unmanned vertical flight

instantaneous vertical speed indicator / instantaneous vertical-speed indicator (IVSI)

unmanned vertical-takeoff-and-landing drone

vertical takeoff and landing tactical unmanned aerial vehicle

vertical takeoff and landing tactical unmanned air system

vertical takeoff and landing tactical unmanned air vehicle

vertical takeoff and landing unmanned aerial system

vertical takeoff and landing unmanned air vehicle

vertical takeoff unmanned aerial vehicle

vertical takeoff unmanned air system

vertical takeoff unmanned air vehicle

unmanned flight

flight restriction zone / flight restricted zone (FRZ)

high vertical inclination angle

vertical

vertical / short takeoff and landing (V/STOL)

vertical aerial photography

vertical angle

vertical axis

vertical blip

vertical datum plane

vertical distance

vertical envelopment

vertical gyro indicator

vertical photograph

vertical plane

vertical position

vertical replenishment (VERTREP)

vertical scale indicator

vertical stabilizer (fin)

vertical subordination

vertical take off and landing (VTOL)

vertical-lift aircraft