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
Compass Travel Compass Travel Compass Travel is an independent bus and coach operator based in Durrington, West Sussex. Compass Travel operate over 50 bus services throughout Surrey and West Sussex, linking many places other bus companies do not serve. They operate commercial and contracted routes, including route 99, a flexible service between Petworth and Chichester. This service has a fixed route, but will deviate off the route to serve a number of small villages if pre-booked. In addition, a number of Sainsbury's special bus services are run, serving Rustington and Chichester Sainsbury's. Services to Benfield Park Sainsbury's were withdrawn in 2010. In