Cryptonomicon (136 page)

One day a barge appears off the cove, and there is a lot of fussing around with floats, lots of divers in the water. A backhoe digs a trench in the cobble beach. A long skinny black thing is wrestled ashore. Working almost naked in the tropical heat, the men bolt segmented pipes around it and then bury it. It is never again to be seen by human eyes. Suddenly, all of these men pay their bills and vanish. Not long afterward, the phone service gets a hell of a lot better.

On land, the tools of cable laying are the tools of civil engineers: backhoes, shovels, cranes. The job is a matter of
digging a ditch, laying duct, planting manholes. The complications are sometimes geographical but mostly political. In deep water, where the majority of FLAG is located, the work is done by cable ships and has more in common with space exploration than with any terrestrial activity. These two realms could hardly be more different, and yet the transition between them — the shore landing — is completely distinct from both.

Shallow water is the most perilous part of a cable’s route. Extra precautions must be taken in the transition from deep water to the beach, and these precautions get more extreme as the water gets more shallow. Between 1,000 and 3,000 meters, the cable has a single layer of armor wires (steel rods about as thick as a pencil) around it. In less than 1,000 meters of water, it has a second layer of armor around the first. In the final approach to the shoreline, this double-armored cable is contained within a massive shell of articulated cast-iron pipe, which in turn is buried under up to a meter of sand.

The articulated pipe comes in sections half a meter long, which have to be manually fit around the cable and bolted together. Each section of pipe interlocks with the ones on either end of it. The coupling is designed to bend a certain amount so that the cable can be snaked around any obstructions to its destination: the beach manhole. It will bend only so much, however, so that the cable’s minimum radius of curvature will not be violated.

At the sandy beach this manual work was done out in the surf by a team of English freelance divers based out of Hong Kong. At the cobble beach, it was done in a trench by a bikini-underwear-clad Frenchman with a New Zealand passport living in Singapore, working in Hong Kong, with a Singaporean wife of Chinese descent. Drenched with sweat and rain and seawater, he wrestles with the cast-iron pipe sections in a cobblestone ditch, bolting them patiently together. A Chinese man in a suit
picks his way across the cobbles toward him, carrying an oversized umbrella emblazoned with the logo of a prominent stock brokerage, followed by a minion. Although this is all happening in China, this is the first Chinese person who has appeared on the beach in a couple of days. He is an executive from the phone company, coming to inspect the work. After a stiff exchange of pleasantries with the other cable layers on the beach, he goes to the brink of the trench and begins bossing around the man with the half-pipes, who, knowing what’s good for him, just keeps his mouth shut while maintaining a certain bearing and dignity beside which the executive’s suit and umbrella seem pathetic and vain.

To a hacker tourist, the scene is strikingly familiar: it is the ancient hacker-versus-suit drama, enacted for the millionth time but sticking to its traditional structure as strictly as a Noh play or, for that matter, a Dilbert cartoon. Cable layers, like hackers, scorn credentials, etiquette, and nice clothes. Anyone who can do the work is part of the club. Nothing else matters. Suits are a bizarre intrusion from an irrational world. They have undeniable authority, but heaven only knows how they acquired it. This year, the suits are from Hong Kong, which means they are probably smarter than the average suit. Pretty soon the suits will be from Beijing, but Beijing doesn’t know how to lay cable either, so if they ever want to get bits in or out of their country, they will have to reach an understanding with these guys.

At Tong Fuk, FLAG is encased in pipe out to a distance of some 300 meters from the beach manhole. When the divers have got all of that pipe bolted on, which will take a week or so, they will make their way down the line with a water jet that works by fluidizing the seabed beneath it, turning it into quicksand. The pipe sinks into the quicksand, which eventually compacts, leaving no trace of the buried pipe.

Beyond 300 meters, the cable must still be buried to protect it from anchors, tickler chains, and otter boards (more about this later). This is the job of the two barges we saw off Tong Fuk. One, the
Elbe
, was burying FLAG. The other was burying APCN.
Elbe
did its job in one-third the time, with one-third the crew, perhaps exemplifying the difference between FLAG’s freelance-based virtual-corporation business model versus the old club model. The
Elbe
crew is German, British, Filipino, Singaporean-of-Indian-ancestry, New Zealander, and also includes a South African diver.

In the center of the barge is a tank where the cable is spooled. The thick, heavy armored cable that the
Elbe
works with is covered with a jacket of tarred jute, which gives it an old-fashioned look that belies its high tech optical-fiber innards. The tar likes to melt and stick the cable together, so each layer of cable in the tank is separated from its neighbors by wooden slats, and buckets of talc are slathered over it. The cable emerges from the open top of the tank and passes through a series of rollers that curve around, looking very much like a miniature roller-coaster track — these are built in such a way as to bend the cable through a particular trajectory without violating its minimum radius of curvature. They feed it into the top of the injector unit.

The injector is a huge steel cleaver, 7 meters high and 2 or 3 meters broad, rigged to the side of the barge so it can slide up and down and thus be jammed directly into the seabed. But instead of a cutting blade on its leading edge, it has a row of hardened-steel injector nozzles that spurt highly pressurized water, piped in from a huge pump buried in the
Elbe
’s engine room. These nozzles fluidize the seabed and thus make it possible for the giant blade to penetrate it. Along the trailing edge of the blade runs a channel for the cable so that as the blade works its way forward, the cable is gently laid into the bottom of the slit. The barge carries a set of extensions that can be bolted
onto the top of the injector so it can operate in water as deep as 40 meters, burying the cable as deep as 9 meters beneath the seabed. This sufficed to lay the cable out for a distance of 10 kilometers from Tong Fuk. Later, another barge, the
Chinann
, will come to continue work out to 100 meters deep and will bury both legs of the FLAG cable for another 60 kilometers out to get them through a dangerous anchorage zone.

The
Elbe
has its own tugboat, the
Ocean East
, staffed with an Indonesian crew. Relations between the two vessels have been a bit tense because the Indonesians butchered and ate all of the
Elbe
’s laying hens, terminating the egg supply. But it all seemed to have been patched up when we were there; no one was fretting about it except for the
Elbe
’s rooster. When the
Elbe
is more than half a kilometer from shore,
Ocean East
pulls her along by means of a cable. The tug’s movements are controlled from the
Elbe
’s bridge over a radio link. Closer to shore, the
Elbe
drops an anchor and then pulls itself along by winching the line in. She can get more power by using the Harbormaster thruster units mounted on each of her ends. But the main purpose of these thrusters is to provide side propulsion so the barge’s movements can be finely controlled.

The nerve center of the
Elbe
is a raised, air-conditioned bridge jammed with the electronic paraphernalia characteristic of modern ships, such as a satellite phone, a fax machine, a plotter, and a Navtex machine to receive meteorological updates. Probably the most important equipment is the differential GPS system that tells the barge’s operators exactly where they are with respect to the all-important Route Position List: a series of points provided by the surveyors. Their job is to connect these dots with cable.
Elbe
’s bridge normally sports four different computers all concerned with navigation and station-keeping functions. In addition to this complement, during the Tong Fuk cable lay, Dave Handley was up here with his
laptop, taking down data important to FLAG, while the representatives from AT&T and Cable & Wireless were also present with their laptops compiling their own data.

Hey, wait a minute, the hacker tourist says to himself, I thought AT&T was the enemy. What’s an AT&T guy doing on the bridge of the
Elbe
, side-by-side with Dave Handley?

The answer is that the telecom business is an unfathomably complicated snarl of relationships. Not only did AT&T (along with KDD) end up with the contract to supply FLAG’s cable, it also ended up landing a great deal of the installation work. Not that many companies have what it takes to manage an installation of FLAG’s magnitude. AT&T is one of them and Nynex isn’t. So it frequently happens at FLAG job sites that AT&T will be serving as the contractor, making the local contacts and organizing the work, while FLAG’s presence will be limited to one or two reps whose allegiance is to the investors and whose job it is to make sure it’s all done the FLAG way, as opposed to the AT&T way. As with any other construction project from a doghouse on upward, countless decisions must be made on the site, and here they need to be made the way a group of private investors would make them — not the way a club would.

If FLAG’s investors spent any time at all looking into the history of the cable-laying business, this topic must have given them a few sleepless nights. The early years of the industry were filled with decision making that can most charitably be described as colorful. In those days, there were no experienced old hands. They just made everything up as they went along, and as often as not, they got it wrong.

Thomson and Whitehouse

As of 1861, some 17,500 kilometers of submarine cable had been laid in various places around the world, of which only about 5,000 kilometers worked. The remaining 12,500 kilometers represented a loss to their investors, and most of these lost investments were long cables such as the ones between Britain and the United States and Britain and India (3,500 and 5,600 kilometers, respectively). Understanding why long cables failed was not a trivial problem; it defeated eminent scientists like Rankine and Siemens and was solved, in the end, only by William Thomson.

In prospect, it probably looked like it was going to be easy. Insulated telegraph wires strung from pole to pole worked just as one might expect, and so, assuming that watertight insulation could be found, similar wires laid under the ocean should work just as well. The insulation was soon found in the form of gutta-percha. Very long gutta-percha-insulated wires were built. They worked fine when laid out on the factory floor and tested. But when immersed in water they worked poorly, if at all.

The problem was that water, unlike air, is an electrical conductor, which is to say that charged particles are free to move around in it. When a pulse of electrons moves down an immersed cable, it repels electrons in the surrounding seawater, creating a positively charged pulse in the water outside. These two charged regions interact with each other in such a way as to smear out the original pulse moving down the wire. The operator at the receiving end sees only a slow upward trend in electrical charge, instead of a crisp jump. If the sending operator transmitted the different pulses — the dots and dashes — too close together, they’d blur as they moved down the wire.

Unfortunately, that’s not the only thing happening in that wire. Long cables act as antennae, picking up all kinds of
stray currents as the rotation of the Earth, and its revolution around the sun, sweep them across magnetic fields of terrestrial and celestial origin. At the Museum of Submarine Telegraphy in Porthcurno, Cornwall (which we’ll visit later), is a graph of the so-called Earth current measured in a cable that ran from there to Harbor Grace, Newfoundland, decades ago. Over a period of some 72 hours, the graph showed a variation in the range of 100 volts. Unfortunately, the amplitude of the telegraph signal was only 70 volts. So the weak, smeared-out pulses making their way down the cable would have been almost impossible to hear above the music of the spheres.

Finally, leakage in the cable’s primitive insulation was inevitable. All of these influences, added together, meant that early telegraphers could send anything they wanted into the big wire, but the only thing that showed up at the other end was noise.

These problems were known, but poorly understood, in the mid-1850s when the first transatlantic cable was being planned. They had proved troublesome but manageable in the early cables that bridged short gaps, such as between England and Ireland. No one knew, yet, what would happen in a much longer cable system. The best anyone could do, short of building one, was to make predictions.

The Victorian era was an age of superlatives and larger-than-life characters, and as far as that goes, Dr. Wildman Whitehouse fit right in: what Victoria was to monarchs, Dickens to novelists, Burton to explorers, Robert E. Lee to generals, Dr. Wildman Whitehouse was to assholes. He achieved a level of pure accomplishment in this field that the Alfonse D’Amatos of our time can only dream of. The only 19th-century figure who even comes close to him in this department is Custer. In any case, Dr. Edward Orange Wildman Whitehouse fancied himself something of an expert on electricity. His rival was William Thomson, 10 years younger, a professor of natural philosophy at
Glasgow University who was infatuated with Fourier analysis, a new and extremely powerful tool that happened to be perfectly suited to the problem of how to send electrical pulses down long submarine cables.