The goal of the experiment is to image a 2D pattern of the slender stainless steel and Garolite vertical rods Using Circular – Synthetic Aperture Sonar. A second goal is to measure differences in the imaging of the two materials. The imaging algorithm involves back-projection in a geometry of the stationary transmitter/ receiving transducer, but a target platform that can rotate at 2-degree increments or even less for fine scale work. The imaging program is Mathematica-based. Experiments will include different target configurations, target materials, and a study of the resolution of the experiment apparatus by data runs using just two targets with different spacing.