The Conclude of the Open Ocean: Is Maritime Trade Entering a New Era of Geopolitical Leverage?
For decades, the global economy operated on a silent agreement: the oceans were open, and the rules of navigation were universal. This rules-based order allowed global trade to balloon from about $60bn in the 1950s to more than $25 trillion last year
, according to the World Trade Organization.
But that era of predictability is fracturing. We are witnessing a shift where the sea is no longer just a highway for commerce, but a tool for political coercion. From the Strait of Hormuz to the Panama Canal, the “freedom of navigation” is being replaced by a system of leverage, permission, and strategic pressure.
From Rules to Leverage: The Rise of ‘Permission-Based’ Transit
The most concerning trend is the move toward permissioning
—where nations treat international waterways not as common goods, but as sovereign assets to be monetized or weaponized. This was highlighted when Indonesia’s Finance Minister Purbaya Yudhi Sadewa suggested charging tolls for vessels passing through the Strait of Malacca, an idea inspired by Iranian tactics in the Strait of Hormuz.
While such suggestions are often walked back, they signal a psychological shift. In the Strait of Hormuz, we have already seen this play out through naval blockades and the capture of ships. As Jack Kennedy, head of MENA Country Risk at S&P Global Market Intelligence, notes, the danger isn’t always a total shutdown, but a calibrated employ of force
designed to signal control.
“The risk is the precedent that could be set once multiple states test boundaries – through de facto permissioning, selective enforcement, or threatening tolls or levies in international straits. Then outcomes turn into more contingent on bargaining, and power.” Jack Kennedy, S&P Global Market Intelligence
The Weaponization of Flags and Ports
The geopolitical struggle is also moving into the administrative layer of shipping. The recent friction surrounding Panama-flagged vessels demonstrates how “flags of convenience” are becoming targets. The US and several Caribbean and South American nations recently accused China of targeted economic pressure
by detaining Panama-flagged ships in its ports.
This tension is further complicated by the struggle for infrastructure control. The decision by Panama’s Supreme Court to scrap a longstanding concession held by a Hong Kong-linked company to operate the Balboa and Cristobal ports underscores how port ownership is now a frontline in the US-China rivalry.
The Financial Fallout: Insurance, Rerouting, and Risk
The politicization of the seas is not just a diplomatic issue; It’s a balance-sheet crisis for shipping companies. When a route becomes “politicized,” the cost of doing business spikes instantly.
- Insurance Premiums: War-risk prices surge when regions like the Red Sea or the Black Sea become conflict zones.
- Operational Costs: Rerouting vessels—such as avoiding the Red Sea by sailing around the Cape of Good Hope—requires significantly more fuel and longer transit times.
- Cascading Delays: Even a short “administrative” detention of a ship can trigger a domino effect of missed cargo commitments and schedule collapses.
The New Scale of Maritime Disruption
Maritime pressure is not a new phenomenon, but the stakes have changed. Jean-Paul Rodrigue, a professor at Texas A&M University, argues that while using naval power to pressure an enemy’s economy is an old tactic, what has changed is the scale, the volume of containers, the size of the global fleet
.
We are seeing a convergence of state-sponsored pressure and non-state volatility. While Russia uses the Black Sea to exert economic pressure on Ukrainian exports, non-state actors like the Houthis are forcing a redraw of global shipping maps. Simultaneously, the International Maritime Bureau reported that 2025 saw the highest level of piracy incidents in the last five years, proving that as state-led rules weaken, opportunistic crime thrives.
For more on how these shifts affect global trade, explore our guide on Supply Chain Resilience in Volatile Markets or visit the UNCTAD portal for the latest seaborne trade statistics.
Frequently Asked Questions
How does the “politicization” of shipping affect the average consumer?
When ships are rerouted or insurance costs rise, shipping companies pass those costs to the importers, who then raise prices for the end consumer. This contributes to global inflation, particularly for energy and food.
What is “permissioning” in maritime terms?
Permissioning occurs when a coastal state demands that ships seek explicit approval or pay a fee to pass through international straits that were previously open under the “freedom of navigation” principle.
Why are Panama-flagged ships specifically targeted?
Panama is one of the world’s largest ship registries. By targeting vessels under this flag, nations can exert pressure on the Panamanian government or use it as a proxy to signal displeasure to the US or China, depending on the political alignment.
Join the Conversation
Do you consider the era of free navigation is over, or will international treaties eventually restore order to the oceans?
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