On 05/22/2013 01:16 PM, Clement de l'Hamaide wrote:

- Use 25KHz step frequencies (118.175, 124.225...)

how about 8.33kHz spacing?

You are aware that from next year 8.33Mhz spacing is mandatory for IFR in Europe (and already is above FL195)?
http://www.eurocontrol.int/articles/833-khz

Note that they are doing something funny there. The frequency you choose is not the frequency you send.

So if you are changing stuff to FGCOM /FG, maybe you can consider supporting 8.33kHz spacing?

cheers,

Eric