along the extended centre line of runway end

about 1 km. ahead of the runway threshold

at the runway threshold

about 7 km. ahead of the runway threshold

22.5 m x 22.5 m

30 m x 30 m

22.5 m x 30 m

60 mx 120 m

2.5 m

5.0 m

7.5 m

10.0 m

1:02

1:05

1:08

1:40

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is not the correct explanation of A

A is true but R is false

A is false but R is true