MS of man talking into radio microphone, stack of machines in front of him, big clock behind him. Cloudy sky, moving. Shot from an oil tanker out on the sea, front of ship takes up most of shot. Man tapping out Morse code. Freighter out on the sea, side view. Man in military garb tapping out Morse code. Shot from plane in midair - rotating propeller, big clouds. LS side view of passenger liner on the sea. Man in military garb tapping out Morse code. Side view of lightship on the sea, with “San Francisco” written on side. Darkly lit shot of big steering wheel. Head on shot of machine tapping out coded message. LS of small island shrouded in mist. Two angles, LS & MS of man talking on the phone at his small desk. Profile MS of man at tilted desk pulling off a sheet of messages and looking it over. Over the shoulder of a man drawing lines on a map. More map shots, with arrows on it. Profile MCU of a man reading into a microphone. CU of rotating circular tube communication device. Profile MS of man reading into short wave radio. Lines of customers at “United” airline counter; employee carrying suitcases walking by.