Documents filed by a pilot or flight dispatcher with the local Civil Aviation Authority (e.g. FAA in the USA) prior to departure which indicate the plane's planned route or flight path
NOTAMs contain information concerning the establishment, condition or change in any aeronautical facility, service, procedure or hazard, the timely knowledge of which is essential to personnel concerned with flight operations.
En-route (or Enroute) charts provide detailed information useful for instrument flight, including information on radionavigation aids (navaids) such as VORs and NDBs, navigational fixes (waypoints and intersections), standard airways, airport locations, minimum altitudes, and so on. Information not directly relevant to instrument navigation, such as visual landmarks and terrain features, is not included.
En-route charts are divided into high and low versions, with information on airways and navaids for high- and low-altitude flight, respectively. The division between low altitude and high altitude is usually defined as the altitude that marks transition to flight levels (in the United States, this is taken to be 18,000 feet MSL by convention).
Like the VFR sectional charts that they complement, terminal area charts depict topographic features and other information of interest to aviators flying visually, including major landmarks, terrain elevations, visual navigation routes, ground-based navigation aids, airports, rivers, cities, and airspace boundaries. TACs are more detailed than sectional charts, and are scaled at 1:250,000 (as opposed to 1:500,000 for sectional charts) to permit inclusion of more detail. TACs contain information on approach, departure, and transition rules and procedures for the congested Class B areas around major airports.
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