A CPU determines whether a generated low-level drawing command is associated with drawing of a gray object and a color value of the gray object is greater than a determination value. The CC data is kept in the same format that it was received and the TV’s decoder processor processes the packets and renders CC text as if the CC data had been received by the tuner of the TV. A sensor detects the object’s movement and an actuator applies output force on the physical object. Moreover, there is provided an upper limit for the number of items whose intervals can be reduced simultaneously. The UV lamp has a substantially rod-shaped lamp body. In the flight control system of the present invention, selected control inputs are sent the rotorcraft prior to the onset of the vortex ring state.