A BENCH MARK NAVIGATION SYSTEM FOR SURFACE AND SUBSURFACE VESSELS

Gilbert Fain

Peer Reviewed

Abstract:	A BENCH MARK NAVIGATIOhT SYSTEM composed of a single bottom-mounted beacon and a receiver using a single hydrophone is described. The system will provide range and relative bearing of the vessel with respect to the bottom-mounted unit. The bottom-mounted unit is standard; however, the shipboard unit utilizes a multimode transducer. Range is determined by one-way timing and bearing is determined by using the unique properties of the multi-mode transducer. This device, a proprietary item of Raytheon Company, is a Cylindrical, ceramic, pieeoelectric element. Electrodes are placed at 90-degree intervals on the cylinder, and the four signals made available can be combined to generate two quadrature dipole patterns and an omni pattern. These signals are sufficient to determine relative bearing. A prototype system has been designed. Besides the necessary reamplifiers, filters and summing circuits, a digital, an analog, and a hybrid display are being developed. Sources of error in the general system and system accuracies are descrived.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 16, Number 1
Pages:	44 - 51
Cite this article:	Fain, Gilbert, "A BENCH MARK NAVIGATION SYSTEM FOR SURFACE AND SUBSURFACE VESSELS", NAVIGATION: Journal of The Institute of Navigation, Vol. 16, No. 1, Spring 1969, pp. 44-51.
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