A compass is an instrument used for navigation and orientation that shows direction relative to the geographic cardinal directions (or points). Usually, a diagram called a compass rose shows the directions north, south, east, and west on the compass face as abbreviated initials. When the compass is used, the rose can be aligned with the corresponding geographic directions; for example, the "N" mark on the rose points northward. Compasses often display markings for angles in degrees in addition to (or sometimes instead of) the rose. North corresponds to 0°, and the angles increase clockwise, so east is 90° degrees, south is 180°, and west is 270°. These numbers allow the compass to show azimuths or bearings, which are commonly stated in this notation
罗盘是用于导航和定向的仪器,显示方向相对于所述地理基本方向(或点)。通常情况下,一个图称为罗盘显示方向北,南,东,西罗盘脸缩写的首字母。当使用罗盘,玫瑰可以与相应的地理方向对准;例如,在玫瑰的“N”标记指向北方。圆规经常用于在除了度的角度(或有时代替)玫瑰显示标记。北对应于0°,并且角度顺时针增加,所以东面是90°度,南为180°,和西是270°。这些数字让罗盘显示方位和轴承,它们在这个符号通常表示