All six of the ice warnings that Titanic has received have been describing a large ice field. Ice is not unheard of in the area that the messages indicate, but the amount of ice that has been spotted is unusual for April. A warm winter has caused excessive melting of the Greenland glaciers. This field of large amounts of broken ice drifts south on the Labrador Current. Even with nearly 40 years of experience at sea, Captain Smith is not aware of the magnitude of this situation. He will follow the standard operating procedure, and maintain Titanic's speed and heading until ice is spotted.
Joshua Allen Milford - Titanic Historian