Safety, Fire & Survival · GMDSS — EPIRB Release
A float-free EPIRB is released automatically by a:
- AManual lanyard only
- BTimer set by the crew
- CHydrostatic release unit (HRU) when the vessel sinks✓ Correct
- DRemote signal from shore
Explanation
The hydrostatic release unit releases the EPIRB at a depth of a few meters as the vessel founders; the EPIRB then floats clear and activates automatically, alerting SAR even if the crew could not act.
Authority: SOLAS Chapter IV; LSA/IMO performance standards
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