I appreciate there are a number of ACARs frequencies in Europe.
Which ones do business jets normally use since they don't have their own staff on the ground to talk to like an airline does? Is it the SITA or AIRINC European channels or do they use European primary 131.725mhz?
When a non European biz jet (e.g. US) comes into European airspace, which ACARS frequency will it use? Does it tune automatically or does the pilot have to manually pick a European ACARS frequency?
Thanks