Air-Deliverable, Ice-Penetrating Sonobuoy.
Patent, Filed 5 Feb 74, patented 7 May 91,
DEPARTMENT OF THE NAVY WASHINGTON DC
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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.
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