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  Cover Story May 27th, 2010     
Untitled Document


Left, the scientific party which sailed on HMS Challenger.
Right, on deck, HMS Challenger,
Center, Joesph Matkin, Diarist, journalist, and Recorder of daily events during the lengthy cruise of HMS Challenger.

by lyle e davis

We who live in the San Diego area are often only marginally aware of a major scientific institution that is close by . . . the Scripps Institute of Oceanography.

Faculty and students at this institution do just what its name implies. They study the oceans in all of its various forms and locations, its depths, its salinity, its impact on weather, a complete spectrum of areas to explore and discover.

Such discoveries are not new, just growing.

By combining the resources of the archives within the Scripps Institute of Oceanography and the considerable writing talents of Allan Bellow, founder, designer, and managing editor of DamnInteresting.com an interesting history of this exploration emerges and gives us a look at just some of what goes into this sometimes lonely science. The cruise of HMS Challenger was the first expedition organized and funded for a specific scientific purpose: to examine the deep-sea floor and answer comprehensive questions about the ocean environment.

The "History of Oceanography: HMS Challenger" exhibit at the Birch Aquarium at Scripps, and the Challenger letters of Joseph Matkin, most of which are held in the archives of the Scripps Institution of Oceanography combine to tell a fascinating preliminary story. In one of his earliest entries:

November 22, 1872
We have two Steam Boats on board, and about 30 miles of deep sea line, and dredging line, the other six boats we shall take in when we go into the river next week. All the Scientific Chaps are on board, and have been busy during the week stowing their gear away. There are some thousands of small air tight Bottles, and little boxes about the size of Valentine boxes packed in Iron Tanks for keeping specimens in, insects, butterflies, mosses, plants etc. There is a photographic room on the main deck, also a dissecting room for carving up Bears, Whales , etc.
Joseph Matkin
HMS Challenger

Challenger left Portsmouth with 269 persons aboard: 23 naval officers under the command of Captain George Strong Nares, the scientific team of six, led by Professor Wyville Thomson, and a crew of 240. Only a few of the ‘bluejackets' or crew, are known to us now, most notably, by virtue of his letters, Ship's Steward's Assistant Joe Matkin, who brings Challenger's tale to life.

Did I tell you we had a Brass Band on board composed mainly of seamen and marines who volunteered. The Officers bought the Instruments and provided a Bandmaster to teach them; there were 15 volunteers and 9 wanted to play the big drum, they practice every day in the fore peak of the vessel and the noise is something fearful and causes the Watch below to swear a good deal. The Bandmaster expects to fetch tolerable music in about 6 months.
--Joseph Matkin
HMS Challenger

We left Sheerness last Saturday week, and had awful weather round, having to put back three times, once into Deal on the Monday, into Folkestone on Tuesday, and into Dungeness on the Wednesday, arriving here on Thursday; the distance is 105 miles and we were 109 hours steaming fullspeed all the way. The wind was dead against us, and it commenced to increase as soon as we had passed Dover on the Saturday night, in the morning it had increased to a gale, and we found ourselves close into the coast of France. At 10 o'clock on Sunday the Captain gave orders to put back for theDowns, but the wind arose to a hurricane and we could make no head way against it. At Midnight the ship passed through a Cyclone, which caused the sea to come right over her and go down into the Engine room, through the hatchways, nearly putting out the fires; the Life boat cutter was smashed to atoms, and the Jib boom carried away with all the Head Sails, so that the ship drifted along under a single storm stay sail. She rolled fearfully all night, I was pitched out of my Hammock two or three times, and think it was the most fearful night I ever passed in my life. Several ships were wrecked close to us, and it was considered the roughest night on the Southern coast for the last eight years.

We reached Deal on the Monday and waited until the storm abated, there were hundreds of vessels of all nations at anchor in the Downs. Directly we dropped ours the Scientific blokes made a rush for the railway station, and came on to Portsmouth by train, arriving two days before us. They lay about sea sick during the gale and the sailors did make game of them.

On 21 December 1872, the British naval corvette HMS Challenger sailed from Portsmouth, England, on an historic endeavor. Although the sophisticated steam-assisted sailing vessel had been originally constructed as a combat ship, her instruments of war had been recently removed to make room for laboratories, dredging equipment, and measuring apparatuses. She and her crew of 243 sailors and scientists set out on a long, meandering circumnavigation of the globe with orders to catalog the ocean’s depth, temperature, salinity, currents, and biology at hundreds of sites–an oceanographic effort far more ambitious than any undertaken before it.

For three and a half long, dreary years the crew spent day after day dredging, measuring, and probing the oceans. Although the data they collected was scientifically indispensable, men were driven to madness by the tedium, and some sixty souls ultimately opted to jump ship rather than take yet another depth measurement or temperature reading. One day in 1875, however, as the crew were “sounding” an area near the Mariana Islands in the western Pacific, the sea swallowed an astonishing 4,575 fathoms (about five miles) of measuring line before the sounding weight reached the floor of the ocean. The bedraggled researchers had discovered an undersea valley which would come to be known as the Challenger Deep. Reaching 6.78 miles at its lowest point, it is now known to be the deepest location on the whole of the Earth. The region is of such immense depth that if Mount Everest were to be set on the sea floor at that location, the mighty mountain’s peak would still be under more than a mile of water.

Nothing was known of what organisms and formations might lurk at such depths. Many scientists of the day were convinced that such crevasses must be lifeless places considering the immense pressure, relative cold, total lack of sunlight, and presumed absence of oxygen. It would be almost a century before a handful of inventors and explorers finally resolved to go down there and take a look for themselves.

In the years that followed the Challenger expedition, subsequent surveys of the region ascertained that the Challenger Deep is part of a much larger formation, the massive Mariana Trench. This 1,580 mile-long trench is the result of the Pacific tectonic plate subducting beneath the Mariana Plate, and the water pressure at its floor is so difficult to comprehend that it is oft described with incomprehensible analogies as “the weight of fifty jumbo jets,” “the weight of 1,600 elephants on every centimeter of your body,” or “all life as you know it stopping instantaneously and every molecule in your body exploding at the speed of light.”

The first scientist with the know-how and wherewithal to seriously consider a dive to the bottom of the Mariana was Auguste Piccard, a Swiss professor, physicist, and inventor of some repute. In the early 1930s, he had gained considerable scientific fame by constructing and piloting the world’s first manned stratospheric balloon, using a pressurized sphere and helium gasbag of his own design to reach altitudes than no human had previously attained. From over 70,000 feet, he conducted experiments to measure cosmic rays, and made measurements to help prove the theories of his friend Albert Einstein. Piccard’s wife–mortified that a middle-aged man would repeatedly subject himself to such risks–insisted that he retire his ballooning career. Much to her surprise, he agreed.

It turned out that he had grander plans afoot. Piccard had realized that a variation of his stratospheric balloon concept could be used as a deep-sea diving apparatus, and he soon set to work constructing his first bathyscaphe vehicle. The contraption consisted of a high-pressure passenger sphere suspended beneath a different kind of gasbag–a steel float chamber filled with gasoline. Gasoline is much lighter than water, causing it to be buoyant; yet it does not compress as air would, which allowed the tank to resist crushing even at extreme depths. The bathyscaphe operated a bit like an underwater zeppelin: operators descended by using pumps to replace small portions of gasoline with seawater, thereby reducing buoyancy. To ascend, operators used controls to let loose some of the onboard iron pellets used as ballast, thereby increasing buoyancy. Small electric propellers provided horizontal navigation.

Piccard finished his prototype in 1948, and conducted a number of unmanned test dives as far as 10,000 feet. In 1950 he sold the vehicle to the French Navy in order to begin construction on an improved design, the bathyscaphe Trieste. The new vehicle’s thirteen-metric-ton pressure sphere could accommodate two passengers–albeit quite cramped–and included oxygen tanks, rebreathers, and carbon dioxide scrubbers. Its hull was five inches thick, and it had a single, five-centimeter-wide window made from a thick cone of lucite–the only transparent material capable of withstanding the depths this vehicle was intended to reach. After the craft had undertaken a number of successful test dives, the US Navy purchased the Trieste and shipped it to the Marianas to use it in Project Nekton–a series of dives into the ocean’s deepest, darkest recesses to gather information regarding sunlight penetration, underwater visibility, transmission of man-made sounds, and marine geological studies of the trench.

On 23 January 1960, two men clambered aboard the Trieste for its attempt to dive into the Challenger Deep of the Mariana Trench: marine specialist Lieutenant Don Walsh of the US Navy; and oceanographer Jacques Piccard, son of the vehicle’s inventor. At 76 years of age, Auguste himself was unable to take part personally. The two hydronauts were expected to be confined in their battery-powered pressure sphere for over eight hours, including almost four hours each for the seven-mile descent and re-ascent. Since no manned or unmanned vessel had ever braved the journey to the Challenger Deep, no one was sure how much life, if any, would be found there. Most scientists were reasonably sure that microorganisms would be found, but some thought it unlikely that vertebrates could withstand such an inhospitable environment.

The men engaged the pumps to fill the ballast tanks with water, and the Trieste slipped beneath the waves to begin its long descent. It only took about sixteen minutes for the explorers to enter the aphotic zone–the depth at which no light from the surface is present–and the world outside the tiny window was left in utter darkness aside from the occasional faint flicker of phosphorescent organisms. From time to time the Trieste would slow and stop as she encountered a deeper, colder thermal layer, and more gasoline had to be pumped from the float chamber in order to continue the descent. The two men periodically reported their progress via a sonar-based phone handset, however there was little to report aside from the rapidly rising readings on the pressure gauges and the falling readings on the thermometers. The warmth inside the uninsulated sphere steadily dwindled.

Partway into their long descent, Walsh and Piccard grew alarmed when they discovered they were no longer able to raise the mother ship on the sonar/hydrophone communication system, even after repeated attempts. The two men were thus left truly isolated from the outside world. Curled up in the cramped, cold, and dimly-lit sphere, the adventurers continued their hours-long downward journey with only one another’s voices and the occasional pop or groan from the Trieste’s strained hull to punctuate the anxious silence.

At approximately four hours into their descent–several thousand feet above the sea floor–a sharp clang sounded through the pressure sphere and the vehicle shuddered violently. Once their wincing subsided, the men did what they could to inspect the craft and its condition. It seemed that the water pressure at this never-before-encountered depth–six tons per square inch–had cracked the outer pane of the lucite window. For the moment the vehicle itself remained watertight, but the damage was worrisome. The Trieste was outfitted with a few safety systems; for instance, the ballast doors were held closed by electromagnets, so in the event of electrical failure the doors would fall open and drop the ballast, causing the vehicle to rise to the surface. But such systems would be of no help to the men inside if the 1,000 atmospheres of pressure crushed their delicate passenger compartment. Moreover, no other vehicle in existence was capable of reaching such depths, which meant that if her float tank became compromised there was no chance of rescue. Nevertheless, the stalwart scientists opted to press on.

About three quarters of an hour later, the bathyscaphe Trieste made history as its hull came to a gentle rest on the silty floor of the Challenger Deep abyss. The Trieste and her crew had spent four hours and forty-eight minutes in transit. The bathyscaphe instrumentation indicated a depth of 37,798 feet and external pressure of 1,099 atmospheres–approximately eight tons per square inch. The scientists flicked on the exterior lights to cast light on a patch of earth that had not been illuminated in millions of years, and peered out through the peephole. Through the swirling clouds of agitated silt and sediment the pair could make out a flatfish which had been disturbed by the vehicle’s unexpected touchdown. They also spotted some shrimp and jellyfish swimming nearby. These observations proved that the water even at such depths was not stagnant and stationary–there was sufficient ocean current to bring in oxygen for complex life. The mission was not equipped with cameras, however, so the historic exploratory moment was sadly left unphotographed.

Walsh and Piccard attempted to use the sonar/hydrophone handset again, and found that it had inexplicably regained function. They reported their arrival and observations to the mother ship, and although their voices took approximately seven seconds to cross the seven miles of water, they came through quiet yet clear. The hydronauts observed the “diatomaceous ooze” through their tiny, cracked window, shivering in the 45F degree cold and munching chocolate bars to regain lost calories. For the most part, the few organisms they observed were little different from those found in the miles of water above them. Thirty or so minutes later, concerned that the damaged lucite porthole would not withstand the pressure indefinitely, the men dumped two tons of iron ballast and the vehicle slowly began to rise. Three and a quarter uneventful hours later, the bathyscaphe Trieste bobbed to the Pacific surface, having entered the history books with a record that could never be bested. Walsh and Piccard had been to the abyss and back.

Later the same day, the US Department of Navy issued a press release boasting that “the United States now possesses the capability for manned exploration of the sea down to the deepest part of its floor.” Project Nekton was a success. Jacques Piccard and Lt. Don Walsh were flown to Washington DC to receive decorations from President Eisenhower, and to retell the story of their descent of alternating boredom and terror.

Grand plans were hatched to do further research with the intrepid bathyscaphe, including bringing back samples of water, soil, and organisms from the abyssal trench. The US Navy, however, was less enthusiastic. The millions of dollars they had invested in the mission had not borne any particularly compelling scientific fruit aside from proving that such a dive was possible. Perhaps most importantly, they had demonstrated America’s deep-sea dominance to the pesky Soviets. Moreover, the public’s fickle attention was fixed rather firmly on the developing Space Race, leaving little interest in oceanic exploration.

For a few years the Trieste continued her career as a diving vehicle, though never again to such depths as the Challenger Deep. Most of her later missions were pedestrian by comparison, although when the nuclear submarine USS Thresher was lost at sea in 1963 she did participate substantially in the search efforts. Soon thereafter she was retired, and many of her systems were incorporated into other dive vehicles. Much of her outer hull was left intact, however, and it is currently on exhibit at the Navy Museum in Washington, DC. In the 45 years since the Trieste was taken out of service, there has not been another manned dive vehicle capable of reaching the floor of the Mariana.

Even today, less than 5% of the Earth’s oceans have been explored by humans, according to the US National Oceanic and Atmosphere Administration. Of course humanity has not entirely abandoned the exploration of the deep. In 1995 a robotic probe did finally revisit the faraway floor of the Mariana trench, as did another such probe in 2009. Though we must not diminish the achievements of those plucky remote-controlled explorers, it seems a shame that no humans have ever attempted to return. There are some people who say that there is little value in sending humans to harsh places where hardier robotic proxies can go in their stead; but for the indefatigable adventurer, that sort of stick-in-the-mud, stay-at-home complacency is unfathomable.

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