70647 ⎘
Buoys anchoring arrangements Fixations or other having means to release or urge to the surface a buoy on submergence thereof, e.g. to mark location of a sunken object Water soluble or water weakened means, i.e. buoy released by buoy-to-object securing means being destroyed on contact with water
DOWNHOLE ROBOTS WITH DISSOLVABLE FAIL-SAFE BALLAST
#2Water activated buoyancy device
#3Submerged Fishing Rod Location Detection Device & Retrieval Instrument
#4Devices and methods for recovering articles inadvertently submerged in a body of water
#5Inflatable buoyancy device with water-dependant triggering mechanism