PST Exit Exam • Set 8 Question 21 of 30
What mechanism allows a float-free EPIRB to automatically release from a sinking ship?
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Direct Answer
Option A: Hydrostatic Release Unit (HRU) at a depth of 1.5 to 4 meters
HRUs cut the securing mechanism at 1.5 - 4 m water depth, allowing the buoyant EPIRB to float free and activate automatically.
All Options
A
Hydrostatic Release Unit (HRU) at a depth of 1.5 to 4 meters
(Correct Answer)
B
Manual pull pin only
C
Thermal fuse at 100 degrees C
D
Solenoic electrical switch from bridge
Detailed Explanation & Context
HRUs cut the securing mechanism at 1.5 - 4 m water depth, allowing the buoyant EPIRB to float free and activate automatically.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Personal Survival Techniques (PST).
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