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Runway Aiming Point Markings

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Runway Aiming Point Markings

Old 8th Sep 2023, 03:01
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Runway Aiming Point Markings

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?
scrum is offline  
Old 8th Sep 2023, 07:43
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According to Annex 14, some variations around 400 m are allowed.

5.2.5 Aiming point marking
Location The aiming point marking shall commence no closer to the threshold than the distance indicated in the appropriate column of Table 5-1, except that, on a runway equipped with a visual approach slope indicator system, the beginning of the marking shall be coincident with the visual approach slope origin.

And regarding performance - there is another thread related to that issue:
Touchdown point
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Old 8th Sep 2023, 08:13
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Many thanks!
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Old 13th Sep 2023, 01:52
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BTW, in the nonstandard ICAO USA, the box starts at 1,000’. I remember the C/T squad in the Fragrant Harbour couldn’t wrap their heads around this fact and erroneously wrote pilots up for landing long in Anchorage.
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