Extending previously reported work [B. G. Hurdle, R. H. Ferris, and K. D. Flowers, “Effect of Transducer Velocity on the Structure of Signals Scattered from the Ocean Bottom,” J. Acoust. Soc. Am.36, 1936–1942 (1964)], a method for describing the fine structure of acoustic fields scattered from the ocean bottom is presented. The fluctuating characteristic of scattered signals is shown to be the result of intercepting the lobes of the interference field when the source and or receiver are in motion. Lobe or interference widths computed from measured data are independent of speed and in good agreement with a simple physical model. Lobe widths also appear to be independent of bottom roughness. A similarity exists between acoustical scattering and optical scattering employing a monochromatic (laser) source.