“But we were discussing the difficulties of establishing the original course constants of a wrecked ship,” the Captain went on, refusing to be sidetracked from his lecture. “First, there is the fact that a detour is frequently necessary to reach the destination system. This is because of pockets of unusual stellar density, black holes and similar normal-space obstructions that cause dangerous areas of distortion in the hyperspace medium, so very few ships are able to reach their destinations in fewer than five Jumps. Second, there are the factors associated with the size of the distressed ship and the number of its hypergenerators. A small vessel with one generator poses fewest problems. But if the ship is similar in mass to ourselves, and we carry a matched pair, or if it is a very large ship requiring four or six hypergenerators… Well, it would then depend on whether the generators went out simultaneously or consecutively.
“Our ships and, presumably, theirs,” Fletcher continued, warming to his subject, “are fitted with safety cutoffs to all generators, should one fail. But those safety devices are not always foolproof, because it takes only a split-second delay in shutting down a generator and the section of the ship structurally associated with it pops into normal space, tearing free of the rest of the vessel and in the process imparting an unbalanced braking motion, which sends the ship spinning off at a tangent to its original course. The shock to the vessel’s structure would probably cause the other generator or generators to fail, and the process would be repeated, so that a series of such events occurring within a few seconds in hyperspace could very well leave the wreckage of the distressed ship strung out across a distance of several light-years. That is the reason why-”
He broke off as an attention signal flashed on his panel. “Astrogation, sir,” Lieutenant Dodds announced briskly. “Five minutes to Jump.”
“Sorry, ma’am,” said the Captain. “We will have to continue this discussion at another time. Power Room, status report, please.”
“Both hypergenerators at optimum, and output matched within the safety limits, sir,” came Chen’s reply.
“Life-support?”
“Systems also optimum,” Chen said. “Artificial gravity on all deck levels at one-G Earth-normal setting. Zero-G in the central well, generator housings and in the Cinrusskin doctor’s quarters.”
“Communications?”
“Still nothing from the hospital, sir,” Haslam replied.
“Very well,” said the Captain. “Power Room, shut down the thrusters, and stand by to abort the Jump until minus one minute.” In an aside to Murchison and Conway he explained: “During the final minute we’re committed to the Jump, whether a signal comes from the hospital or not.”
“Killing thrusters,” said Chen. “Acceleration zero and standing by.”
There was a barely detectable surge as the ship’s acceleration ceased and the one-G was maintained by the deck’s artificial-gravity grids. A display on the Captain’s panel marked off the minutes and the seconds in a silence that was broken only by a quiet sigh from Fletcher as the figures marched into the final minute, then the final thirty seconds.
“Communications, sir!” said Haslam quickly. “Signal from Sector General, amended coordinates for the distress beacon. No other message.”
“They certainly didn’t leave themselves time for a tender farewell,” said the Captain with a nervous laugh. Before he could continue, the Jump gong sounded and the ambulance ship and its occupants moved into a self-created universe where action and reaction were not equal and velocities were not limited to the speed of light.
Instinctively, Conway’s eyes went to the direct-vision port and beyond it to the inner surface of the flickering gray globe that enclosed the ship. At first the surface appeared to be a featureless and absolutely smooth gray barrier, but gradually a sensation of depth, of far too much depth, became apparent and an ache grew behind his eyes as they tried to cope with the twisting, constantly changing gray perspectives.
A maintenance engineer at the hospital had once told him that in hyperspace, material things, whether their atomic or molecular building blocks were arranged into the shapes of people or hardware, had no physical existence; that it was still not clearly understood by the physicists why it was that at the conclusion of a Jump the ship, its equipment and its occupants did not materialize as a homogenous molecular stew. The fact that such a thing had never happened before, as far as the engineer knew, did not mean that it could not happen, and could the doctor suggest a really strong sedative that would keep the engineer non-existently asleep while he was Jumping home on his next leave?