It's somewhat imotive. I remember seeing a situation when, at Bruggen, a IX Sqn GR1, operating from the southern taxiway, get's airborne but, looses a burner; "lummy days" he put the bloody thing back down on the ground and engages the RHAG!! Worst bit of adhering to the pre-take off brief I ever saw in all my life. They know who they were!
3P.