In aviation, some possibly unmanned airports have equipment that let pilots key their VHF radio a number of times in order to request an Automatic Terminal Information Service broadcast, or turn on runway lights.
在航空領域，一些可能無人駕駛的機場擁有允許飛行員多次鍵入其VHF無線電以便請求自動終端信息服務廣播或打開跑道燈的設備。