sentences:  Just as in the film, the power station is shut down before the submarine sails for home.During Lt. Sunderstrom's search in the film for the signals' author, he is given just one hour, while in the novel, he is given two hours to find the source.Just like the novel, Sunderstrom's radiation suit doesn't have a wrist watch to help him keep track of his time ashore, so the submarine crew alerts him with horn blasts every quarter of an hour.