Ndb aeronautical radio navigation aids . part 4 : technical requirements for non - directional radio beacon 航空无线电导航设备.第4部分：无方向性信标
Electromagnetic environment requiremets for sea long and middle range radionavigation stations and monitors 对海中远程无线电导航台站电磁环境要求
Electromegnetic environment requirements for sea long and middle range radionavigation stations and monitors 对海中远程无线电导航台站电磁环境要求
Vor aeronautical radio navigation aids . part 2 : technical requirements for very high frequency omnidirectional range 航空无线电导航设备.第2部分：甚高频全向信标
Decca navigator system : receivers for ships - minimum performance standards - methods of testing and required test results 台卡远程连续波相位双曲线无线电导航系统.船用接收机.最少性能标准.试验方法和规定的试验结果
Satellite navigation systems shouldn ’ t be the only way , independent radio area navigation system should be developed with great effort 卫星导航系统不能作为唯一的导航手段,应重视发展自主的陆基区域无线电导航系统。
Radio navigation makes use of wireless wave , which can be divided into land - based and space - based system according to the position of base point 无线电导航是利用无线电电波的波速进行导航的方法，根据导航基点可分为陆基导航和空基导航。
Loran - c wind finding technology : apart from the gps technology , the observatory has been employing the loran - c radio - navigation system in measuring the wind since 1999 除应用gps外，天文台在一九九九年起还使用罗兰- c无线电导航系统来测量高空风。
An emergency radio beacon helped rescue three climbers on mount hood and a big dog kept them warm . the group endured a foul and a cold night before being found 一个无线电导航台帮助救援了三名被困于胡德山的登山者。在被找到之前，这群人靠一条大狗保暖，熬过了一个恶劣、寒冷的夜晚。
An emergency radio beacon helped rescue three climbers on mount hood and a big dog kept them warm . the group endured a foul and a cold night before being found 一个无线电导航台帮助救援了三名被困于胡德山的登山者。他们被发现之前，依靠一只看门狗取暖，熬过了一个恶劣而又寒冷的夜晚。
