Greece leads global shipping with one of the world’s largest fleets, navigating 2025’s regulatory shifts: EU ETS scope rises to 70% emissions (full by 2026), FuelEU Maritime mandates GHG intensity reductions from January 2025, IMO’s Net-Zero Framework adoption uncertain post-US exit, ESG integration via sustainability-linked loans, New Code of Private Maritime Law modernizing registrations/mortgages, digital nautical register rollout in 2026, myDATA e-transport mandatory December 2025, US fees on Chinese-built vessels impacting 35% of Greek fleet, and Basel IV tightening bank lending.