Which part of the float-free arrangement for inflatable liferafts is made to release the liferaft after being automatically inflated during the ship is sinking?
The part of the float-free arrangement for inflatable liferafts that is made to release the liferaft after being automatically inflated during the ship sinking is the hydrostatic release unit (HRU). The HRU is designed to automatically release the liferaft from its cradle or storage position when it is submerged to a certain depth, typically around 1.5 to 4 meters. This ensures that the liferaft is deployed and inflated even if the ship sinks rapidly, allowing it to rise to the surface and provide a means of escape for the crew.
The part of the float-free arrangement for inflatable liferafts that is made to release the liferaft after being automatically inflated during the ship sinking is called the hydrostatic release unit (HRU).
The part of the float-free arrangement for inflatable liferafts that is made to release the liferaft after being automatically inflated during a ship sinking is called the hydrostatic release unit (HRU). The HRU is a mechanical device designed to automatically release the liferaft from its stowage position on a sinking vessel. It is typically located within a canister or bracket and is activated by water pressure at a certain depth, usually around 1.5 to 4 meters (5 to 13 feet) below the water surface.
To understand how the HRU works, it's important to note that it operates based on hydrostatic pressure. When a ship sinks, as it reaches a certain depth, the water pressure on the HRU increases. This increased pressure activates the release mechanism inside the HRU, allowing the liferaft to detach from the sinking vessel.
The HRU consists of a hydrostatic release unit with a weak link or a disposable or replaceable element designed to break or release at a specific water pressure or depth. The release mechanism is calibrated to withstand normal operating conditions but will release the liferaft in an emergency when the ship is sinking.
It's crucial for the HRU to be properly installed, regularly inspected, and maintained according to manufacturer instructions to ensure it functions correctly in an emergency. Shipping companies and vessel operators must comply with international regulations and guidelines to ensure the float-free arrangement, including the HRU, is in place and functional to enhance the safety of the crew and passengers in case of a maritime emergency.