off the beam meaning in Chinese

方向错误的

脱离航向, 错

正横

• off:    adv. 1.〔运动〕向那边，隔开。 be off 走， ...
• beam:    n. 1.梁，栋梁，桁条；(船的)横梁。 2.船幅；(动 ...

Examples

1. A radio signal tells the pilot of an airplane when his plane is off the beam
   飞机脱离航道时，会有一个无线电信号告诉驾驶员。