The crew issued a mayday call before diverting the aircraft.

机组人员在转移航道前发出了求救信号。

Authorities were baffled by how a storm could have caused the modern plane operated by three experienced pilots to crash without sending a mayday call.

一场风暴怎么会让由三名经验丰富的飞行员操控的现代化飞机没来得及发出求救呼叫就坠毁，这很让专家们困惑。

Authorities were baffled by how a storm could have caused the modern plane operated by three experienced pilots to crash without sending a mayday call .

一场风暴怎么会让由三名经验丰富的飞行员操控的现代化飞机没来得及发出求救呼叫就坠毁，这很让专家们困惑。

The coastguard received a mayday call at 2 a.m. local time from the cargo carrier ship located 20 miles northwest of the Llyn Peninsula, North Wales, after its hull cracked.

海岸警卫队于当地时间凌晨两点收到一艘离北威尔士丽茵半岛西北方向20英里的货船发来的求救信号。