Accession Number : ADD003175

Title :   Underwater Intrusion Detecting System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Thompson,John H ; Sims,David S

Report Date : 25 Nov 1975

Pagination or Media Count : 5

Abstract : The patent relates to the underwater surveillance of harbor and channel areas and the like, and more particularly to an active catacoustic system for detecting and classifying a body intruding in a volume of water being protected.

Descriptors :   *Swimmers, *Antiintrusion devices, *Patents, Acoustic detectors, Active sonar, Display systems, Echo ranging, Underwater tracking

Subject Categories : Marine Engineering
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE