What are icebergs?
Icebergs are detached masses of glacier which subside into the sea and float as wind or current may take them. About one-ninth of an iceberg is above sea level. The North Atlantic is the chief home of icebergs, which reach the ocean from the ice-clad plateaux of Greenland. Some of these floating masses of ice are of enormous proportions and constitute in the spring and early summer seasons a great menace to the safety of ships, as was disastrously shown in the Titanic catastrophe of 1912.