July 1996 VOLUME 21 NUMBER 3 IJOEDY(ISSN 0364-9059)

NONTECHNICAL CONTENT
Front cover and table of contents
Back cover

PAPERS
William J. Zehner and R. Lee Thompson Methods of estimating allowable motion perturbations in side-scan sonar systems 245
Pan-Tai Liu, Fu Li, and Heng Xiao A state decoupling approach to estimate unobservable tracking systems 256
Mark L. Grabb, Shuozhong Wang, and Theodore G. Birdsall Deterministic three-dimensional analysis of long-range sound propagation through internal-wave fields 260
James V. Candy and Edmund J. Sullivan Model-based identification: An adaptive approach to ocean-acoustic processing 273
Len Zedel, Alex E. Hay, Ramon Cabrera, and Atle Lohrmann Performance of a single-beam pulse-to-pulse coherent Doppler profiler 290

TECHNICAL COMMUNICATIONS
Svein Vagle, Kenneth G. Foote, Mark V. Trevorrow, and David M. Farmer A technique for calibration of monostatic echosounder systems 298
David G. Hazen and A. J. Bowen UDATS-II: data acquisition in a client-server environment 305