automatic-alarm-signal keying device

automatic-alarm-signal keying device

[¦ȯd·ə¦mad·ik ə′lärm ‚sig·nəl ′kē·iŋ di‚vīs]
(communications)
A device capable of automatically keying the radiotelegraph transmitter on board a vessel to transmit the international automatic-alarm signal, or to respond to receipt of an internationally agreed-upon distress signal and wake up the radio operator on ships not having a 24-hour radio watch.
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