Abstract : The report describes the development of a mobile experimental facility for making observations of RCS matrix properties of sea clutter and of targets in sea clutter. The equipment is mounted in a van which was towed to a site on Pt. Loma at the NOSC facility in San Diego. Preliminary measurements on clutter and targets of opportunity were taken and analyzed. The analysis confirms the salient features of sea clutter properties deduced from the NRL four Frequency Radar data collected some ten years ago. Experimental results also show that RCS matrix data is used in target signatures which should eventually lead to the development of an effective technique for target classification.