🔍 Key Concepts

• Hydrostatic release unit (HRU) location and purpose on a liferaft cradle • How the painter line, weak link, and strong point connect through or near the HRU • Difference between securing straps/cradle and the automatic release device

💭 Think About

• On this illustration, which numbered item is the device that will automatically cut the securing connection when submerged, allowing the raft canister to float free? • Which number is attached between the raft’s securing strap and the ship’s structure, rather than on the raft canister itself or out on the painter line? • Look at the shape: which numbered part looks like a metal mechanism housing (with moving parts) instead of a simple line, strap, or label?

✅ Before You Answer

• Verify which numbered part is mounted below the canister on the cradle and is in the load path holding the raft down. • Confirm that the item you choose is not just the painter, weak link, or strong point, but the mechanism that senses water pressure. • Make sure the number you pick corresponds to a mechanical release unit, not a label, strap, cradle, or deck pad eye.