ACCRA/LOMÉ — For nearly a decade, an invisible line beneath the Atlantic Ocean has separated more than just two neighboring countries.

It has separated communities from certainty, investors from opportunity, and two West African nations from the full potential of their shared maritime heritage. Now, with Ghana’s decision to refer the long-standing dispute to international arbitration, that line is about to be drawn—and billions of dollars hang in the balance.

The Ghana-Togo maritime boundary dispute, formally submitted to arbitration under the United Nations Convention on the Law of the Sea (UNCLOS) in February 2026, represents far more than a technical legal disagreement. At its core lies a competition for resources that could transform national economies, reshape regional energy security, and determine the future of the Gulf of Guinea as a hydrocarbon province.

Ghana Heads to International Arbitration Over Maritime Boundary Dispute With Togo

The $100 Million Question

The disputed waters sit within a sedimentary basin believed to hold significant offshore oil and gas reserves—resources that could generate substantial revenues for whichever nation secures sovereignty. Industry experts estimate the potential value of hydrocarbon deposits in the contested zone at sums that could reach into the billions, making the $100 million figure a conservative baseline for what’s ultimately at stake.

“The disputed area lies within a basin known for significant hydrocarbon potential, and both governments see offshore oil and gas as central to economic planning, debt sustainability, and political narratives of development,” notes an analysis from Africa Eye, a regional policy publication.

For Ghana, which has already developed world-class fields like Jubilee and TEN, securing legal certainty over adjacent waters is essential for attracting continued investment in exploration and production. For Togo, which has yet to make a major offshore discovery, the stakes are existential—a favorable ruling could unlock resources that would fundamentally alter the country’s economic trajectory.

The Keta Basin, a sedimentary region extending from southeastern Ghana into the Republic of Togo, has long been identified as a site of untapped hydrocarbon potential. Early geological surveys suggested the presence of oil and gas, but exploration has stalled due to the unresolved boundary and insufficient investment.

A Decade of Failed Negotiations

The dispute’s origins trace to specific flashpoints. In December 2017 and May 2018, Togolese authorities halted two Ghanaian seismic survey vessels conducting deep-sea data acquisition in an area near the border that Ghana considered part of its offshore maritime zone . Togo claimed the vessels were operating in waters within its own claimed area, marking the first significant confrontations in the disagreement.

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These incidents occurred shortly after Ghana won its landmark maritime boundary case against Côte d’Ivoire in September 2017 at the International Tribunal for the Law of the Sea (ITLOS)—a ruling that provided binding delimitation on Ghana’s western frontier and demonstrated the effectiveness of international adjudication.

Following the 2017-2018 incidents, both countries established a Joint Maritime Boundary Technical Committee comprising technical experts from both sides. They held multiple rounds of discussions, but fundamental differences persisted over delimitation methodology, baseline coordinates, and interpretation of nautical charts. Togo also raised concerns about the presence of Ghanaian naval vessels in contested waters during negotiations.

In 2021, Ghana proposed a formal demarcation line, but Togo rejected it. After eight years of bilateral negotiations without achieving a settlement, Ghana notified Togo in February 2026 of its decision to pursue international arbitration.

The Legal Framework: UNCLOS as Final Arbiter

The arbitration will proceed under UNCLOS, the international treaty that provides the legal framework for maritime boundaries and dispute settlement mechanisms. Ghana’s decision to invoke Annex VII arbitration follows the same legal pathway that proved successful in the Côte d’Ivoire case.

Key provisions guiding the tribunal include:

• Article 15, concerning delimitation of the territorial sea between states with opposite or adjacent coasts
• Articles 74 and 83, requiring states with overlapping exclusive economic zones (EEZs) and continental shelf claims to achieve an equitable solution through agreement, taking into account relevant circumstances

The core legal question revolves around methodology: Should the boundary follow a simple equidistance line (the median line between the two coasts), or should it account for broader geographical and historical factors? Ghana’s successful 2017 case against Côte d’Ivoire saw the ITLOS Special Chamber adopt the equidistance method, a precedent that likely influences Accra’s confidence in the current proceedings.

Togo, for its part, has responded with measured dignity. In a communiqué following Ghana’s notification, the Togolese government reaffirmed its “commitment to resolving maritime disputes in accordance with the principles of justice and equity” while stating that any resolution must respect the sovereign rights of both nations.

Beyond Hydrocarbons: Fisheries, Communities, and the Blue Economy

While oil and gas capture headlines, the dispute’s resolution will affect far more than energy companies. The contested waters sustain fishing communities on both sides of the border—communities already pressured by industrial fleets and illegal, unreported, and unregulated fishing.

Coastal communities near the Keta Basin have long histories of fishing, spiritual practices, and artisanal livelihoods linked to the ocean. Exclusion from decision-making not only threatens legitimacy but undermines peace. Any future subsea infrastructure—from pipelines to telecommunications cables—will depend on where the boundary ultimately runs.

The arbitration also aligns with Ghana’s Blue Economy strategy, which emphasizes the sustainable exploitation of ocean resources, including fisheries, hydrocarbons, and shipping lanes. Clear boundary delimitation provides legal certainty for investors, enhances resource management, reduces conflict risk, and supports long-term national development planning.

Regional Implications: A Test for West African Governance

Ghana’s decision to escalate the dispute to arbitration arrives at a delicate moment for regional diplomacy. The Economic Community of West African States (ECOWAS) was designed to help member states manage tensions before they harden into crises, yet institutional strains and political turbulence in recent years have limited its capacity to sustain sensitive negotiations.

In that context, Ghana’s appeal to a global legal mechanism signals a preference for rules-based adjudication over prolonged regional bargaining—a move that may quietly reshape expectations across West Africa, where other coastal states face overlapping maritime claims of their own.

The outcome will matter well beyond Accra and Lomé. A clear, mutually respected decision could strengthen the case for managing offshore competition through law rather than brinkmanship, while a politicized process could unsettle investment and deepen mistrust at sea.

Both nations remain publicly committed to preserving their relationship throughout the legal process. Ghana’s government stated that it took the step “to avoid an escalation of incidents that have created tensions between some of our institutions and to promote an amicable resolution, thereby contributing to the continued good relations between our two countries” .

Togo similarly stated its dedication to the spirit of good neighborliness, asserting that it remains open to a resolution that respects international law while preserving the fraternal relations between the two states.

The Road Ahead

The arbitration process will require both nations to submit extensive legal, technical, and historical evidence, including hydrographic surveys, historical documentation, and expert analyses. The proceedings could take several years before a final award is delivered.

For Ghana, confidence in legal recourse is rooted in experience. The 2017 case against Côte d’Ivoire showed that structured proceedings and provisional measures can prevent technical disagreements from escalating into security incidents, reinforcing the idea that consistent cartography and historical practice can translate into legal advantage.

For Togo, arbitration offers clarity but also uncertainty. Any ruling will redefine exploration rights, revenue expectations, and maritime enforcement responsibilities—outcomes that will shape the country’s economic future for generations.

As the International Tribunal for the Law of the Sea prepares to receive submissions from both nations, one truth remains clear: beneath the waves of the Gulf of Guinea lies not just oil and gas, but the hopes of millions whose lives depend on what happens when two neighbors ask international law to draw a line in the sea.