Accession Number : AD0807724

Title :   PASSIVE LOW FREQUENCY SIMPLE DIRECTIONAL SONOBUOY.

Descriptive Note : Final rept.,

Corporate Author : NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AERO-ELECTRONIC TECHNOLOGY DEPT

Personal Author(s) : Buck, F. E.

Report Date : 16 DEC 1966

Pagination or Media Count : 120

Abstract : An investigation of the feasibility of developing an A size, passive directional sonobuoy to give bearing indications on low-frequency sounds was made. Sonobuoy components and over-the-side breadboard proving models were developed and tested. Tests were conducted on a variety of motor drives. Sonobuoy tests were conducted in calm and rough water. The investigation demonstrated the feasibility of developing an A size, passive, directional sonobuoy using either a rotating 2-ft line hydrophone with a resonant frequency of 7000 Hz, or a rotating 4-ft line hydrophone with a resonant frequency of 3500 Hz. (Author)

Descriptors :   (*SONOBUOYS, FEASIBILITY STUDIES), PASSIVE SYSTEMS, LOW FREQUENCY, DRIVES, HYDROPHONES, ROTATION, VERY LOW FREQUENCY, UNDERWATER TRACKING, ELECTRIC MOTORS, RESONANT FREQUENCY, TORQUE.

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE