A geopolitical dispute over the Panama Canal has spilled into the shipping lanes, and the ripple effects are being felt across global supply chains. Over the past several weeks, China has dramatically increased its detention of Panama-flagged vessels at Chinese ports. U.S. officials are calling it economic retaliation dressed up as maritime enforcement.
How We Got Here
The story begins in January of this year, when Panama’s Supreme Court ruled that the 1997 concession granting Hong Kong-based CK Hutchison Holdings the right to operate the Balboa and Cristóbal port terminals was unconstitutional. Those two terminals sit at the Pacific and Atlantic entrances to the Panama Canal. The ruling voided a 2021 contract extension and effectively forced Hutchison out. Panama’s government named APM Terminals, a subsidiary of Danish shipping giant A.P. Moller-Maersk, as temporary administrator while a new contract is awarded.
The decision was seen as a significant blow to Chinese commercial interests in Latin America and a win for Washington, which had long viewed Hutchison’s canal-adjacent operations as a national security concern. It also complicated a separate deal in which Hutchison had agreed to sell dozens of its global port assets, including the Panama terminals, to a U.S. consortium led by BlackRock and Mediterranean Shipping Company for nearly $23 billion. That transaction remains stalled.
The Detention Surge
Within weeks of the Panamanian court ruling, a troubling pattern emerged at Chinese ports: Panama-flagged vessels were being pulled aside for safety inspections at a dramatically elevated rate.
The numbers tell the story. In January, 23 out of 72 ships detained in China flew the Panamanian flag, about 32%. By February, that had risen to roughly 42%. In March, it surged to 93 out of 125 vessels detained, nearly 75% flying the Panamanian flag. According to a Lloyd’s List Intelligence report, the total reached nearly 70 Panama-flagged vessels detained since March 8 alone.
Ships were typically held between one and ten days before being released. Short enough to avoid triggering a major international incident, but long enough to cause real disruption to cargo schedules and delivery commitments.
Washington’s Response
The U.S. Federal Maritime Commission was the first to formally raise the alarm. FMC Chair Laura DiBella stated that the detentions were far exceeding historical norms and that the agency was not aware of any other country in recent history conducting vessel safety inspections in what appeared to be a punitive manner. She noted that the intensified inspections appeared to be carried out under informal directives, suggesting these were not routine regulatory actions.
Last week, Secretary of State Marco Rubio went further, publicly accusing China of bullying. Rubio said China’s actions raise serious concerns about the use of economic tools to undermine the rule of law in Panama, a sovereign nation and vital partner for global commerce. He declared that the United States stands firmly with Panama and signaled expanded economic and security cooperation ahead.
The FMC underscored the stakes for American businesses: Panama-flagged ships carry a significant share of U.S. containerized trade, meaning prolonged disruptions translate directly into higher costs and logistical headaches for importers and exporters.
China Pushes Back
Beijing has rejected the accusations. China’s Foreign Ministry called the allegations groundless, and the Chinese embassy in Washington accused the United States of using the issue to advance its own agenda regarding the canal, without addressing the specific spike in detentions.
Panama’s government has tried to keep the temperature down. Officials have suggested the detentions may reflect routine maritime enforcement rather than deliberate retaliation, and have stopped short of linking the surge directly to the port dispute. U.S. officials, however, have continued to treat the situation as a threat to international trade stability.
Why the Panama Flag Matters
Panama operates the world’s largest ship registry. A huge number of vessels calling on U.S. ports fly the Panamanian flag, making it one of the most commercially significant flags of convenience in global shipping. If China continues or escalates targeted inspections of Panama-registered ships, the consequences extend well beyond Panama itself.
One industry analyst put it plainly: if the world’s largest exporter makes the Panamanian flag a liability, operators will look for alternatives, adding cost, complexity, and uncertainty to an already strained global shipping environment.
What This Means for Your Shipments
For businesses shipping goods to or from China, or routing cargo on vessels flying the Panamanian flag, this situation is worth watching closely.
Schedule reliability may be affected if vessels are detained for inspections, even briefly, so building buffer time into delivery expectations is wise. Freight costs could rise if the situation escalates, carriers reroute vessels, or flag changes add administrative burden. And for those moving goods through China specifically, this is one more layer of uncertainty stacked on top of existing tariff and compliance pressures.
The situation is moving quickly. What looks like a short-term enforcement spike could deepen depending on how the broader U.S.-China standoff over the canal develops.
The Bigger Picture
The Panama Canal handles roughly 5% of global trade and has been a flashpoint in U.S.-China competition since President Trump began publicly questioning Chinese influence over the waterway during his 2024 campaign. The U.S. formally handed control of the canal to Panama on December 31, 1999, but it has never stopped being a strategic priority for Washington or a target of Chinese commercial interest.
What’s unfolding now is a clear example of how geopolitical rivalry gets translated into supply chain disruption. The weapons of choice aren’t tariffs or sanctions. They’re port inspectors with the authority to hold a ship for a week.