Radar imagery of ocean surface patterns is presented and discussed. The imaging radar detects changes in ocean surface backscatter and yields imagery of deepwater gravity waves, oil slicks, island shadows, internal waves, coastal waves, and other features. The results of several observations suggest that the surface irregularities behave as iostropic scatterers for a radar wavelength of 25 cm. The popular scattering models are considered in relation to this behavior. The variable incident angle and high resolution of the imaging radar allow one to study the scattering properties of particular surface phenomena.