In this case, the airports will typically change the number of the runways by one, even though the actual heading of the runway may be no different! (For example, you would now have runways 8L, 8R, 9L, and 9R that are all parallel. A third runway would cause one to become 9C (center).īut what if there are MORE runways on the same heading? (Such as the 4 at Harstfield-Jackson International Airport in Atlanta?) One becomes runway 9L (left) and the other becomes runway 9R. Now you may ask, what if there are 2 parallel runways? The heading of the runway is rounded and truncated to the first two digits For example, a runway with a heading of 093 degrees becomes runway 9. (Meaning each physical runway is two numbers!) (Note that within the US, we use MAGNETIC heading this is not necessarily the case in other countries! (e.g: Canada, which is closer to the north pole, where they use true north to compensate for compass north being off) Runways are numbered based on compass heading. These are based on the approach direction, so, for example, the runway 35L would be called 17R from the opposite direction. When there is more than one parallel runway at an airport, L, R, or C may be appended to the runway number for Left, Right, or Center. This is not unusual in northern Canada and Greenland. Some runways in areas of large magnetic declination use true instead of magnetic headings for the runway numbers. Occasionally a runway number will change when the magnetic declination angle changes in such amount, making the runway magnetic bearing divided by 10 and rounded to the nearest whole number increase or decrease. If there are two airports near one another with runways at the same angle, sometimes one of the airports will add or subtract one from the runway number to help planes differentiate between the airports. Even though these are the same strip of concrete, they are treated as separate runways by pilots and controllers. A runway with 35 for landings to the north will have runway 17 for landings to the south. Opposite ends of the same runway have different numbers, 18 (which represents 180 degrees) apart.
For example, if the magnetic heading is 345° then 345/10=34,5, so the runway number will be 35 which will be a runway used for landings (and takeoffs) to the north.
Divide its magnetic heading by 10, round it to the nearest whole number and you'll usually get the runway number. Runways are usually numbered according to their direction, more precisely called runway magnetic bearing or QFU ( see Q codes).Ĭonsider a plane flying toward the runway on final approach in a day without any wind.
0 kommentar(er)
