Posts Tagged ‘cave diving’

Raising the Dead part 7

Friday, November 13th, 2009

This part goes mainly about the terrible experience of Don Shirley, who got in deep trouble on his long way up after his malfunctioning apparatus.

IT WAS 7 P.M. SATURDAY EVENING in Hong Kong, and Ann Shaw was in her living room. Her 21-year-old daughter, Lisa, was with her, on break from the Royal Melbourne Institute of Technology. The doorbell rang, and Ann opened the door to see Vickers, accompanied by two friends from church. Ann thought the dive wasn’t taking place until the next day, but as soon as she saw the somber group, she knew. Vickers explained that Dave was five hours late. He suggested there was still a chance he could reappear. “Oh, no, he won’t,” Ann replied. “Not if he’s been down there so long.”

Ann, who has a deep faith in God, tried to believe that there was some higher purpose in what was happening. More than anything, though, she was struck by how completely her life had changed in the brief time it took Vickers to relay the news. The last time she’d had that feeling was 30 years earlier, at 19, as she walked down the aisle to be married, with Dave Shaw, himself just 20, waiting for her at the altar.

Back at the hole, van Schaik didn’t have time to think much about Shaw. With five other divers in the water and only two reserve divers on the surface, she had to focus on Don Shirley. She sent Gerhard Du Preez, 31, into the hole to find him, with instructions to check everyone on his way down. Du Preez found Shirley just below the ceiling of the main chamber, checked that he was OK, then turned immediately for the surface to report back.

Alone again, Shirley continued his retreat. As he approached the chamber ceiling at about 164 feet, he started feeling faint. Instinct told him to get off his rebreather and onto his open-circuit bailout before he lost consciousness. He stuffed the regulator into his mouth, and as soon as he did, the cave started to spin around him. Shirley didn’t know it yet, but a small bubble of helium had formed in his left inner ear, causing extreme vertigo. He was in a washing machine, and off the shot line. In the dark, all he could see with his light as he spun was black, followed by the flash of the cave roof, then black. He saw a flash of white go by, and then again. It was the shot line, and without thinking he thrust out his hand to grab it. That grab kept him alive. If he had missed, he would have drifted off, lost in the blackness. Up or down, it wouldn’t really have mattered. Depth or the bends would have finished him, and van Schaik and her divers would have returned to an empty line.

The washing machine finally slowed just long enough for Shirley to read the backlit screen of his primary VR3. It showed he had come up to 114 feet. It also warned him that he needed to be down at 151 feet. Hand over hand, Shirley descended. As he reached his new depth, nausea hit him and he started to vomit. Shirley would feel the heave coming, pull the regulator from his mouth, throw up, and then replace the regulator. Fighting the vertigo and nausea, he managed to grab some spare gas cylinders from the cluster clipped onto the shot line nearby. The thought that he might die never occurred to him. I will survive, I will survive, he kept telling himself.

After about 20 minutes, Truwin Laas, 31, van Schaik’s second reserve diver, appeared. Shirley scratched on his slate, I’M HAVING A BAD TIME. I’VE GOT VERTIGO AND I’M VOMITING. Laas made sure Shirley was breathing the right gas mix for the depth, decided he was stable, and left quickly to update van Schaik. Shirley, alone again, started cycling repeatedly through a subroutine of survival, asking himself, Where should I be now? How long should I be here? And where do I have to go? Each breath was a conscious act that got harder as he tired. Suck, hold, exhale. Suck, hold, exhale. I will survive. I will survive.

Now the marathon began. Van Schaik started cycling divers down to stay with Shirley. Du Preez, Laas, Sander, and Vingerling dived repeatedly that day, racking up three or four dives apiece despite the risk of getting the bends themselves. (Herbst, who was out of action for hours with a suspected minor bend, went down once more; Andrews and Stojakovic had been too deep to dive again.) The divers clipped Shirley to the shot line in case he convulsed or passed out, unclipping him only to move him from one decompression stop to another. Every movement brought a new round of vomiting. “It was heartbreaking to hear,” Vingerling says, mimicking the spastic violence of Shirley’s dry heaves.

Before the dive, Shirley had told the team that if anything went wrong, his wife, Andre, was to be given the bad news straight and fast. Andre, who had stayed behind at Komati Springs to run the dive center, had been getting regular updates. After one call, a slate was taken to Shirley. MESSAGE FROM ANDRE, I LOVE YOU, it read, and then, YOU’D BETTER HANG IN THERE OR ELSE.

After more than ten hours in the water, Shirley finally reached a depth of 20 feet. He was exhausted and approaching hypothermia, but he stayed there decompressing for almost two hours. The next circle of hell was at just ten feet and had to be endured, according to the tables, for a full two hours and 20 minutes. As soon as Shirley settled in, a sharp pain flared in his left leg, a sign that more bends could be on the way. It was time to take his chances on the surface. LOWER LEFT LEG HURT. COULD BE LACK OF USE? he wrote on a slate. Soon after, Sander appeared. I’M HERE TO TAKE YOU HOME, he wrote.

Shirley was carried out. He had been in Bushman’s Hole almost 12 and a half hours. “Don’t cut the drysuit,” he managed to growl when he saw Du Preez coming at him with a pair of shears. Shirley was winched up the cliff face, and within 22 minutes he was in the recompression chamber.

Stay tuned for part 8

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Raising the dead Part 2

Friday, July 31st, 2009

The following is the second part of the true and tragic story about Dave Shaw’s failed attempt to to recover the dead body of  Deon Dreyer who never returned from Bushman’s Hole. His body was found by Dave Shaw ten years later on a world-record dive to 271 Meters, the bottom of Bushman’s cave.

This part describes the unlucky happening on December 17, 1994 when Deon Dreyer did not return to the surface to be found by Shaw 10 years later.

Raising the dead - part 2

DEEP-WATER DIVERS have always been the daredevils of the diving community, pushing far into the dark labyrinths of water-filled holes and extreme ocean depths. It’s a small global fraternity—there are no more than a dozen members—and in the history of recreational diving, only six people other than Shaw have ever pulled off successful dives below 820 feet. (More people have walked on the moon, Don Shirley likes to point out.) At least three ran into serious trouble in the process (including Nuno Gomes, who got stuck in the mud on the bottom of Bushman’s Hole for two minutes before escaping). And two have since died: American Sheck Exley, who drowned while diving the world’s deepest sinkhole, Mexico’s 1,080-foot-deep Zacatón, in April 1994; and Britain’s John Bennett, who disappeared while diving a wreck off the coast of South Korea in March 2004.

“Today extreme divers are far exceeding any reasonable physiology capabilities,” says American Tom Mount, a pioneer in technical diving and the owner of the Miami Shores, Florida–headquartered International Association of Nitrox and Technical Divers (IANTD). “Equipment can go to those depths, but your body might not be able to.”

Aside from the dangers of getting trapped or lost, breathing deep-dive gas mixes—usually a combination of helium, nitrogen, and oxygen known as trimix—at extreme underwater pressure can kill you in any number of ways. For example, at depth, oxygen can become toxic, and nitrogen acts like a narcotic—the deeper you go, the stupider you get. Divers compare narcosis to drinking martinis on an empty stomach, and, depending on the gas mix you’re using, at 800-plus feet you can feel like you’ve downed at least four or five of them all at once. Helium is no better; it can send you into nervous, twitching fits. Then, if you don’t breathe slowly and deeply, carbon dioxide can build up in your lungs and you’ll black out. And if you ascend too quickly, all the nitrogen and helium that has been forced into your tissues under pressure can fizz into tiny bubbles, causing a condition known as the bends, which can result in severe pain, paralysis, and death. To try to avoid getting the bends, extreme divers spend hours on ascent, sitting at targeted depths for carefully calculated periods of decompression to allow the gases to flush safely from their bodies. As divers say, if you do the depth, you do the time.

About Bushman’s Hole

For any diver who can stomach the risks, Bushman’s Hole is world-class. It’s located on the privately owned Mount Carmel game farm, 11,000 acres of rolling, ocher-earthed veldt sparsely thatched with silky bushman grass and dotted with sun-baked termite mounds. Not until you top a small rise a few miles from the farm dwellings do you notice a break in the clean sweep of the land, where the earth starts to fall in on itself as if a giant hammer had come smashing down. The resulting crater is hundreds of feet from rim to rim and walled on one side by a sheer cliff. If you hike down the steep, stony path on the opposite side, you come to a small, swimming-pool-size basin of water, covered in a green carpet of duckweed. This is the entrance to Bushman’s Hole.

No one had any idea how deep Bushman’s was until Nuno Gomes arrived. On his first visit, in 1981, the Johannesburg-based Gomes dived to almost 250 feet, dropping down through a narrow chimney that opens up into an enormous chamber below 150 feet. In 1988, he set an African depth record of just over 400 feet, and Bushman’s reputation as a deep diver’s cave started to spread. In 1993, Sheck Exley showed up. Supported by a team that included Gomes, Exley became the first diver to hit bottom, touching down at 863 feet on the hole’s sloping floor.

During the Exley expedition, Gomes performed a sonar scan of the hole. It revealed Bushman’s to be the largest freshwater cave ever discovered, with a main chamber that was approximately 770 feet by 250 feet across and more than 870 feet deep. (Gomes later found a maximum depth of at least 927 feet.)

Diving Bushman’s is exhilarating. The narrow entrance is claustrophobic, but once you reach the vast main chamber, it’s like spacewalking. For a young cave diver like Deon Dreyer, it must have been irresistible. Deon grew up in the modest town of Vereeniging, about 35 miles south of Johannesburg, and loved adventure in all its forms. He shot his first buck at the age of ten. By 17 he was racing a souped-up car around local tracks, tinkering with his motorcycle, and designing obscenely loud car stereos. Another of his passions was diving. “He couldn’t sit still, never, ever, ever,” says his younger brother, Werner, now 27.

Deon Dreyer

Deon had logged about 200 dives when he was invited to join some South Africa Cave Diving Association divers at Bushman’s Hole over the 1994 Christmas break. They planned a descent to 492 feet and asked Deon to dive support. He was thrilled. Two weeks before the expedition, Deon’s grandfather passed away. Sitting around a barbecue with his family one night, Deon spoke with boyish hubris. “He said if he had a choice of how to go out in life, he’d like to go out diving,” recalls his father, Theo, 51, the owner of a business that sells and services two-way radios.

Deon’s mother, Marie, a petite 50-year-old, begged Deon not to go. In 1993, Bushman’s Hole had already taken the life of a diver named Eben Leyden, who blacked out at 200 feet. (A dive buddy rushed him to the surface, but Leyden didn’t survive.) And then, on December 17, 1994, the hole claimed Deon Dreyer.

For Marie and Theo, the nightmare started with a policeman’s knock at the door. They rushed to Mount Carmel, where slowly the story came out. The team had been doing a practice dive. On the way back up, at 196 feet, Deon appeared to be fine, exchanging hand signals with his buddy. The group continued ascending. At 164 feet they suddenly noticed a light below them. A quick, confused diver count came up one short. Team leader Dietloff Giliomee wasn’t sure what was happening. Then another diver, in the eerie glow of his submersible light, dragged his finger across his throat. Giliomee desperately started swimming down but stopped when he realized the light below him was already more than 100 feet deeper and fading fast. “I decided it was a suicide chase,” he wrote in the accident report.

No one knows for sure what killed Deon. The best guess is deep-water blackout from carbon dioxide buildup. Two weeks after the accident, Theo paid to bring in a small, remotely operated sub used by the De Beers mining company. It found Deon’s dive helmet on the vast floor of Bushman’s, but there was no sign of his body. Resigning themselves to the idea that Deon would stay in the hole for eternity, Theo and Marie placed a commemorative plaque on a rock wall above the entry pool. “He had the most majestic grave in the country,” Theo says. “And I said, ‘Well, this will be his final resting place.’ ”

But on October 30, 2004, Dave Shaw called Theo and said, “I will go and fetch your son.” Theo immediately responded, “Yes, absolutely yes.” More than anything, he realized, he wanted to see his boy again.

much more to come…

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Bushman’s Hole - Raising the Dead - part 1

Wednesday, July 29th, 2009

The following story is a copy - paste about the promise of Dave Shaw, an Australian extreme Cave-diver to lift the dead body of Deon Dreyer who was missed since 10 years in Bushman’s hole in South Africa, the biggest underwater cave in the world.

Many fellow divers know that story but as I have here on dive-monster.com a lot of non divers too, i want to give the chance to read this compelling human story of friendship, heroism, unswerving ambition and of coming to terms with loss and tragedy.

The story about Bushman’s Hole I publish here is written by Tim Zimmermann and was published in the page of outside.away.com

Raising the Dead part 1

Ten minutes into his dive, Dave Shaw started to look for the bottom. Utter blackness pressed in on him from all sides, and he directed his high-intensity light downward, hoping for a flash of rock or mud. Shaw, a 50-year-old Aussie, was in an alien world, more than 800 feet below the surface pool that marks the entrance to Bushman’s Hole, a remote sinkhole in the Northern Cape province of South Africa and the third-deepest freshwater cave known to man.

Shaw’s stocky five-foot-ten body was encased in a black crushed-neoprene drysuit. On his back he carried a closed-circuit rebreather set, which, unlike traditional open-circuit scuba gear, was recycling the gas Shaw breathed, scrubbing out the carbon dioxide he exhaled and adding back oxygen. He carried six cylinders of gas, splayed alongside him like mutant appendages. On the surface, Shaw would barely have been able to move. But in the water, descending the shot line guiding him from the cave’s entrance to the bottom, he was weightless and graceful, a black creature with just a flash of skin showing behind his mask, gliding downward without emitting a single bubble to disrupt the ethereal silence.

Only two divers had ever been to this depth in Bushman’s before. One of them, a South African named Nuno Gomes, had claimed a world record in 1996 when he hit bottom, on open-circuit gear, at 927 feet. Gomes had turned immediately for the surface. But Shaw, a Cathay Pacific Airways pilot based in Hong Kong and a man who had become one of the most audacious explorers in cave diving, didn’t strive for depth alone. He planned to bottom out Bushman’s Hole at a depth that no rebreather had ever been taken, connect a light reel of cave line to the shot line, and then swim off to perform the sublime act of having a look around. At that moment late last October, cocooned in more than a billion gallons of water, Dave Shaw was a very happy man.

The Discovery

Shaw touched down on the cave’s sloping bottom well up from where Gomes had landed, clipped off the cave reel, and started swimming. There was no time to waste. Every minute he spent on the bottom—his VR3 dive computer said he was now approaching 886 feet—would add more than an hour of decompression time on the way up. Still, Shaw felt remarkably relaxed, sweeping his light left and right, reveling in the fact that he was the first human ever to lay line at this depth. Suddenly, he stopped. About 50 feet to his left, perfectly illuminated in the gin-clear water, was a human body. It was on its back, the arms reaching toward the surface. Shaw knew immediately who it was: Deon Dreyer, a 20-year-old South African who had blacked out deep in Bushman’s ten years earlier and disappeared. Divers had been keeping an eye out for him ever since.

The Decision

Shaw turned immediately, unspooling cave line as he went. Up close, he could see that Deon’s tanks and dive harness, snugged around a black-and-tan wetsuit, appeared to be intact. Deon’s head and hands, exposed to the water, were skeletonized, but his mask was eerily in place on the skull. Thinking he should try to bring Deon back to the surface, Shaw wrapped his arms around the corpse and tried to lift. It didn’t move. Shaw knelt down and heaved again. Nothing. Deon’s air tanks and the battery pack for his light appeared to be firmly embedded in the mud underneath him, and Shaw was starting to pant from exertion.

This isn’t wise, he chastised himself. I’m at 270 meters and working too hard. He was also already a minute over his planned bottom time. Shaw quickly tied the cave reel to Deon’s tanks, so the body could be found again, and returned to the shot line to start his ascent.

Approaching 400 feet, almost an hour into the dive, Shaw met up with his close friend Don Shirley, a 48-year-old British expat who runs a technical-diving school in Badplaas, South Africa. After Shirley checked that Shaw was OK and retrieved some spare gas cylinders hanging on the shot line below, Shaw showed him an underwater slate on which he had written 270m, found body. Shirley’s eyebrows shot up inside his mask, and he reached out to shake his friend’s hand.

Shirley left Shaw, who had another eight hours and 40 minutes of decompression to complete. As Shirley ascended, it occurred to him that Shaw would not be able to resist coming back to try to recover Deon. Shirley would have been content to leave the body where it was, but Shaw was a man who dived to expand the limits of the possible. He had just hit a record depth on a rebreather, and now he had the opportunity to return a dead boy to his parents and, in the process, do something equally stunning: make the deepest body recovery in the history of diving.

“Dave felt very connected with Deon,” Shirley says. “He had found him, so it was like a personal thing that he should bring him back.”

When Shaw finally surfaced in the late-afternoon African sun, he removed his mask and said, I want to try to take him out….”

stay tuned for part 2

cheers

Rhoody

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