begin morning nautical twilight Thestartofthatperiodwhere,ingoodconditionsandintheabsenceofotherillumination,enoughlightisavailabletoidentifythegeneraloutlinesofgroundobjectsandconductlimitedmilitaryoperations.Lightintensificationdevicesarestilleffectiveandmayhaveenhancedcapabilities.Atthistime,thesunis 12degreesbelowtheeaster...
We entered and was given free popcorn and soda. It was a very well-made movie about theHistory of The Making of the Panama Canal.The Panama Canal was constructed at the Isthmus of Panama in order to save ships from going around Cape Horn in South America, saving 8,000 nautical miles. ...
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...