Boating fails | A Fish Rescue | Pre-owned Vicem | A Sporty Pontoon - 9/26/25
⚓US Coast Guard Captain's LicensePractice Question - Answer
C. must be submerged to a certain depth to release automatically
A hydrostatic release mechanism (HRU) is designed to automatically release a liferaft when submerged to a depth of about 1.5 to 4 meters, which is why answer C is the correct choice. The pressure from the water at this depth activates the HRU's release mechanism, allowing the liferaft to float to the surface. It does not require manual operation, nor does it inflate the raft in the cradle.
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