True bearing

A true bearing is the direction of an object measured clockwise from true north through 360 degrees. It is the bearing plotted on the chart, derived from a compass bearing by applying compass error: true bearing equals compass bearing plus easterly compass error, minus westerly. Bearings of two or more charted objects cross to give a fix, and a single bearing plus a run gives a transferred position line. A radio or direction-finding bearing is a great-circle direction and needs the half-convergency correction before it can be plotted as a true rhumb bearing. Gyro bearings need only the gyro error applied.