Search results
Results from the WOW.Com Content Network
Ultralight vehicles may be operated during the twilight periods 30 minutes before official sunrise and 30 minutes after official sunset or, in Alaska, during the period of civil twilight as defined in the Air Almanac, if: The vehicle has an operating anti-collision light visible for at least 3 statute miles [1]
Anchorage has a frost-free growing season that averages slightly over one hundred days. Average January low and high temperatures at Ted Stevens Anchorage International Airport (PANC) are 11 / 23 °F (−11.7 / −5.0 °C) with an average winter snowfall of 75.59 inches, or 1.92 meters.
Three different concepts of "night" are referred to in the Federal Aviation Regulations in the US. These include the periods from sunset to sunrise - used for nav lights,; the end of evening civil twilight to the beginning of morning civil twilight (this is the "standard definition of night", given in FAR Section 1.1) - used for logging night flight,
Midtown Manhattan during civil twilight, demonstrating blue hour. Civil twilight is the period of time for which the geometric center of the Sun is between the horizon and 6° below the horizon. [3] [4] [5] Civil twilight is the period when enough natural light remains so that artificial light in towns and cities is not needed.
Commercial aircraft from civil airlines were used for the transportation of U.S. troops. The United States Department of Defense awarded the charter contracts through public tenders. Capitol International Airways had been awarded the contract to transport military personnel on behalf of the Military Airlift Command from McChord Air Force Base ...
The "Air Almanac" of the United States and Great Britain tabulates celestial coordinates for 10-minute intervals for use in aerial navigation. The Sokkia Corporation's annual "Celestial Observation Handbook and Ephemeris" tabulated daily celestial coordinates (to a tenth of an arcsecond) for the Sun and nine stars; it was last published for 2008.
Apr. 6—Anchorage is edging ever closer to a seasonal snowfall record that's now less than 5 inches away. By Friday, this winter's total snowfall at the National Weather Service offices on Sand ...
NAVEPHM implements a procedure for the determination of the position of the Sun, Moon and navigational planets that reproduce 'The Nautical Almanac' and 'The Air Almanac' to within 0.2'. Keywords include: Navigation, Air Almanac, Ephemeris, Spheroid Earth, Spherical Triangle, Almanac, Nautical Almanac, Great Circle, Rhumb Line, and General ...