Accession Number : ADD015094

Title :   Air-Deliverable, Ice-Penetrating Sonobuoy.

Descriptive Note : Patent, Filed 5 Feb 74, patented 7 May 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Feltz, Louis V ; Reece, Eric W ; Young, Clarence W ; Lewis, Thigpen

Report Date : 07 May 1991

Pagination or Media Count : 4

Abstract : An air-deliverable, ice-penetrating sonobuoy vehicle has three-parts-a penetrator, instrument compartment, and antenna sphere. The parts are connected by frangible couplings which allow separation of the parts upon impact with the surface. The penetrator has a biconic nose-tip which forms a cavity in the ice, having a diameter only slightly larger than the diameter of the penetrator. When the larger diameter instrument compartment contacts the surface, frontal loadings will never a frangible joint and thereby separate the penetrator from the instrument compartment. The antenna sphere, which has an even larger diameter, will separate from the instrument compartment in a like manner, except for an electrical connection. The antenna sphere has an eccentric ballast and will remain on the surface, transmitting signals from a hydrophone which is automatically released from the instrument compartment. The sonobuoy can also be used in open water.

Descriptors :   ANTENNAS, BALLAST, COMPARTMENTS, COUPLINGS, ECCENTRICITY, FRANGIBLE, HYDROPHONES, ICE, INSTRUMENTATION, OPEN WATER, PARTS, SEPARATION, SIGNALS, SONOBUOYS, SPHERES, TRANSMITTING

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE