 What is the significance of the evidence of human lodging on the islet?
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. 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.
 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.