begin morning civil twilight

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begin morning civil twilight

The period of time at which the sun is halfway between beginning morning and nautical twilight and sunrise, when there is enough light to see objects clearly with the unaided eye. At this time, light intensification devices are no longer effective, and the sun is six degrees below the eastern horizon. Also called BMCT.
References in periodicals archive ?
The BMCT was used to score the teams' performances during the Respiratory and the Circulatory scenarios.
We used the money from the BMCT to hold parties for the children at Christmas time, we had face painting and balloon making, something to brighten up the lives of the children who are going through a very difficult time.
At this time BMCT will operate a total of 36 Konecranes Noell RTG cranes and 4 Konecranes Noell RMG cranes.
BMCT fundraising manager Gordon Creese said: "The Charity Trust is looking forward to working with the Malmaison and its staff to raise money for much needed funds for good causes.
Gordon Creese, fundraising manager for the BMCT, said: "We are very excited about the partnership between the Birmingham Mail Charity Trust and TLC Lottery.
To find out more about the BMCT, contact fund-raising manager Gordon Creese on 0121 234 5639 or email gordon.
The grant from the BMCT takes us a step nearer to achieving our target.