ground navigation aids meaning in English

地面导航设备

" with the implementation of the ifr procedures , pilots can utilise signals from ground navigation aids and fly along the designated ifr routes even when the visibility precludes visual flights . the regularity of the helicopter service between hong kong and macau is therefore improved , " the spokesman said
他说：仪表飞行规则程序获准使用后，即使能见度低至不可能靠目视飞行，飞行员仍可根据地面导航仪器所发出的信息，以设定的仪表飞行规则路线飞行，令来往港澳之间的直升机服务更有规律。