The Permanent Court of Arbitration (PCA) has published its contribution to the 2025 report of the UN Secretary-General on oceans and the law of the sea. The document highlights the PCA's recent initiatives and ongoing work in maritime dispute resolution, as well as related outreach activities and educational initiatives through conferences and lectures over the past year. The report provides updates on two ongoing Ukraine-Russia arbitrations under the UN Convention on the Law of the Sea (UNCLOS): the Dispute Concerning Coastal State Rights in the Black Sea, Sea of Azov, and Kerch Strait, Case No 2017-06, instituted in September 2016, and the Dispute Concerning the Detention of Ukrainian Naval Vessels and Servicemen, Case No 2019-28, instituted in April 2019, where Russia suspended participation following disputed arbitrator appointments. The PCA also reports signing new Host Country Agreements with Brazil and Ecuador, and the addition of Vanuatu, Timor-Leste and Armenia as member states. The PCA is currently administering 215 cases, including seven inter-state arbitrations.