Because ice is slightly less dense than water about one ninth of the total mass of a berg projects above the water. Greenland is the source of most of the icebergs in the N Atlantic, where the iceberg season lasts roughly from February to October. As a consequence of the loss of the Titanic through collision with an iceberg in 1912, a patrol of N Atlantic shipping channels was initiated in 1914 by the international agreement of 16 nations.
Patrols use planes and surface vessels equipped with radar, loran, and underwater sound equipment.
A constant census of bergs is maintained, and the location of an iceberg is reported to any ship in its vicinity. Get quality answers at the right price. Listing from Electric Library , a pay service. Copyright 2001 Infonautics Corporation . All rights reserved.