The British merchant steamship SS Mesaba sent a warning radio message to the Titanic on April 15, 1912 while crossing the Atlantic. The message was received by the Titanic but did not reach the main control center of the vessel. 英屬 SS Mesaba 在 1912 年 4/15 有送警告給鐵達尼，然而這封警告信卻沒轉給鐵達尼的主控室。