RMS Republic, a passenger ship of the White Star Line, becomes the first ship to use the CQD distress signal after colliding with another ship, the SS Florida, off the Massachusetts coastline, an event that kills six people. The Republic sinks the next day.

RMS Republic was a steam-powered ocean liner built in 1903 by Harland and Wolff in Belfast, and lost at sea in a collision in 1909 while sailing for the White Star Line. The ship was equipped with a new Marconi wireless telegraphy transmitter, and issued a CQD distress call, resulting in the saving…