youdao

Any distress vessel in the all sea areas may use DSC device working on different frequency to send distress alert.

在各海区的遇险船舶均可使用不同频率的DSC设备进行遇险报警。

youdao

More parts are coming with radio frequency ID (RFID) tags to automatically alert airlines and manufacturers of a problem.

FORBES: Here's Why I'm Grateful Microsoft Doesn't Build Airplanes

If there is still no response, a distress alert will be transmitted on the emergency frequency to the nearest coastguard and nearby shipping.

BBC: Alan Rankin on his yacht Trade Winds