The present report describes the full scale measurements at the Zeebrugge breakwater within the framework of Workpackage 3: Full Scale Measurements of the CLASH-project. First a general description of the field site is given. Afterwards, two types of full scale measurements are described: on the one hand the wave overtopping measurements and on the other hand the measurements to identify hazards resulting from wave overtopping. Finally, results obtained until now (September 2003) are presented.