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McMurdo Hydrostatic Release
BreaktHRU kit for EPIRBs
(Replaces 82-400A)

The McMurdo HRU (Hydrostatic Release Unit) is the water pressure activated automatic release mechanism for the Smartfind Plus EPIRB Auto Housing (E5 / G5) and older McMurdo EPIRB models (E3 / G4, Rescue406 / Precision406).

The HRU is designed to automatically release the Auto Housing cover and discharge the Smartfind Plus EPIRB at a depth of between 2 - 4 metres. This action is carried out by a small charge within the HRU forcing a blade to cut through a plastic retaining bolt, releasing both the Auto Housing cover and a spring that forces a lever arm to eject the Smartfind Plus EPIRB.
McMurdo Hydrostatic Release Data Sheet (.pdf)

The HRU is a sealed unit which is battery operated and requires replacement every 2 years. The HRU Replacement Kit contains all of the necessary parts to both replace the HRU and the retaining bolt.

Our McMurdo BreaktHRU EPIRB Hydrostatic Release Unit for:
  • Kit for McMurdo EPIRBs 82-962-001A
  • Kit for Kannad Marine EPIRBs K82-962-009A [replaced by 82-962-001A]
  • Kit for Sailor EPIRBs 82-962-002A [replaced by 82-962-001A]
  • Kit for SIMRAD EPIRBs 82-962-003A [replaced by 82-962-001A]
  • Kit for Kelvin Hughes S-VDRs 82-962-007A [replaced by 82-962-001A]
  • Kit for McMurdo C1 S-VDRs 82-962-008A [replaced by 82-962-001A]

  • McMurdo BreaktHRU EPIRB Hydrostatic Release Unit
    #SHY-E List Price $150.00Only $109.00


    Emergency Position Indicating
    Radio Beacons
    ACR, McMurdo,
    & Ocean Signal