Page 84 - PPL-engelsk 2025

Air Law

Runways have numbers, which are derived by taking the magnetic direction of

the runway and dividing it by 10.

Runway numbers must always consist of 2 digits, so when the result gives only

one digit, a zero is placed in front of that digit. The number is rounded to the

nearest whole number.

For parallel runways, one is called, e.g. runway 09R (right). This means that to

the north of this runway, on the left side, there will be a runway called 09L (left).

To prevent sand blowing at the end of the runway when jet aircraft take off,

asphalt has been laid a distance before the runway begins. If you need to abort

a takeoff and brake the aircraft when starting from runway 27L, the area with

white arrows can be used (see illustration below).

This area is called the "stopway" or "overrun." The area with yellow "chevrons"

(arrows) is called the "clearway" and can be used as an obstruction-free climb

area. However, when starting from runway 09, which must happen before the

threshold, the area with yellow chevrons is often designed as "Blast Pads" to

prevent the blast (jet stream) from large aircraft from blowing away the

surface.

1.5.7.2 Runway lengths – available distances

On the airport map (see 1.5.5.4), you could see

various terms related to available distances.

Here’s an explanation of those terms:
- TORA: Takeoff Run Available

- TODA: Takeoff Distance Available to 35 ft

- LDA: Landing Distance Available

- ASDA: Accelerate-Stop Distance Available for aborted takeoffs

Flight Theory PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 84