The HydroFix(TM) Hydrostatic Release Unit (HRU) is a patented rod system that allows a beacon to be quickly and reliably released from a Category I bracket when submerged in water between 1.5-4 meters (4.9'-13.1'). This unit is designed to work with the Sea Shelter(TM), Sea Shelter(TM)2, Sea Shelter(TM)3, and Sea Shelter(TM)4 beacon brackets.