emergency locator transmitter meaning in English

紧急定位发报机
紧急定位发讯机
紧急定位器发射机
紧急定位信标
事故地点发射机
应急定位发射机
应急定位发射器

Emergency locator transmitter elt
紧急位置发射机
Elt emergency locator transmitter
紧急位置?信器
At the point of the second impact there was much debris from the tail fenestron and the antenna of the automatically deployable emergency locator transmitter ( adelt ) installed at the tail of the helicopter , suggesting a touchdown in a nose high attitude
在第二次撞击地点则发现许多尾旋叶及安装于机尾的自动紧急定位发射器的碎片，显示直升机著地时机头朝上。