This very simple flight mode simply stops the vehicle as soon as possible using the Loiter controller. Once invoked, this mode does not accept any input from the pilot. This mode requires GPS.
The Brake flight mode was introduced in AC3.3.
When switched on, Brake mode will attempt to stop the vehicle as quickly as possible. Good GPS position, low magnetic interference on the compassand low vibrations are all important in achieving good performance.
If the vehicle is landed in Brake mode it will immediately disarm.
The pilots controls are ignored in this mode. The vehicle must be switched out of this mode before the pilot can re-take control.