January 1981	VOLUME 6	NUMBER 1	IJOEDY	(ISSN 0364-9059)

NONTECHNICAL CONTENT
		Front cover and table of contents
		Back cover
PAPERS
Michael W. Evans, Tom M. Georges, and Bob L. Weber		Tracking the velocity and position of offshore vessels and floating objects with HF Doppler transponders		1
Dag T. Gjessing		Adaptive techniques for radar detection and identification of objects in an ocean environment		5
Lawrence J. Rennie		The TAP III beamforming system		18
Michiko Yamashita and Kazuo Taguchi		Phase disturbance of 100-kHz groundwaves by a circular island in the open sea		26