 What is the significance of the evidence of human lodging on the islet?
SILENCE IS—DEADLY By Bertrand L. Shurtleff Radio is an absolute necessity in modern organization—and particularly in modern naval organization. [Transcriber's Note: This etext was produced from Astounding Science-Fiction April 1942. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] He moved slowly to the door, paused there, and flung a backward glance at the man in the cabin with him—Zukor Androka, the elderly Czech scientist, a guest of the United States navy, here aboard the cruiser Comerford . Androka had arrived on board the Comerford the day before she sailed from Norfolk. With him came a boatload of scientific apparatus and equipment, including a number of things that looked like oxygen tanks, which were now stored in the forward hold. Androka had watched over his treasures with the jealous care of a mother hen, and spent hours daily in the room in the superstructure that had been assigned as his laboratory. Overhead, the sky was a storm-racked mass of clouds, broken in one spot by a tiny patch of starlit blue. Nelson shouldered his way inside, and stood there in his dripping oilskins, blinking his eyes against the yellow light. Nelson had no answering smile, although there had been a great deal of good-natured joking aboard the Comerford ever since the navy department had sent the scientist on board the cruiser to carry on his experiments. "I'm not sure about my dead reckoning. This storm—" Curtis threw his arm around Nelson's dripping shoulders. "But this storm, sir!" Nelson avoided Curtis' friendly eyes and slipped out from under his arm. There's a chop to the sea—as if from unestimated currents among the islets. In a few minutes he returned and handed Nelson a sheet of paper with figures underlined heavily. Nelson's estimate, I'm checking back," he declared, frowning at the two papers and hastily rechecking his own figures. With all these rocks and islets—" "Radio?" repeated the little Czech, thrusting his face between the other two, in his independent fashion that ignored ship's discipline. Then he hastened to the radio room, with Nelson at his heels, and the Czech trotting along behind. I have shattered them around your ship, just as I can eventually shatter them all over Central Europe!
 Nazis were hiding out there.
 Nazis were hiding out there.  It will give Curtis and his crew mates shelter while they a stranded.  The Americans have outposts everywhere.  The Islet is where the zone of silence is to be built.