Unknown Definition - MilitaryDictionary.org
1.) An unidentified target. An aircraft or ship that has not been determined to be hostile, friendly, or neutral using identification friend or foe and other techniques, but that must be tracked by air defense or naval engagement systems.
2.) A code meaning "information not available."
3.) An identity applied to an evaluated track that has not been identified.
In the United States, military vocabulary is standardized by the Department of Defence. These terms are used by the United States Army, Navy, Air Force, and Marine Corps.
Term Classification: operations
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