April 1979	VOLUME 4	NUMBER 2	IJOEDY	(ISSN 0364-9059)

NONTECHNICAL CONTENT
		Front cover and table of contents
		Back cover
EDITORIAL
David E. Weissman		Editorial		37
Donald M. Bolle		Closing editorial		38
PAPERS
J. H. van Oorschot and W. Wijmans		An information system on environmental conditions for the construction and operation of a storm-surge barrier		40
Richard R. Ramseyer and Salvatore D. Morgera		A distributed microprocessor architecture for fixed and mobile acoustic array adaptive beam forming		46
Gervasio Prado		Optimal estimation of ship's attitudes and attitude rates		52
COMMUNICATIONS
Henry E. Lee		Extension of synthetic aperture radar (SAR) technique to undersea applications		60
Frederick H. Fisher and E. D. Squier		Laser sand detector		63