"I see. Suppose, then, that all atomics aboard were to be shut down; that for the necessary heat and light we use electricity, from storage or primary batteries or from a generator driven by an internal-combustion motor or a heat-engine. Could the range of detection then be increased?"
"Tremendously, sir. My guess is that the limiting factor would then be the cosmics."
"I hope you're right. While you are waiting for the next signal to come in, you might work out a preliminary design for such a detector. If, as I anticipate, this Zabriska proves to be a dead end, Operation Zabriska ends here—becomes a part of Zwilnik—and you two will follow me at max to Tellus. You, Jack, are very badly needed on Operation Boskone. You and I, Mase, will make appropriate alterations aboard a J-class vessel of the Patrol."
[CHAPTER 12]
Approaching Cavenda in his dead-black, converted scout-ship, Virgil Samms cut his drive, killed his atomics, and turned on his super-powered detectors. For five full detets in every direction—throughout a spherical volume over ten detets in diameter—space was void of ships. Some activity was apparent upon the planet dead ahead, but the First Lensman did not worry about that. The drug-runners would of course have atomics in their plants, even if there were no space-ships actually on the planet—which there probably were. What he did worry about was detection. There would be plenty of detectors, probably automatic; not only ordinary sub-ethereals, but electros and radars as well.
He flashed up to within one and a quarter detets, stopped, and checked again. Space was still empty. Then, after making a series of observations, he went inert and established an intrinsic velocity which, he hoped, would be close enough. He again shut off his atomics and started the sixteen-cylinder Diesel engine which would do its best to replace them.
That best was none too good, but it would do. Besides driving the Bergenholm it could furnish enough kilodynes of thrust to produce a velocity many times greater than any attainable by inert matter. It used a lot of oxygen per minute, but it would not run for very many minutes. With her atomics out of action his ship would not register upon the plates of the long-range detectors universally used. Since she was nevertheless traveling faster than light, neither electromagnetic detector-webs nor radar could "see" her. Good enough.
Samms was not the System's best computer, nor did he have the System's finest instruments. His positional error could be corrected easily enough; but as he drove nearer and nearer to Cavenda, keeping, toward the last, in line with its one small moon, he wondered more and more as to how much of an allowance he should make for error in his intrinsic, which he had set up practically by guess. And there was another variable, the cut-off. He slowed down to just over one light; but even at that comparatively slow speed an error of one millisecond at cut-off meant a displacement of two hundred miles! He switched the spotter into the Berg's cut-off circuit, set it for three hundred miles, and waited tensely at his controls.
The relays clicked, the driving force expired, the vessel went inert. Samms' eyes, flashing from instrument to instrument, told him that matters could have been worse. His intrinsic was neither straight up, as he had hoped, nor straight down, as he had feared, but almost exactly half-way between the two—straight out. He discovered that fact just in time; in another second or two he would have been out beyond the moon's protecting bulk and thus detectable from Cavenda. He went free, flashed back to the opposite boundary of his area of safety, went inert, and put the full power of the bellowing Diesel to the task of bucking down his erroneous intrinsic, losing altitude continuously. Again and again he repeated the maneuver; and thus, grimly and stubbornly, he fought his ship to ground.