Patent ID: 8444345
Filing Date: 2013-05-21
Classification: B63B,B63C

Abstract:
1. A floatation collar for an undersea acoustic receiver comprising a two-piece synthetic polymer buoyant shell comprising a first half shell and a second half shell wherein each of said first half and said second half shells are filled with syntactic foam having a specific formulation for desired buoyancy and pressure resistance at a predetermined depth within a water column and further wherein each of the first half and second half shells include a half-receiving chamber so that when the first half and the second half shells are joined by joining means a receiving chamber is formed inside of the floatation collar for receiving a sensor package; and wherein, each of the first half shell and the second half shell comprise a top portion having at least four inwardly sloping flat faces a middle portion having at least four vertical flat faces and a bottom portion having at least four inwardly sloping flat faces for sonar detection and so that when the first half shell and the second half shell are joined the floatation collar has a square or hexagonal shape to facilitate both detection by sonar when deployed in the water and a compact and stable packing of a plurality of receivers while being transported on a deck of a boat.