Communications blackout
During war, a communications blackout is the intentional decision, of a military unit, not to use radios; this is done in an attempt to "hide" from the enemy. In telecommunication, the term has the following meanings:
1. A cessation of communications or communications capability caused by a lack of power to a communications facility or equipment.
2. A total lack of communications capability caused by propagation anomalies, e.g., those present during strong auroral activity or during the re-entry of a spacecraft into the Earth's atmosphere.
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