From Where The Distress Signals Were Sent

Pictured here is the communications room aboard the Titanic where radio operators Harold Bride and Jack Phillips sent out distress signals to get help for the sinking vessel. They worked for the Marconi Company, which made the wireless telegraph used on the ship.

The telegraph is an invention similar to the telephone. The main difference is that the former is an apparatus used for communicating through codes instead of two-way talking. Bride and Phillips radioed the code CQD for two hours, and then the newer one, SOS, not knowing that help was already on the way.