April 1991	VOLUME 16	NUMBER 2	IJOEDY	(ISSN 0364-9059)

NONTECHNICAL CONTENT
		Front cover and table of contents
		Back cover
PAPERS
Rafaat H. Khan		Ocean-clutter model for high-frequency radar		181
Brian H. Maranda and John A. Fawcett		Detection and localization of weak targets by space-time integration		189
Gerald L. D'Spain, William S. Hodgkiss, and Gregory L. Edmonds		The simultaneous measurement of infrasonic acoustic particle velocity and acoustic pressure in the ocean by freely drifting Swallow floats		195
Dale D. Ellis		Effective vertical beam patterns for ocean acoustic reverberation calculations		208
Russell E. Trahan Jr., D. Steven Yeadon, and Maurice G. Thiele Jr.		Towfish altitude computation using multipath acoustic ranging		212
Russell E. Trahan Jr., D. Steven Yeadon, and Maurice G. Thiele Jr.		Optimal estimation of layback distance for marine towed cables		217
COMMUNICATIONS
M. H. Er		Equivalence of MMSE and CCMP methods for broadband and robust array design		223