I don’t know if this is a real-world command, but it would be helpful in Infinite Flight.
For example, an overweight Delta A330-300 (Vr of 165) is told to line up and wait at TAPA. The pilot sees that the runway is not long enough to safely takeoff. Currently, he can either:
- Dump some weight
- Takeoff and overrun the runway
- Backtaxi and possibly get ghosted for not following instructions.
With this command, the pilot could request a backtaxi and be able to safely takeoff without overrunning or unrealistically dumping fuel (or passengers)