In a closed-door session, a U.S. negotiator warned other nations that attempts to curb climate pollution from ships have “no prospect” of success. The statement signals a significant hurdle for global carbon-tax proposals targeting maritime transport. The discussion took place amid growing international pressure to address shipping’s share of global emissions, but the negotiator’s remarks suggest limited progress on a unified regulatory framework. No quantitative data were disclosed in the brief meeting, and the negotiator did not provide specific metrics or timelines for potential policy shifts. While the negotiator’s comments were brief, they underscored the prevailing uncertainty, noting that the prospects for a global carbon tax on shipping remain “no prospect” of success. The remark was repeated in subsequent briefings, reinforcing the stance that a coordinated approach is unlikely in the near term. Nevertheless, industry stakeholders may pivot to alternative strategies, such as technology upgrades and regional agreements, to mitigate emissions while awaiting a broader consensus on carbon-pricing mechanisms.