we open it up in 2
we open it up in 20 so question is how long is 2 2 minutes or 20 minutes?
I just verified this one. The message is e.g.:
"Roger. We'll open your flight plan
at 29"
Which means "now", in my example 29 minutes after the full hour, e.g. 10:29 for me some minutes ago (CEST), or 8:29 if we talk in UTC. Dropping the hour has the benefit of not needing to worry about the time zone most of the time (there are some time zones where this does not work though, because they don't have a full-hours offset from UTC).