2001_ A Space Odyssey - Arthur C. Clarke [47]
“Apart from this minor problem, the mission is still going uneventfully and should continue in the same manner.
“Mission Control, this is X-ray-Delta-One, two-one-zero-four, transmission concluded.”
Chapter 22
Excursion
Discovery’s extravehicular capsules or “space pods” were spheres about nine feet in diameter, and the operator sat behind a bay window which gave him a splendid view. The main rocket drive produced an acceleration of one-fifth of a gravity — just sufficient to hover on the Moon — while small attitude-control nozzles allowed for steering. From an area immediately beneath the bay window sprouted two sets of articulated metal arms or “waldoes,” one for heavy duty, the other for delicate manipulation. There was also an extensible turret carrying a variety of power tools, such as screwdrivers, jackhammers, saws, and drills.
Space pods were not the most elegant means of transport devised by man, but they were absolutely essential for construction and maintenance work in vacuum. They were usually christened with feminine names, perhaps in recognition of the fact that their personalities were sometimes slightly unpredictable. Discovery’s trio were Anna, Betty, and Clara.
Once he had put on his personal pressure suit — his last line of defense — and climbed inside the pod, Poole spent ten minutes carefully checking the controls. He burped the steering jets, flexed the waldoes, reconfirmed oxygen, fuel, power reserve. Then, when he was completely satisfied, he spoke to Hal over the radio circuit. Though Bowman was standing by on the control deck, he would not interfere unless there was some obvious mistake or malfunction.
“This is Betty. Start pumping sequence.”
“Pumping sequence started,” repeated Hal. At once, Poole could hear the throbbing of the pumps as precious air was sucked out of the lock chamber. Presently, the thin metal of the pod’s external shell made crinkling, crackling noises, then, after about five minutes, Hal reported:
“Pumping sequence concluded.”
Poole made a final check of his tiny instrument panel. Everything was perfectly normal.
“Open outer door,” he ordered.
Again Hal repeated his instructions; at any stage, Poole had only to call “Hold!” and the computer would stop the sequence immediately.
Ahead, the walls of the ship slid apart. Poole felt the pod rock briefly as the last thin traces of air rushed into space. Then he was looking out at the stars — and, as it happened, at the tiny, golden disk of Saturn, still four hundred million miles away.
“Commence pod ejection.”
Very slowly, the rail from which the pod was hanging extended itself out through the open door until the vehicle was suspended just beyond the hull of the ship.
Poole gave a half-second burst on the main jet and the pod slid gently off the rail, becoming at last an independent vehicle pursuing its own orbit around the Sun. He now had no connection with Discovery — not even a safety line. The pods seldom gave trouble; and even if he got stranded, Bowman could easily come and rescue him.
Betty responded smoothly to the control; he let her drift outward for a hundred feet, then checked her forward momentum and spun her round so that he was looking back at the ship. Then he began his tour of the pressure hull.
His first target was a fused area about half an inch across, with a tiny central crater. The particle of dust that had impacted here at over a hundred thousand miles an hour was certainly smaller than a pinhead, and its enormous kinetic energy had vaporized it instantly. ‘ As was often the case, the crater looked as if it had been caused by an explosion from inside the ship; at these velocities, materials behaved in strange ways and the laws of commonsense mechanics seldom applied.
Poole examined the area carefully, then sprayed it with sealant from a pressurized container