Infinite Flight’s v20.2 update will come with the new departure sequencing commands, seen in a new video here.
In the video, you can see from the perspective of the pilot that they will be able to request departure in sequence. The Tower controller then sequences the pilot, letting them know that they are number 2 for departure.
3.2.2 — Controllers can utilize the Departure Sequence menu if they wish to provide sequence information to aircraft that are ready for departure (particularly useful when aircraft are confused who is next due to factors such as taxiway layout). The use of “Hold Short” must always be used if the aircraft is number 1 for departure, or if the Controller is unsure on the sequence number – however in any other circumstance the Controller can elect to inform the aircraft of their departure sequence if they want to. In addition, aircraft do not need to be first in line to announce “ready for departure” (and may also utilize the “in sequence” message) – this is useful for planning purposes and especially when Intersection Departures are in use (see 3.2.5 below).
This change also comes with the removal of the “Request departure only when first in line” Broadcast message, since pilots will now be allowed to request departure when they are not first in line.