end of evening nautical twilight

end of evening nautical twilight
Occurs when the sun has dropped 12 degrees below the western horizon, and is the instant of last available daylight for the visual control of limited ground operations. At end of evening nautical twilight there is no further sunlight available. See also horizon.

Military dictionary. 2000.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Twilight — For other uses, see Twilight (disambiguation). Twilight at Riga Bridge …   Wikipedia

  • twilight — The period of incomplete darkness following sunset and preceding sunrise. Twilight is designated as civil, nautical, or astronomical, as the darker limit occurs when the center of the sun is 6°, 12°, and 18°, respectively, below the celestial… …   Aviation dictionary

  • Сумерки — У этого термина существуют и другие значения, см. Сумерки (значения) …   Википедия

  • Aberdeen — City redirects here. For other uses see Aberdeen (disambiguation) and Aberdeen City (disambiguation). Coordinates: 57°09′09″N 2°06′36″W / 57.1526°N 2.1100°W …   Wikipedia

  • Geography in medieval Islam — Islamic geography includes the advancement of geography, cartography and earth sciences under various Islamic civilizations. During the medieval ages, Islamic geography was driven by a number of factors: the Islamic Golden Age, parallel… …   Wikipedia

  • performing arts — arts or skills that require public performance, as acting, singing, or dancing. [1945 50] * * * ▪ 2009 Introduction Music Classical.       The last vestiges of the Cold War seemed to thaw for a moment on Feb. 26, 2008, when the unfamiliar strains …   Universalium

  • education — /ej oo kay sheuhn/, n. 1. the act or process of imparting or acquiring general knowledge, developing the powers of reasoning and judgment, and generally of preparing oneself or others intellectually for mature life. 2. the act or process of… …   Universalium

  • Arthur Sullivan — This article is about the composer. For the Australian soldier decorated with the VC, see Arthur Percy Sullivan. Arthur …   Wikipedia

  • Intercept method — The Intercept Method , or Marcq St Hilaire method , as it is also rather inaccurately known, is an astronomical navigation method of calculating an observer s position on earth. It was originally called the azimuth intercept method because the… …   Wikipedia

  • War of 1812 — This article is about the Anglo American War of 1812 to 1815. For other wars in 1812, see War of 1812 (disambiguation). War of 1812 The unfinished United States Capitol after the burning of Washington. Watercolor and i …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”