Incorrect coordinates for FIR SCCZ

Navigation Data General non MSFS data
1

In the SimToolkitPro database, the coordinates for the last waypoint of the FIR/UIR SCCZ appear to be incorrect:

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In the data, the last waypoint has the coordinates -53, -90. Looking at Navigraph Charts, I would have expected -90, -90

2

Hi,
thanks for contacting us, may I ask why do you expect it it? I only see a database record, so what issue has you in STKP exactly now?

Cheers
Richard

3

Here is a drawing of the problem overlaid on the Punta Arenas FIR in Navigraph Charts:

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The coordinates fill the polygon clockwise. 58.35S 53W to 90S -53W is correct. Then it goes straight back to -53S -90W. As you can see, this misses the entire south western corner. The depiction in Navigraph Charts is correct, so this might happen during the translation to the DFD format?

4

Hi,
thanks but this last waypoint is designed as end-waypoint and due special ARINC424 rules it should be go back to the origin waypoint of the sequence. This is what we do in the charts - possible that the addon interpret this line in the wrong way.

But we will report this to our service provider to ask, if this is simple a typo or follow the ARINC rules.

Thank you,
Richard

5

I think I have made a mistake. It just occurred to me, that we are talking about the south pole. The drawing I made assumes a cylindrical projection. But since Earth is a sphere, the longitude does not matter at the poles. I just checked the other FIRs and they are coded the same way.
Iā€™m sorry for the fuss. Thank you for your help!

1 Like
6

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