🔍 Key Concepts

• Hydrostatic release unit (HRU) function on inflatable liferafts • What components are activated by water pressure vs. what is activated only after the raft inflates/floats free • The difference between equipment mounted on the raft itself and the device that secures it to the ship

💭 Think About

• Ask yourself: What is the ONE job of the hydrostatic release when the ship sinks? Think about what it has to physically do so the raft can float free. • Which items listed are built into the liferaft canister or raft pack, and which are part of the securing mechanism between raft and ship? • Which of these actions would still occur if the raft had already floated free and inflated, even if the hydrostatic release had done nothing?

✅ Before You Answer

• Identify which listed actions are performed by the liferaft and its survival equipment versus the HRU that cuts it loose from the vessel. • Check which function specifically depends on water pressure acting on the release unit. • Eliminate any options that describe things that normally happen after the raft is already in the water and inflating.