Begin Morning Nautical Twilight Definition - MilitaryDictionary.org

begin morning nautical twilight

1.) The start of that period where, in good conditions and in the absence of other illumination, the sun is 12 degrees below the eastern horizon and enough light is available to identify the general outlines of ground objects and conduct limited military operations.

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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: intelligence

Source:

Department of Defence, Dictionary of Military and Associated Terms

Term sourced from JP 2-01.3: Joint Intelligence Preparation of the Operational Environment, updated May 2014

This term is marked as active and was last updated in 2015


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