July 1981	VOLUME 6	NUMBER 3	IJOEDY	(ISSN 0364-9059)

NONTECHNICAL CONTENT
		Front cover and table of contents
		Back cover
PAPERS
Roman E. Glazman		Radio interferential measurements of sea level oscillations with large tidal amplitude		73
Jeffrey Ketchman		Vibration induced in towed linear underwater array cables		77
Michael G. Mattie, S. Vincent Hsiao, and Daniel D. Evans		Wave direction measured by four different systems		87
A. David Dunsiger, Norman A. Cochrane, and W. J. Vetter		Seabed characterization from broad-band acoustic echosounding with scattering models		94
COMMUNICATIONS
William C. Acker and Alan R. Wirtz		A versatile sonar system for ocean research and fisheries applications		107