due north
正北
例句与用法：
The cardinal point on the mariner's compass90= clockwise from due north and directly opposite west.
东方航海罗盘上一个基本方位，正北方向顺时钟转90°或指正西的相反方向
The direction or point on the mariner's compass halfway between due north and due east, or45= east of due north.
东北水手罗盘上的方向或点，在正北与正东中间，或正北偏东45度
The course of the ship was due north.
这条船的航行方向是正北。