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Submerged & Unconscious Casualty Recovery Net.
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This design followed a statement from an RNLI instructor that there is only 20 minutes to get a submerged casualties face out of the water and start CPR, and a report from the MAIB describing a fishing boat off Scotland that lost a crew member after 45 minutes of trying and failing to get him back onboard in rough seas.
The concept is simple;
- on reaching a submerged or unconscious casualty the net is thrown over them, the lower opening constricted and the casualty brought back on the boat quickly.
- The outer ring of the net is weighted, causing it to fall around the person, and a secondary line is pulled to close the opening.
- The top rope can then be used to recovery the person by hand, or by winch, and the net provides hand holds around the body.
We made a prototype and tested it with Solent Rescue Lifeboat and the feedback was good.
This was only a proof-of-concept trial, so do not judge the design too closely. If we went to production then there are many aspects that need to be improved.
Benefits include:
- Can be used with a high free board
- Dropped over the casualty from the vessel, does not need to be thrown or assembled on vessel.
- No rescuer has to enter the water
- The casualty is head out of the water within moments of arriving on scene
- Can be used in rough seas
- Cheap, simple, effective,
- won’t go out of date
If required, it could be used on a conscious casualty, but there is a chance they could become distressed or struggle, so it is intended for submerged or unconscious casualties. It fits into the same category as the Jason Cradle, but is cheaper and suitable for use in sea conditions where a Jason’s Cradles would struggle or the freeboard of the vessel is not suitable.
Dyena are seeking a partner to take on this idea. If you’re interested, then get in touch.
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A net is deployed over the casualty, with a weighted outer edge causing it to sink below the casualty.
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The lower opening of the net is constricted by withdrawing the lower line fully encapsulating the casualty in the net.
The net can then be hauled aboard the rescue vessel.
The holes in the net allow emergency first aid to begin as soon as the casualty is on the vessel deck before the net is removed.
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Trial With Solent Rescue
Casualty in water
Rescue Net deployed over them
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Casualty pulled onto vessel. Net provides hand holds.
CPR can begin through net as soon as the casualty is on deck.
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