CDU Divert frequencies and F10 map ATC showing 4.250. How to interpret this?

[coolts]

3 x radios allow between 36-76mhz / 116-152 mhz / 225-400 mhz.....So.... 4.25??

[Dragon1-1]

It's a bug. It shows a WWII-era HF channel that's no longer used very much. Some planes IRL can talk on HF for extremely long range comms, but the A-10C isn't one of them, and I don't think any of the modern fighters we have has a HF radio.

[SJBMX]

Typo of 42.50 mHz?

[Frederf]

It's actually 4.25MHz. Those old radios used those frequencies.

 

You have to think like a programmer to see how this can happen. Batumi airfield has lots of ATC frequencies almost certainly stored as an array. Say the original array back when the system was programmed was freqTable = [111MHz, 222Mhz, 33MHz] for the VHF, UHF, and FM frequencies. So the A-10 divert page was programmed to pull a specific element out of that array to display on the page text. So how do you link to the frequency you want if you want to show VHF AM? You display.Batumi.freqTable select 0. This picks out the 0th element of the Batumi.freqTable array which is the first one. That's how the A-10 worked and it pulled the correct frequency for years.

 

But what happens if someone changes the freqTable array, say to [4.25, 111, 222, 33]? The A-10 is now pulling the 0th element of the array just like it was programmed but the 0th element is the wrong piece of data. The same programming written years ago that used to pull the right data is pulling the wrong data because the reference data changed.

[dorianR666]

this broke in like early 2018, ED never bothered to fix it. hopefully the could now.

 

 

[coolts]

It's actually 4.25MHz. Those old radios used those frequencies.

 

You have to think like a programmer to see how this can happen. Batumi airfield has lots of ATC frequencies almost certainly stored as an array. Say the original array back when the system was programmed was freqTable = [111MHz, 222Mhz, 33MHz] for the VHF, UHF, and FM frequencies. So the A-10 divert page was programmed to pull a specific element out of that array to display on the page text. So how do you link to the frequency you want if you want to show VHF AM? You display.Batumi.freqTable select 0. This picks out the 0th element of the Batumi.freqTable array which is the first one. That's how the A-10 worked and it pulled the correct frequency for years.

 

But what happens if someone changes the freqTable array, say to [4.25, 111, 222, 33]? The A-10 is now pulling the 0th element of the array just like it was programmed but the 0th element is the wrong piece of data. The same programming written years ago that used to pull the right data is pulling the wrong data because the reference data changed.

 

So its just needs someone to adjust the array order? That's like 1/2 an hours work. Surely.