Distress frequency definitions

distress frequency

frequency internationally assigned for distress, urgency or for safety purposes
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=713-03-20

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distress frequency

a radio frequency band reserved for emergency signals from aircraft or ships in distress.
Found on https://www.infoplease.com/dictionary/distress-frequency

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