Compass has a half-life of only about 12 years, so a compass that contains 120 mCi of tritium when new will contain only 60 when it is 12 years old, 30 when it is 24 years old, and so on. Consequently, the illumination of the display will fade. Mariners' compasses can have two or more magnets permanently attached to a compass card, which moves freely on a pivot. A "lubber line", which can be a marking on the compass bowl or a small fixed needle, indicates the ship's heading on the compass card. Traditionally the card is divided into thirty-two points
The Broken Compass Continuum, with the altered subtitle "How Left and Right Lost Their Meaning". In anticipation of the 2010 general election, a revised paperback edition with the new title "The Cameron Delusion" was released in the UK on 17 March 2010. Poole in his "Guardian" review wrote that "Hitchens should at least be applauded for taking the trouble to provide an amusing index, a duty shirked by too many authors." The index was the subject of a full-page parody by Craig Brown in the magazine "Private Eye". The Broken Compass The Broken Compass: How British Politics Lost its Way is the fourth