The 7th issue of the bulletin is dedicated to the fiftieth anniversary of the establishment of the Intergovernmental Oceanographic Commission - UNESCO. It contains IOC timeline, milestones, major achievements and future challenges. A message from the Assistant Director- General and Executive Secretary of the Intergovernmental Oceanographic Commission (IOC) of UNESCO and a Message to the Peoples and Nations of the World On Behalf of the Ocean are published in Bulgarian language.