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Deep-sea Rescue Equipment

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GMT - 3 Hours Deep-sea Rescue Equipment

Post by News Poster Sat Nov 23, 2013 6:50 pm

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Remote Operated Vehicle Super Scorpio is retrieved after completing a pod delivery exercise during Sorbet Royal 2002.
Photo courtesy U.S. Navy


The equipment used in deep-sea rescues is like something from a James Bond movie. From remote-controlled subs with robot arms to deep-sea diving suits, modern technology has greatly increased the odds of a successful rescue.
Remote-operated vehicles (ROVs) are a crucial part of deep-sea rescue. These underwater craft range in size from 2 feet long to the size of a small car. They're typically tethered to another submarine or surface ship. The power and remote capabilities are supplied by this tether, which also provides a conduit for the video and audio relay cables. ROVs are usually equipped with both video and still cameras. They also have remote-operated robotic arms with lifters, grabbers, pinchers and cutters. Many times an ROV is sent down to access the situation so the crew can decide the best course of action for response. If the disabled submarine is simply trapped or has lost power, the ROV can often cut it free or tow it to the surface.
Hard-shelled suits that can withstand pressure as deep as 2,000 feet, known as Atmospheric Diving Suits (ADS), were put into action in 2001. With a constant internal pressure of one atmosphere, the ADS allows divers to ascend to the surface at any rate of speed without requiring decompression. With this technology, human divers are now able to access situations firsthand, provide emergency life support and prepare the sub for mating, the process of joining the vessel to another.
Submarine Rescue Chambers (SRCs) are metal pods that can be attached, or mated, to a disabled submarine. These chambers remain pressurized and allow for the safe extraction of the crew. Once on board, the SRC detaches from the sub and ascends to the surface at a safe rate. There's a similar unit called a Transportable Recompression Chamber System (TRCS) that's used in the evacuation and recompression of deep-sea crew. A transfer lock attaches and forms an airtight seal between the sub's hatch and the TRC, allowing medical personnel to go back and forth in a pressurized environment. Like the SRC, the TRCS is pulled back to the surface by a cable and the crew is gradually recompressed.
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The Atmospheric Dive Suit (ADS) is lowered into the water for a dive.
Photo courtesy U.S. Navy
Another new addition to the deep-sea rescue fleet is the Emergency Evacuation Hyperbaric Stretcher (EEHS), portable, collapsible one-man chambers that are used to move individual sailors to safety in a pressurized environment. The EEHS was used in the extraction of the trapped miners in Somerset, Pa., in 2002. The air pressure that miners experience deep into the earth is similar to the water pressure that deep-sea divers endure. The EEHS provides safe transport to recompression chambers.
In the next section, you can find out about deep-sea rescue training exercises.
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