scrum

8th Sep 2023, 03:01

I've always been under the impression that the ICAO aiming point markings on a runway longer than 2400 m were situated 400 m (1312 feet) beyond the runway threshold. However, I have since found that this is not always the case. I primarily operate in Australia and have noticed a signficant variance in where these markings are situated. For example, at YSSY I measured the distances from threshold to the beginning of the aiming point markings using Google Earth as follows:

16R - 400 m

34L - 400 m

07 - 430 m

25 - 450 m

16L - 340 m

34R - 340 m

At YMML I measured as follows:

34 - 400 m

16 - 560 m

Why is there such a variance and if pilots are using the aiming points for their touchdown point does this throw their landing distance calculations out of the window?

16R - 400 m

34L - 400 m

07 - 430 m

25 - 450 m

16L - 340 m

34R - 340 m

At YMML I measured as follows:

34 - 400 m

16 - 560 m

Why is there such a variance and if pilots are using the aiming points for their touchdown point does this throw their landing distance calculations out of the window?