Hammar H20 Blue Top Six-Metre Deep Release HRU

The Hammar H20 Blue Top Six-metre Deep Release Hydrostatic Release Unit (HRU) was initially designed for Royal Navy liferafts and is also used on marine evacuation system rafts which are fitted to high-speed craft.

Activated by water pressure, the Hammar H20 Blue Top HRU will ensure that a liferaft floats free from a stricken vessel as its operation is triggered at a release depth of approximately six metres.


  • Double looped white rope line
  • Release mechanism
  • Red Weak Line™ with breaking strength 2.2kN ± 0.4kN
  • NATO Approved

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