radio beacon 是什么意思

	a radio station that broadcasts a directional signal for navigational purposes 同义词：beacon,
	a characteristic signal emitted by a transmitter used for navigation

	1.	I began to work feverishly on the radio beacons . 我开始拼命地研究无线电信标。
	2.	For some time the german bombers had navigated largely by radio beacons . 有一个时期，德国轰炸机主要是靠无线电定向信标来导航的。
	3.	Satellite emergency position indication radio beacon station 卫星紧急指位无线电信标电台
	4.	Emergency position indicating radio beacons epirbs 无线电紧急定位信标
	5.	The plane homed in on the radio beacon 飞机遵循导航台信号降落。
	6.	Performance requirements and test methods for non - directional radio beacon 无方向信标性能要求和测试方法
	7.	Performance requirement for satellite emergency position indicating radio beacon 卫星应急无线电示位标性能要求
	8.	Ndb non - directional radio beacon 无指向性无线标识
	9.	Omnirange radio beacon 全向式无线电航空信标
	10.	Circular radio beacon 全向无线电信标

radio beacon是什么意思