What is the primary purpose of a hydrostatic release on a life raft?

• A. Detach the raft from its cradle automatically when submerged
• B. Inflate the raft manually using a pump
• C. Activate emergency flares
• D. Provide buoyancy to the raft

Answer: (A)

The main idea here is automatic detachment. A hydrostatic release is designed to automatically free the liferaft from its cradle when the vessel becomes submerged. It senses the water pressure as the hull sinks, and at a prescribed depth it releases the raft so it can float to the surface and deploy. Once released, the raft’s own inflation system takes over and the canopy inflates for boarding. This mechanism isn’t about manual pumping, signaling flares, or adding buoyancy—the raft already has buoyancy, and inflation is handled by its own system after release.