What is an HRU? Hydrostatic Release Unit Explained for Automatic Life Raft & EPIRB Deployment
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HRU Explained: Ensuring Life Raft Autonomy
🎥 Visual Guide: How HRUs Activate
💧 The Science of the "Float Free" System
Pressure-Sensitive Trigger
As the ship sinks, water enters the HRU chamber. Once the pressure reaches the calibrated threshold (usually 4 meters depth), a diaphragm or spring-loaded blade cuts the securing line.
Painter Line Deployment
The life raft floats to the surface, pulling the painter line out of the container. The HRU's "Weak Link" ensures the raft inflates and then detaches from the sinking vessel.
Mandatory Replacement Cycles
Because they are disposable, sealed units, HRUs must be replaced every 2 years. Using an expired HRU is a major non-conformity during PSC inspections and compromises lives.
📚 Marine Safety Reference Library
🌐 Mariner Travel & Port Logistics
Ensure your shore leave and crew changes are handled with professional ease.
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