McMurdo 23-145A EPIRB Hydrostatic Release Unit (HRU)McMurdo Hammar H20e Hydrostatic release unit designed to fit the McMurdo Automatic EPIRB Housings with the required breakthru rod. The Hammar H20 is the biggest selling hydrostatic release unit in the world. Its safe, reliable and simple design has earned it more worldwide approvals than any other unit. Fits: G8 / E8 / G8AIS / SAFE / SAFEPRO & SAFEPRO AIS Compact Classified non-hazardous Complies with the latest SOLAS and IMO resolutions Fits the footprint of existing HRUs Service life of two years | 
