straight up (or north). However, in navigation, compass headings increase clockwise around the compass face, starting with 0° at the top of the compass (the northerly direction), with 90° to the right (east).

A circle defined parametrically in a positive Cartesian plane by the equations 1=''x'' = cos ''t'' and 1=''y'' = sin ''t'' is traced counterclockwise as the angle t increases in value, from the right-most point