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Transition stage
Vertical: controlled by path waypoint manager
Horizontal: controlled by path waypoint manager
Speed: does not need to be controlled
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Vertical: must be constantly and consistently changing (changingAltitude function)
Horizontal: controlled by path waypoint manager
Speed: must be set as a certain approach speed (depends on current wind) (approachSpeed function)
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Vertical: throttle must be at idle to decrease altitude (throttleOff function)
Horizontal: controlled by path waypoint manager
Speed: pitch up to slow flight (slowFlightSpeed function)
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