It seems like the frequencies on the ground charts for EKCH are wrong. They state 121.730 as the primary frequency. In fact this is a quite seldomly used frequency, and the one missing would be 121.630 which is the main arrival frequency for Apron.
121.73 is a secondary frequency only used when using 4 controllers on the job splitting 121.905 and 121.730 between two controllers. A quite rare occurrence.
Is this fixable as it would be quite useful for us on VATSIM who control using real world logic?
Thank you for the feedback! In cases like these, it is really good if you can provide references to the relevant AIP documents. In this case, I have found the relevant document here:
Now, checking the “ATS Communication Facilities” page, find this:
As far as I can tell, our charts correctly report 121.730 as the secondary frequency and indicate that its hours of operation are limited with the asterisk. The AIP document also states that 121.630 is used for arrivals, while 121.905 is used for pushback clearances. 121.730 seems to have no such remarks, further indicating that it is a secondary frequency.
This means that the chart is technically correct. However, looking at the AIP APDC chart, these frequencies are indeed listed:
We could contact our data provider (Jeppesen) and see if they would consider changing this frequency based on this information. Please note that for them to do this, the change would need to positively impact their real-world customers who use these charts every day.
I’ll forward this to the responsible party and get back to you if I have any updates!
All you are saying are indeed correct. What I am referring to is indeed that 121.63 would be the appropriate frequency used for inbounds.
121.905 and 121.73 will be combined 95% of the time and if NOT combined would be a frequency to be send to from 121.905, which is as correctly stated is start up frequency.
