April 1993	VOLUME 18	NUMBER 2	IJOEDY	(ISSN 0364-9059)

NONTECHNICAL CONTENT
		Front cover and table of contents
		Back cover
PAPERS
Dimitri Alexandrou and Dimitris Pantzartzis		A methodology for acoustic seafloor classification		81
Timothy F. Duda		Analysis of finite-duration wide-band frequency sweep signals for ocean tomography		87
Steve Stanic and Edgar G. Kennedy		Reverberation fluctuations from a smooth seafloor		95
Jerald W. Caruthers and Jorge C. Novarini		Modeling bistatic bottom scattering strength including a forward scatter lobe		100
Pierre Cervenka and Christian de Moustier		Sidescan sonar image processing techniques		108
Chris Carey-Smith		The practical implementation of electronic stabilization for sector scanning sonar displays		123
Anthony J. Weiss and Benjamin Friedlander		Range and bearing estimation using polynomial rooting		130
Anders Holtsberg and Jan H. Holst		A nearly unbiased inherently stable bearings-only tracker		138
Ferial El-Hawary and G. A. N. Mbamalu		Fair and Andrews's weighting-based IRWLS algorithms for time-delay estimation in underwater target tracking		142