 What is Androka’s motivation for using the zone of silence?
SILENCE IS—DEADLY By Bertrand L. Shurtleff Radio is an absolute necessity in modern organization—and particularly in modern naval organization. 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. Sometimes, Curtis thought old Androka was a bit wacky—a scientist whose mind had been turned by the horror that had come to his country under the domination of the Nazi gestapo . Overhead, the sky was a storm-racked mass of clouds, broken in one spot by a tiny patch of starlit blue. Curtis closed the door and nodded toward the bent form of Zukor Androka, with a quizzical grin. 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. "Not that I've lost confidence in you, Nels, but just because you asked for it!" 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. It will be no more than Hitler can get when Zukor Androka decrees silence over the German airways! Then he hastened to the radio room, with Nelson at his heels, and the Czech trotting along behind. Went out on me about five minutes ago. Again and again, he sent off a request for a cross-bearing from shore stations that had recently been established to insure safety to naval vessels, but there was no answer on any of the bands—not even the blare of a high-powered commercial program in the higher reach, nor the chatter of ships or amateurs on the shorter. I have shattered them around your ship, just as I can eventually shatter them all over Central Europe!
 He is helping the Nazi war effort
 He is helping the Nazi war effort  He is helping the American Navy.  He is doing Bob Curtis a favor by helping his ship be the most successful in the Navy.  He is planning revenge against the Nazis for harming his family.