Under-Ice Surveillance Buoy
Patent, filed 1 Aug 1990, patented 17 Oct 2000
NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
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An air-launched sonobuoy, particularly useful for under-ice surveillance, carries a descent-retardation parachute whose lanyards activate a surface float during descent. Upon impact into an ice region, a slip-rod is jarred loose from the cannister top thus freeing the surface float, and its RF antenna, to remain above the ice while the remainder of the components deploy.
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