews at competitive wages — bypassing the higher labour costs imposed by national registries in Europe, Asia, or the Americas.
There are no crew nationality restrictions on Liberian vessels, and taxes are assessed at conservative rates based on net tonnage. For owners managing fleets of dozens of vessels, the cumulative savings run into tens of millions of dollars annually.
The registry is administered from Vienna, Virginia, with offices in New York, Hamburg, Hong Kong, London, Piraeus, Tokyo, Zurich, Singapore, and Monrovia, providing clients with 24-hour service. The bureaucratic friction that delays other registries simply does not exist here — a Liberian ship-owning corporation can typically be formed on the same working day instructions are received.
THE CHINA CARD
Beyond the traditional cost advantages, a newer and increasingly consequential incentive has emerged. Under a renewed maritime agreement with the People’s Republic of China, Liberian-flag vessels now enjoy preferential tonnage dues rates at Chinese ports, alongside expedited customs procedures and simplified port formalities — advantages that competing flags such as the Marshall Islands do not enjoy.
In a global shipping economy where China handles a dominant share of cargo, this diplomatic edge is no small commercial consideration.
LIBERIA’S GAIN — ON PAPER
Proponents of the arrangement argue that Liberia benefits meaningfully from the registry’s prestige and revenue. The Liberia Maritime Authority has described holding the world’s largest registry title as both an honour and a responsibility, with Commissioner Neto Zarzar Lighe Sr. pledging commitment to innovation and best practices expected of a Category ‘A’ member of the International Maritime Organisation’s Council.
The registry is reported to generate approximately 25 percent of Liberia’s national income — a figure that, if accurate, would represent a remarkable dependency on a single offshore arrangement. Liberian-flagged vessels also carry more than one-third of the oil imported into the United States, giving Liberia an invisible but powerful role in American energy supply chains.
THE UNCOMFORTABLE ARITHMETIC
But the glowing statistics mask a deeply troubling reality.
According to the Liberia Revenue Authority’s own records, the country received just US$12 million in maritime revenue in the 2019-2020 tax year from LISCR — amounting to only 2.75 percent of its total domestic revenue. More recent estimates place Liberia’s annual take from the registry at approximately $20 million.
Against a backdrop where Liberia’s total GDP stood at $4.75 billion in 2024, with a per capita income of just $670, the question becomes stark: who is really benefiting from the world’s most powerful shipping flag?
When over 130 countries representing 90 percent of global GDP came together in 2021 to agree a historic minimum corporate tax rate of 15 percent for multinationals, shipping alone was excluded — an arrangement that continues to shield the registry’s clients from the kind of global tax reform that would otherwise erode their savings.
The structural explanation is revealing. LISCR is a purpose-made limited liability company registered in Delaware and based in Virginia, with US nationals as exclusive investors under Liberian law — meaning the entity that manages the world’s largest shipping registry is legally and operationally American, not Liberian.
Even the United States Ambassador to Liberia has publicly acknowledged the gap, stating that “the revenue, jobs, and expertise generated by LISCR have the potential to benefit Liberia’s economy in nearly every sector” — while urging that maritime revenues be transparently incorporated into the national budget. The diplomatic phrasing barely conceals the implicit admission: the potential is there, but the delivery has fallen short.
A FLAG THAT FLIES EVERYWHERE, PROFITS THAT LAND NOWHERE NEAR MONROVIA
Liberian investigative voices have grown increasingly vocal, with local media questioning whether registry revenues are ending up in the pockets of a privileged few, including top officials and their political lawyers, rather than flowing into public coffers.
The ITF has long argued that the FOC system lets foreign shipowners use the Liberian flag to benefit from lax regulations and lower operating expenses, resulting in labour exploitation with little meaningful economic benefit returning to Liberia itself.
The paradox is stark enough to have earned a name in academic and policy circles. The downward drag that tax havens brought to government revenues worldwide was once commonly referred to as the “Liberian Problem.”
THE BIGGER PICTURE FOR AFRICA
For maritime-watchers across West Africa — and in Nigeria, where the inland waterways sector continues to seek investment and regulatory frameworks that actually serve national interests — the Liberian registry story carries a cautionary resonance.
A nation can sit at the centre of global maritime commerce, command the allegiance of 6,000 vessels flying its flag across every ocean, carry a third of America’s oil imports, and still struggle to translate that extraordinary leverage into domestic development. The ships sail. The registry grows. The flag waves on every sea.
The revenue, largely, waves goodbye with them.
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