 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. 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. For the next two hours, no radio messages can enter or leave my zone of radio silence—of refracted radio waves, set up by my little station on one of the neighboring islets!" "And if the Nazi agents in America knew of the islet from which my zone of silence is projected—" Androka paused, his head tilted to one side, as if he were listening to something— On deck, there was shouting and commotion.
 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.