October 1984	VOLUME 9	NUMBER 4	IJOEDY	(ISSN 0364-9059)

NONTECHNICAL CONTENT
		Front cover and table of contents
		Back cover
PAPERS
Arthur B. Baggeroer		Acoustic telemetry--An overview		229
Arthur B. Baggeroer		Scanning the issue		236
Theodore G. Birdsall		Acoustic telemetry for ocean acoustic tomography		237
Josko Catipovic, Arthur B. Baggeroer, Keith Von Der Heydt, and Donald Koelsch		Design and performance analysis of a Digital Acoustic Telemetry System for the short range underwater channel		242
Francis C. Jarvis		Description of a secure reliable acoustic system for use in offshore oil Blowout Preventer (BOP) or wellhead control		253
Michael P. Shevenell and Alden L. Winn		Acoustic transmission of images using a microprocessor-based video bandwidth reduction technique		259
Robert O. Harger		A fundamental model and efficient inference for SAR ocean imagery		266
Philippe de Heering		Alternate schemes in synthetic aperture sonar processing		277
LETTERS
M. S. Scivier		Comments on "A sea surface height estimator using synthetic aperture radar complex imagery"		281
Robert O. Harger		Reply to "Comments on 'A sea surface height estimator using synthetic aperture radar complex imagery'"		282
BOOK REVIEWS
Michael J. Buckingham		Acoustic waveguides, applications to oceanic science		284