July 1978	VOLUME 3	NUMBER 3	IJOEDY	(ISSN 0364-9059)

NONTECHNICAL CONTENT
		Front cover and table of contents
		Back cover
PAPERS
William L. Konrad and Mark B. Moffett		Parametric acoustic source beamwidth control		57
Ulrich Petersohn and Peter Diekmann		An adaptable radio-controlled measuring system for oceanographic research in shallow water		60
COMMUNICATIONS
G. Clifford Carter		A brief description of the fundamental difficulties in passive ranging		65
Omer E. Lamborn		Underwater electrical terminations		67
Kiyo Tomiyasu		Central swath mapping by a future satellite-borne fan-beam microwave scatterometer for inferring global ocean wind fields		70
Donald L. Baker and D. Scott Fenstermacher		A hydrocast bottom-finding switch with audible alarm		72