What is the purpose of the hydrostatic release on an inflatable liferaft?

Correct Answer: Option B — To release the raft from the cradle automatically as the ship sinks

Hydrostatic release units are engineered to automatically sever the liferaft container securing strap when a sinking vessel reaches a depth of 1.5 to 4 meters. Complying with SOLAS Chapter III and 46 CFR, water pressure pushes a diaphragm, driving a knife blade to free the painter line.