Aviation Dictionary
The dictionary posted here is a tool for our visitors to better understand some of the terms used in Aviation and Aircraft Maintenance. This dictionary will continue to grow over time and will be integrated throughout our website for better usability and convenience.
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Definition of Civil Twilight | | Civil twilight is defined to begin in the morning, and to end in the evening when the center of the Sun is geometrically six degrees below the horizon.
For More Information: http://aa.usno.navy.mil/faq/docs/RST_defs.html#top |
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