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What is a runway designator? (Purpose and markings)

a) It indicates the airport's location on a map.
b) It marks the taxiway for aircraft parking.
c) It identifies the runway's direction and magnetic heading.
d) It specifies the airline operating the runway.

Answer :

Final answer:

A runway designator identifies the runway's direction and magnetic heading, not the airport's location on a map, marks for aircraft parking, or specifies airline operation. It includes numerical and sometimes alphabetical characters that correspond to the runway's magnetic bearing.

Explanation:

A runway designator is a unique identifier for runways at airports around the world. It serves a very specific purpose: it identifies the runway's direction and magnetic heading. Specifically, a runway designator consists of numbers and sometimes a letter, where the numbers correspond to the magnetic azimuth (compass bearing) rounded to the nearest 10 degrees and divided by 10, giving the direction the runway faces. The letter, when present, differentiates between left (L), right (R), or center (C) when there are parallel runways. For example, a runway labeled as 09L indicates a magnetic heading of approximately 90 degrees and is the left runway if more than one exists.

Runway markings are visual aids that provide essential information to pilots during takeoff and landing. They include the runway designator as well as centerlines, threshold markings, and touchdown zones, among others, all of which assist in safely guiding aircrafts during these critical phases of flight.

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