How does the hydrostatic release system of life raft work?

How does a hydrostatic release work on a life raft?

A HRU uses water pressure to activate a spring-loaded blade, cutting through liferaft securing straps. As the raft floats upwards, it automatically inflates when the painter pulls tight. Additional buoyancy from the inflated raft then breaks the “weak link”, releasing the raft from the vessel.

How do I manually run a life raft?

Launching Raft by Davit:

  1. Open the lashing and remove the raft container from HRU by opening the manual slip hook or bottle screw arrangement.
  2. Tie up the one end of the painter of raft into a strong point at deck.
  3. Keep the container in the open and attach the davit hook to the given eye in the canister/ container.

What are the listed requirements for hydrostatic release unit?

A part of the liferaft lashing used for automatic liferaft release. At up to 4m water pressure activates release mechanism and the liferaft is free to float clear to the surface.

How much water is in a life raft per person?

Water ration- 1.5 litres of fresh water for each person. One rustproof graduated drinking vessel. Anti seasickness medicine is sufficient for at least 48 hours and one seasickness bag for each person. Instructions on how to survive (Survival booklet)

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How long can you survive in a life raft?

Life rafts can help you survive for as many as five days, assuming dehydration doesn’t kill you first.

How often should a life raft be serviced?

The maximum period between services shall be 3 years. Thereafter, such liferafts shall be serviced annually, in accordance with the manufacturer’s instructions. Inflatable lifejackets shall be serviced in accordance with the manufacturer’s instructions, at an approved service station, and at least every 2 years.

What is the minimum capacity of life raft?

A liferaft with a carrying capacity of less than six people can not be allowed to transport people. If the liferaft should not be launched by a launching device, then the mass of the life raft, its container and its equipment should not be more than 185 kg.

What is the expiration of HRU?

from the install date or four (4) years from the date of manufacture, whichever is less. The HRU has a calendar on its top side; the calendar should be marked with the expiration date at the time of installation, according to the following instructions.