What are these blue lines around the runway at the airport chart that I marked with red lines? They are not waterways or taxiways so what are they?
Yenisehir Airport (LTBR):
Adana International Airport (LTAF):
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1$\begingroup$ what airport is this? $\endgroup$– user22445Commented Oct 7, 2022 at 14:55
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$\begingroup$ Adana International Airport and Yenisehir Airport from Turkey. I've seen these blue lines several times on different charts. LTAF and LTBR btw. $\endgroup$– pilot162Commented Oct 7, 2022 at 15:02
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1$\begingroup$ And this is why you have to look out the windows when flying IFR. A glance a reality can tell you what charts & instruments won't. $\endgroup$– FreeManCommented Oct 7, 2022 at 16:25
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1 Answer
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They are in fact waterways: irrigation ditches or channels. The Jeppesen airport chart legend lists them as
32 — Ditches in the vicinity of the airport are depicted.
For example, looking at a Google Maps view of LTBR, the blue line charted west of the runways clearly refers to the Kurutma Kanali/Marmaracık Gölü Kurutma Kanali. The blue lines between the runways are not shown on the Google Maps terrain/relief view, but switching to the aerial imagery view reveals a drainage ditch on either side of Runway 07L. In fact there appears to be another one which Jeppesen does not depict on the south side of Runway 07R.
answered Oct 7, 2022 at 16:57
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$\begingroup$ Thank you so much for your answer. Actually, the reason why I asked the question was the blue line between the runways, because there was nothing like a waterway between the runways while flying at that airport. But as a result, as you said, it becomes clearer when you check it from Google maps. $\endgroup$– pilot162Commented Oct 7, 2022 at 18:00