The function of hydrostatic release unit is:
Direct Answer
Option C: To automatically unhook the lashing and release the life raft when the ship sinks
The hydrostatic release unit (HRU) is designed to operate automatically at a depth of 1.5 to 4 meters. When a vessel sinks, the pressure forces a piston to cut a weak link, allowing the liferaft to float free and inflate, thus preventing it from being pulled down by the sinking vessel.
All Options
Detailed Explanation & Context
The hydrostatic release unit (HRU) is designed to operate automatically at a depth of 1.5 to 4 meters. When a vessel sinks, the pressure forces a piston to cut a weak link, allowing the liferaft to float free and inflate, thus preventing it from being pulled down by the sinking vessel.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Personal Survival Techniques (PST).
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