Hi @Dave-Pilot2ATC,

Happy new year!

I've noticed on a couple of occasions, and this time I took a screen shot, that there are duplicate frequencies at airports in the same area, often on the Tower frequency, and when it happens, it obviously favours one over the other, and it's not normally the airport I need.

For example, I've just completed a flight from EGFF to EGHI. When I tried to tune the EGHI tower on 118.20 it gave me EGHH tower instead. I hadn't noticed this and wondered why Tower directed me to land on rw 08 when there isn't one at EGHI, and I couldn't override it either.

If you look at the frequencies list, you can see the duplicate. The one beneath is actually the correct one. I'm not sure where it's come from, I've loaded EGHH (stock airport) into WED and the frequencies are correct in there.

Cheers,

Mark. 

P.s. latest version of P2ATC, XP11 and AIRAC cycle. 

Edited January 2, 20206 yr by Highflyer525

The frequencies come from the AIRAC data, not the scenery files.

Hard to tell from the screenshot because it looks like the radio is turned off and the active frequency is not a valid one.

In a situation like this, if you are on the ground at EGHI, then the program will look for the nearest airport with a controller on 118.20 and assume that's the controller you want.  The exception is, if you select a different controller from a frequency list, like you have, it will display that controller.  If you click on the EGHI Twr entry near the top of the Freq Window, it should give you EGHI Twr.

As a test, if you start out a flight at EGHI, when you first connect, your radios will tune to 130.875 ATIS for active, and 118.20 EGHI Twr for standby.

When in  the air, you might be closer to EGHH than EGHI when you tune 118.20, and that could give you the wrong Twr.  I will check the logic and see if it can favor the airport in your flight plan.

Dave

Update:

To test current behavior, I just did a VFR flight from EGTE to EGHI, passing near EGHH on the way.  I was getting VFR Flight Following and on EGHI Radar Control freq 120.225.  When I dialed in 118.20, it came up as EGHI Twr, not EGHH Twr.  So it appears the current version of the program does properly include the flight plan destination airport in resolving multiple controller frequency conflicts.

Dave

Edited January 2, 20206 yr by Dave-Pilot2ATC

Hi @Dave-Pilot2ATC,

Thanks for the quick response. I think I can see what's causing it now after you pointed me in the right direction. It looks like an AIRAC error.

I did the test and it did start with EGHI tower as you suggested it would. However, when flying in from Cardiff, I selected EGHI Tower from the list but it jumped to the duplicate EGHH tower instead, and there was no way I could make it select EGHI's version instead.

I looked at my Navigraph maps, and for some strange reason, they've included a couple of Southampton frequencies in EGHH. See below.

I looked in the AIRAC data to see if it was the same in there and it is:

See how they've assigned two Southampton frequencies to the Bournemouth Airport ID? This is obviously causing the program to get confused.

Thanks

Mark.

whoops, didn't see your update until I'd posted. I'll try again and see what happens.

Edited January 2, 20206 yr by Highflyer525

hmm it worked correctly the second time. Great!!

I probably still let Navigraph know about their data being a bit iffy. 

Mark,

Thanks for the update.  Yes, let Navigraph know so it can get fixed eventually.

Dave