Radar apparatus, radio navigational aid apparatus and radio remote control apparatus. 雷达设备、无线电导航设备及无线电遥控设备。
A radio navigational aid for determining the distance from a selected DME ground station by measuring the time of transmission to and from it. 飞机上的一种无线电导航设备,通过测量电波往返飞机和预选地面(DME)台之间所需要的时间来确定两者间的距离。
This holiday season will see the debut of a serious competitor to America's Global Positioning System ( GPS ) - the navigational aid used by everyone from car drivers to back-country skiers. 这个假日将会看见美国的全球定位系统(GPS)-从汽车司机到内地滑雪的人任何人使用的定位导航工具的重要竞争者的初次登场。
Holding airspace is usually established over the navigational aid; 等待空域通常划设在导航台上空;
The utility model relates to a free-floating light beacon of navigational aid on water in the sea, a river, or a harbor. 本实用新型是一种海、河港口用水上助航活节式灯桩。