C.Q.D. signals that meant safety to two thousand souls: the means by which the sinking liner Republic sent three hundred miles for immediate help. RMS Republic sank on 24rd January 1909, near Nantucket, Massachusetts, after collision with SS Florida had occurred the day before. Republic was issued with the new Marconi wireless telegraph system and became the first ever ship to issue a CQD (Come Quickly, Danger) distress signal, when Jack Binns, the wireless-telegraph operator, transmitted the message for fourteen hours straight amidst the wreck of the wireless office. The images on this page include listening for signals from the submarine bells of other vessels; the electric bell which sends signal sound-waves underwater; a Marconi station; RMS Republic itself; electric bell used for land stations; tank that houses the telephone-receiver; and types of floating receivers for the submarine bell-signal.