What does runway 3 mean?

Plainly put, airport runways are numbered according to compass bearings. This means runway numbers are based on the compass with 360 representing north, 90 representing east, 180 representing south, and 270 representing west. Runways are numbered between 01 and 36. Aerial view of a numbered airport runway.



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All runways are numbered. The number used corresponds to the magnetic direction of that runway when landing or taking off on it. The runway number is abbreviated and missing the last digit. As an example. If you are landing or taking off on runway 20, it is actually 200°

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“27” requires a heading of 270 degrees (due west, as it turns out). If there are two parallel runways, they become left and right (or “L” and “R”). “27R” is the rightmost of two runways which both require an approach at 270 degrees.

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Advertisement. The first digit in the number uses the actual bearing and the second digit is rounded off to the nearest degrees. The last number in the degree is always dropped. Advertisement. So if a runway number is 27, it means that the direction of the runway is 270-degrees from North.

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For example, Runway 9-27 is oriented east-west. You might be thinking that the numbers on this diagram are backwards. On a handheld compass, south is 180 degrees (so 18 in runway terms) and west is 270 (27). But the “W” is numbered 9 because the runway number is connected to the direction the plane is traveling.

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Runways are named by a number between 01 and 36, which is generally the magnetic azimuth of the runway's heading in decadegrees. This heading differs from true north by the local magnetic declination.

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Runway numbers are actually a reference to the closest magnetic heading of the runway. The runway heading is rounded to the nearest 10 degrees, and the zero is removed. This number is then assigned to the runway. Further differentiation can be achieved with letters on parallel runways.

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A: The runway number is the approximate magnetic heading. As an example, runway 35 is pointing approximately 350 degrees magnetic. The opposite end of the runway is 17 or approximately 170 degrees magnetic.

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For example, if the magnetic heading of a runway is 233°, it is designated Runway 23. If the magnetic heading changes downwards by 5 degrees to 228°, the runway remains Runway 23.

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A runway always has a number between 1 and 36, and that number isn't just the runway's nickname, but also indicates how many degrees away that runway is from magnetic north, rounded to the tens. So runway 24 is 240 degrees from magnetic north, and runway 36 runs right along it.

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As runways can be used in two directions, which are 180° apart, they have two numbers that indicate both, with a difference that is always 18. That's why runway 02 is also runway 20 in the opposite direction, and runway 07 is also runway 25.

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Generally, a typical runway length for a fully loaded Boeing 747-400, one of the most common variants, is around 10,000 to 12,000 feet (3,048 to 3,658 meters) for takeoff.

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Is There a Runway 0? You shouldn't find any runway numbered either “0” or “00”. Any runway which points to magnetic north will normally be given the designator “36” (as in 360 degrees). This will also correspond with the headings read out by both ATC and the pilot.

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