Accession Number : ADD014627

Title :   Sonar System.

Descriptive Note : Patent, Filed 8 Dec 66, patented 3 Jul 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Murphree, Francis J ; Warner, Henry L ; McLeroy, Edward G

Report Date : 03 Jul 1990

Pagination or Media Count : 9

Abstract : A sonar system having a sonar transmitter which is programmed to broadcast two sets of several increasing frequency signals, with the frequency gap between each set thereof sufficient to cause them to distinguish between deep and shallow water targets, respectively. A heterodyne receiver receives target echoes of said sets of several frequency signals and converts them to two sets of identical frequency signals which are then readout as a single continuous target display signal. Patents. (RRH)

Descriptors :   *PATENTS, *SONAR RECEIVERS, *SONAR SIGNALS, HETERODYNING, TARGET ECHOES, DISPLAY SYSTEMS, SONAR PROJECTORS, DEEP WATER, SHALLOW WATER, FREQUENCY SHIFT

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE