| NOUN | act | electronic warfare-support measures, ESM | electronic warfare undertaken under direct control of an operational commander to locate sources of radiated electromagnetic energy for the purpose of immediate threat recognition |
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| Meaning | electronic warfare undertaken under direct control of an operational commander to locate sources of radiated electromagnetic energy for the purpose of immediate threat recognition. | |
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| Synonym | ESM | |
| Broader | electronic warfare, EW | military action involving the use of electromagnetic energy to determine or exploit or reduce or prevent hostile use of the electromagnetic spectrum |
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