July 1998 VOLUME 23 NUMBER 3 IJOEDY(ISSN 0364-9059)

NONTECHNICAL CONTENT
Front cover and table of contents
Back cover

PAPERS
Jorge C. Novarini and Jerald W. Caruthers A simplified approach to backscattering from a rough seafloor with sediment inhomogeneities 157
Michael J. Wilmut, John M. Ozard, Kyle O'Keefe, and Martin Musil A piecewise matched-field tracking algorithm 167
Subramanian D. Rajan, James A. Doutt, and WIlliam M. Carey Inversion for the compressional wave speed profile of the bottom from synthetic aperture experiments conducted in the Hudson Canyon area 174
D. P. Knobles, Evan K. Westwood, and Julienne E. LeMond Modal time-series structure in a shallow-water environment 188
Steve Stanic, Ralph R. Goodman, Kevin B. Briggs, Nicholas P. Chotiros, and Edgar T. Kennedy Shallow-water bottom reverberation measurements 203
Svein Vagle and David M. Farmer A comparison of four methods for bubble size and void fraction measurements 211
Karsten Heia and Torbjørn Eltoft A minimum variance unbiased estimator for ocean surface currents based on multifrequency microwave radar observations 223
Renbiao Wu and Jian Li Time-delay estimation via optimizing highly oscillatory cost functions 235
Sylvie Daniel, Fabrice Le Léannec, Christian Roux, Bassel Solaiman, and Eric P. Maillard Side-scan sonar image matching 245
Matthew W. Dunnigan and George T. Russell Evaluation and reduction of the dynamic coupling between a manipulator and an underwater vehicle 260
P. Edgar An and Samuel M. Smith An experimental self-motion study of the ocean explorer AUV in controlled sea states 274
Karen A. Harper, Matthew D. Berkemeier, and Sheryl Grace Modeling the dynamics of spring-driven oscillating-foil propulsion 285

TECHNICAL COMMUNICATIONS
William M. Carey Sonar array characterization, experimental results 297