The G-5 Hydrostat ia an automatic release device for use with Liferafts, EPIRBs and other equipment.

The Hydrostatic Release Unit G-5 is widely used for Emergency Position Indicating Radio Beacons (EPIRB). Should the vessel sink, the G-5, which is activated by increasing water pressure, will automatically release the EPIRB. On reaching the surface the EPIRB starts to emit a signal of identification and position to a satellite. Instead of the rope sling a specially developed plastic bolt secures the radio beacon and will be cut when the unit is activated.