Mark your calendars for the 4th edition of the EMODnet Open Sea Lab (OSL) Hackathon, happening online from 25 to 27 March 2025. The hackathon builds on the last 3 successful editions, with one key difference: In addition to using EMODnet services, participants will be given unparalleled access to the EMODnet and Copernicus Marine Service offer via the European Digital Twin Ocean infrastructure (EDITO). This is a very exciting time for marine digital services, and we invite all interested stakeholders, from data scientists to IT specialists and from policy makers to researchers and the private sector to join EMODnet in this unique hackathon - Stay tuned for more details, coming soon!